1
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Yue J, Yang H, Liu C, Wang S, Wang L. Unraveling the pyridinic nitrogen vacancy in carbon nitride for photo-self Fenton-like purification of organic contaminants. J Colloid Interface Sci 2024; 673:475-485. [PMID: 38879989 DOI: 10.1016/j.jcis.2024.06.104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2024] [Revised: 06/07/2024] [Accepted: 06/12/2024] [Indexed: 06/18/2024]
Abstract
This work reports a carbon nitride with pyridinic nitrogen-vacancy (N2CV-CN), which purifies organic contaminants via an in-situ photo-self Fenton-like reaction. Experiments and calculations demonstrated that the nitrogen-vacancy induces lone-paired (LP) and symmetry-unpaired electrons, promoting the formation of low-energy LP-π hybridized orbitals and helping to overcome the pairing energy required for oxygen to accept electrons. Furthermore, the nitrogen-vacancy accelerates film and intra-particle diffusion rates of organic contaminants on N2CV-CN, creating beneficial conditions for reactive oxide species to mineralize organic contaminants. Under sunlight and atmospheric oxygen, a photo-self Fenton-like reaction involving proton-coupled electron transfer occurred on the surface of N2CV-CN. Furthermore, by integrating photocatalysis with flocculation, about 99.1 % suspended substance, 45.5 % chemical oxygen demand, and 38.4 % biological oxygen demand were reduced from polluted river-water. Constructing N2CV-CN and understanding its crucial role offer theoretical and methodological insights into the in-situ purification of contaminated water bodies.
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Affiliation(s)
- Junpeng Yue
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing 210098, China
| | - Hanpei Yang
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing 210098, China.
| | - Chen Liu
- Key Laboratory of Reservoir Aquatic Environment, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China
| | - Shi Wang
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing 210098, China
| | - Lina Wang
- College of Civil Engineering and Architecture, Quzhou University, Quzhou 324000, China
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2
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Wang H, Yan C, Xu M, Li J, Zhang Z, Song X, Liu X, Huo P. Pd Nanoparticle-Modified BiOBr/CdS S-Scheme Photocatalyst for Enhanced Conversion of CO 2. Inorg Chem 2024. [PMID: 39213634 DOI: 10.1021/acs.inorgchem.4c03112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/04/2024]
Abstract
S-scheme heterojunction photocatalyst-coupled plasma-resonance effect can enhance the response range and absorption of light and charge transfer, and, at the same time, obtain strong redox ability, which is an effective way to improve CO2 conversion. In this work, plasma S-scheme heterojunctions of Pd/BiOBr/CdS with heterogeneous interfaces have been successfully constructed by a simple hydrothermal method. The possible reaction mechanism was proposed by in situ infrared, ultraviolet-visible spectroscopy (UV-vis), electron paramagnetic resonance (ESR), density functional theory (DFT), and electrochemical techniques. It was proved that the plasma S-scheme heterojunction can enhance the charge separation efficiency and improve the photocatalytic activity. When the loading ratio is Pd0.6-10%-BiOBr/CdS, it has the best performance, and the CO yield is 30.24 μmol/g, which is 15 and 30 times that of pure BiOBr and CdS, respectively. The results show that with the strong absorption of photon energy and the special electron transfer mode of S-scheme heterojunction, the charge can be effectively separated and transferred, and the photocatalytic activity is significantly improved. This study provides a useful strategy for charge transfer kinetics of plasma S-scheme heterojunction photocatalysts.
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Affiliation(s)
- Huiqin Wang
- School of Energy and Power Engineering, Jiangsu University, Zhenjiang 212013, PR China
| | - Chenlong Yan
- School of Energy and Power Engineering, Jiangsu University, Zhenjiang 212013, PR China
| | - Mengyang Xu
- Institute of Green Chemistry and Chemical Technology, School of Chemistry & Chemical Engineering, Jiangsu University, Zhenjiang 212013, PR China
| | - Jinze Li
- China Construction Eco-environmental Protection Technology CO., LTD., Suzhou 215124, PR China
| | - Ziyang Zhang
- Institute of Green Chemistry and Chemical Technology, School of Chemistry & Chemical Engineering, Jiangsu University, Zhenjiang 212013, PR China
| | - Xianghai Song
- Institute of Green Chemistry and Chemical Technology, School of Chemistry & Chemical Engineering, Jiangsu University, Zhenjiang 212013, PR China
| | - Xin Liu
- Institute of Green Chemistry and Chemical Technology, School of Chemistry & Chemical Engineering, Jiangsu University, Zhenjiang 212013, PR China
| | - Pengwei Huo
- Institute of Green Chemistry and Chemical Technology, School of Chemistry & Chemical Engineering, Jiangsu University, Zhenjiang 212013, PR China
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3
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Xie JQ, Ji D, Chang Z, Wu Y, Lv Q, Liu X, Shi L. Synergy of P doping and crystallinity modulation in carbon nitride for enhancing photocatalytic uranyl reduction. J Colloid Interface Sci 2024; 678:63-76. [PMID: 39180849 DOI: 10.1016/j.jcis.2024.08.128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2024] [Revised: 08/11/2024] [Accepted: 08/16/2024] [Indexed: 08/27/2024]
Abstract
Doping modification is a useful way to promote the catalytic activity of carbon nitride (CN). However, most doped CNs have lower structural symmetry and several edge defects, which hinder the transfer of charge carriers. This work reports a P-doped crystalline carbon nitride (crystalline PCN) for the efficient photoreduction of uranyl. The thermal polymerization and salt post-treatment convert the amorphous PCN into crystalline PCN. Compared to the pristine CN, the crystalline PCN has over 1620 % higher activity for uranyl (U(VI)) reduction, reaching a 97.8 % reduction rate in 60 min. Furthermore, the 2-PCN shows excellent stability and a U(VI) removal efficiency >85.7 % in the pH range of 5-8. Characterization analysis reveal that both the P doping and crystalline modulation do not obviously change their morphology, light absorption property and energy band structure, but markedly promote the delocalization of electrons around the doped P atoms, thereby severely inhibit direct electron-hole recombination. Thus, the more efficient separation of charge carriers generates more reactive specials to participate in the photocatalytic uranyl reduction reaction. This study demonstrates a dual-modification strategy for the rational synthesis of highly active metal-free CN-based photocatalysts for uranyl reduction.
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Affiliation(s)
- Jin-Qi Xie
- Hunan Key Laboratory for the Design and Application of Actinide Complexes, College of Chemistry and Chemical Engineering, University of South China, Hengyang, Hunan 421001, China
| | - Daozhuo Ji
- School of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Ziyang Chang
- Hunan Key Laboratory for the Design and Application of Actinide Complexes, College of Chemistry and Chemical Engineering, University of South China, Hengyang, Hunan 421001, China
| | - Yuhong Wu
- Hunan Key Laboratory for the Design and Application of Actinide Complexes, College of Chemistry and Chemical Engineering, University of South China, Hengyang, Hunan 421001, China
| | - Qiqi Lv
- Hunan Key Laboratory for the Design and Application of Actinide Complexes, College of Chemistry and Chemical Engineering, University of South China, Hengyang, Hunan 421001, China
| | - Xiaokang Liu
- Hunan Key Laboratory for the Design and Application of Actinide Complexes, College of Chemistry and Chemical Engineering, University of South China, Hengyang, Hunan 421001, China
| | - Lang Shi
- Hunan Key Laboratory for the Design and Application of Actinide Complexes, College of Chemistry and Chemical Engineering, University of South China, Hengyang, Hunan 421001, China.
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4
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Chen J, Yang M, Zhang H, Chen Y, Ji Y, Yu R, Liu Z. Boosting the Activation of Molecular Oxygen and the Degradation of Rhodamine B in Polar-Functional-Group-Modified g-C 3N 4. Molecules 2024; 29:3836. [PMID: 39202915 PMCID: PMC11356892 DOI: 10.3390/molecules29163836] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2024] [Revised: 08/02/2024] [Accepted: 08/07/2024] [Indexed: 09/03/2024] Open
Abstract
Molecular oxygen activation often suffers from high energy consumption and low efficiency. Developing eco-friendly and effective photocatalysts remains a key challenge for advancing green molecular oxygen activation. Herein, graphitic carbon nitride (g-C3N4) with abundant hydroxyl groups (HCN) was synthesized to investigate the relationship between these polar groups and molecular oxygen activation. The advantage of the hydroxyl group modification of g-C3N4 included narrower interlayer distances, a larger specific surface area and improved hydrophilicity. Various photoelectronic measurements revealed that the introduced hydroxyl groups reduced the charge transfer resistance of HCN, resulting in accelerated charge separation and migration kinetics. Therefore, the optimal HCN-90 showed the highest activity for Rhodamine B photodegradation with a reaction time of 30 min and an apparent rate constant of 0.125 min-1, surpassing most other g-C3N4 composites. This enhanced activity was attributed to the adjusted band structure achieved through polar functional group modification. The modification of polar functional groups could alter the energy band structure of photocatalysts, narrow band gap, enhance visible-light absorption, and improve photogenerated carrier separation efficiency. This work highlights the significant potential of polar functional groups in tuning the structure of g-C3N4 to enhance efficient molecular oxygen activation.
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Affiliation(s)
- Jing Chen
- Key Laboratory of Flexible Electronics of Zhejiang Province, Ningbo Institute of Northwestern Polytechnical University, Ningbo 315103, China
- Department of Chemical and Material Engineering, Quzhou College of Technology, Quzhou 324002, China; (M.Y.); (H.Z.)
| | - Minghua Yang
- Department of Chemical and Material Engineering, Quzhou College of Technology, Quzhou 324002, China; (M.Y.); (H.Z.)
| | - Hongjiao Zhang
- Department of Chemical and Material Engineering, Quzhou College of Technology, Quzhou 324002, China; (M.Y.); (H.Z.)
| | - Yuxin Chen
- Department of Chemistry, Lishui University, 1 Xueyuan Road, Lishui 323000, China; (Y.C.); (Y.J.); (R.Y.)
| | - Yujie Ji
- Department of Chemistry, Lishui University, 1 Xueyuan Road, Lishui 323000, China; (Y.C.); (Y.J.); (R.Y.)
| | - Ruohan Yu
- Department of Chemistry, Lishui University, 1 Xueyuan Road, Lishui 323000, China; (Y.C.); (Y.J.); (R.Y.)
| | - Zhenguo Liu
- Key Laboratory of Flexible Electronics of Zhejiang Province, Ningbo Institute of Northwestern Polytechnical University, Ningbo 315103, China
- School of Flexible Electronics and Henan Institute of Flexible Electronics, Henan University, Zhengzhou 450046, China
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5
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Ma Y, Han Y, Yao Y, Zhou T, Sun D, Liu C, Che G, Hu B, Valtchev V, Fang Q. A cobalt-modified covalent organic framework enables highly efficient degradation of 2,4-dichlorophenol in high concentrations through peroxymonosulfate activation. Chem Sci 2024; 15:12488-12495. [PMID: 39118632 PMCID: PMC11304524 DOI: 10.1039/d4sc02462a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2024] [Accepted: 07/02/2024] [Indexed: 08/10/2024] Open
Abstract
The development of covalent organic frameworks (COFs) which can rapidly degrade high concentrations of 2,4-dichlorophenol is of great significance for its practical application. In this work, we report a cobalt-doped two-dimensional (2D) COF (JLNU-307-Co) for the ultra-efficient degradation of high concentration 2,4-dichlorophenol (2,4-DCP) by activating peroxymonosulfate (PMS). The JLNU-307-Co/PMS system takes only 3 min to degrade 100% of 50 mg L-1 2,4-DCP and shows excellent catalytic stability in real water. The superoxide radical (O2˙-) and singlet oxygen (1O2) play a major role in the system through capture experiments and electron spin resonance (ESR) tests. Compared to most previously reported catalysts, JLNU-307-Co/PMS showed the highest efficiency to date in degrading 2,4-DCP. This work not only demonstrates the potential of COFs as a catalyst for water environmental treatment, but also provides unprecedented insights into the degradation of organic pollutants.
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Affiliation(s)
- Yunchao Ma
- Key Laboratory of Preparation and Application of Environmental Friendly Materials (Jilin Normal University), Ministry of Education Changchun 130103 P. R. China
| | - Yuhang Han
- Key Laboratory of Preparation and Application of Environmental Friendly Materials (Jilin Normal University), Ministry of Education Changchun 130103 P. R. China
| | - Yuxin Yao
- Key Laboratory of Preparation and Application of Environmental Friendly Materials (Jilin Normal University), Ministry of Education Changchun 130103 P. R. China
| | - Tianyu Zhou
- Key Laboratory of Preparation and Application of Environmental Friendly Materials (Jilin Normal University), Ministry of Education Changchun 130103 P. R. China
- Jilin Joint Technology Innovation Laboratory of Developing and Utilizing Materials of Reducing Pollution and Carbon Emissions, College of Engineering, Jilin Normal University Siping 136000 China
| | - Dongshu Sun
- Key Laboratory of Preparation and Application of Environmental Friendly Materials (Jilin Normal University), Ministry of Education Changchun 130103 P. R. China
| | - Chunbo Liu
- Jilin Joint Technology Innovation Laboratory of Developing and Utilizing Materials of Reducing Pollution and Carbon Emissions, College of Engineering, Jilin Normal University Siping 136000 China
| | - Guangbo Che
- College of Chemistry, Baicheng Normal University Baicheng 137000 China
| | - Bo Hu
- Key Laboratory of Preparation and Application of Environmental Friendly Materials (Jilin Normal University), Ministry of Education Changchun 130103 P. R. China
| | - Valentin Valtchev
- Qindao Institute of Bioenergy and Bioprocess Technology Chinese Academy of Sciences 189 Song Ling Rd Qingdao Shangdong 266101 China
| | - Qianrong Fang
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin University Changchun 130012 China
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6
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Zhu Q, Shi L, Li Z, Li G, Xu X. Protonation of an Imine-linked Covalent Organic Framework for Efficient H 2O 2 Photosynthesis under Visible Light up to 700 nm. Angew Chem Int Ed Engl 2024; 63:e202408041. [PMID: 38738797 DOI: 10.1002/anie.202408041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2024] [Revised: 05/10/2024] [Accepted: 05/13/2024] [Indexed: 05/14/2024]
Abstract
Covalent organic frameworks (COFs) are promising photocatalysts for H2O2 production from water via oxygen reduction reaction (ORR). The design of COFs for efficient H2O2 production indubitably hinges on an in-depth understanding of their ORR mechanisms. In this work, taking an imine-linked COF as an example, we demonstrate that protonation of the functional units such as imine, amine, and triazine, is a highly efficient strategy to upgrade the activity levels for H2O2 synthesis. The protonation not only extends the light absorption of the COF but also provides proton sources that directly participate in H2O2 generation. Notably, the protonation simplifies the reaction pathways of ORR to H2O2, i.e. from an indirect superoxide radical (O 2 • - ${{O}_{2}^{\bullet -}}$ ) mediated route to a direct one-step two-electron route. Theoretical calculations confirm that the protonation favors H2O2 synthesis due to easy access of protons near the reaction sites that removes the energy barrier for generating *OOH intermediate. These findings not only extend the mechanistic insight into H2O2 photosynthesis but also provide a rational guideline for the design and upgradation of efficient COFs.
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Affiliation(s)
- Qiong Zhu
- School of Chemical Science and Engineering, Tongji University, Shanghai, 200092, P.R. China
| | - Li Shi
- State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications, Nanjing, 210023, P.R. China
| | - Zhuo Li
- College of Environment Science and Engineering, Tongji University, Shanghai, 200092, P.R. China
| | - Guisheng Li
- School of Materials and Chemistry, University of Shanghai for Science and Technology, Shanghai, 200093, P.R. China
| | - Xiaoxiang Xu
- School of Chemical Science and Engineering, Tongji University, Shanghai, 200092, P.R. China
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7
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Xu J, Che H, Tang C, Liu B, Ao Y. Tandem Fields Facilitating Directional Carrier Migration in Van der Waals Heterojunction for Efficient Overall Piezo-Synthesis of H 2O 2. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2404539. [PMID: 38810126 DOI: 10.1002/adma.202404539] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2024] [Revised: 05/23/2024] [Indexed: 05/31/2024]
Abstract
Piezo-synthesis of H2O2 utilizing sustainable mechanical energy as well as earth-abundant water and oxygen is a green, cost-effective, and promising approach. However, achieving simultaneous two-electron water oxidation reaction (2e- WOR) and two-electron oxygen reduction reaction (2e- ORR) faces huge challenges due to insufficient synergistic active sites and slow/messy carrier transfer. Herein, a novel 2D/2D van der Waals heterojunction consisting of BiOIO3 and carbon nitride (BIO/CN) is elaborately designed for highly efficient overall H2O2 piezo-synthesis. Theoretical/experimental results reveal that a Z-scheme electron transfer is formed and facilitated by the tandem interfacial electric field and the bulk piezo-polarization field. On this basis, the carriers are efficiently separated while the oxidation/reduction capacity is preserved, thus providing the strong driving force for the 2e- WOR and 2e- ORR on BIO and CN, respectively. Furthermore, the kinetic and thermodynamic processes of WOR and ORR for H2O2 synthesis improve remarkably. Therefore, BIO/CN exhibits an excellent H2O2 yield of 259.8 µM within 30 min in pure water and air atmosphere (without any sacrificial agents and aeration). This study provides a new idea on strategically controlling electron transfer toward high-efficiency H2O2 piezo-synthesis and expands the avenue for developing effective environmental purification materials.
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Affiliation(s)
- Jing Xu
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, No.1, Xikang Road, Nanjing, 210098, China
| | - Huinan Che
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, No.1, Xikang Road, Nanjing, 210098, China
| | - Chunmei Tang
- College of Science, Hohai University, No.1, Xikang road, Nanjing, 210098, China
| | - Bin Liu
- Department of Materials Science and Engineering, City University of Hong Kong, Hong Kong, SAR, 999077, China
| | - Yanhui Ao
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, No.1, Xikang Road, Nanjing, 210098, China
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8
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Shen Y, Xu R, Shan P, Zhang S, Sun L, Xie H, Guo F, Li C, Shi W. Abundant Edge Active Sites-Modified High-Crystalline g-C 3N 5 for Hydrogen Peroxide Production from Pure-Water via a Quasi-Homogeneous Photocatalytic Process. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2401566. [PMID: 38752437 DOI: 10.1002/smll.202401566] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2024] [Revised: 03/22/2024] [Indexed: 08/29/2024]
Abstract
Ultrathin carbon nitride pioneered a paradigm that facilitates effective charge separation and acceleration of rapid charge migration. Nevertheless, the dissociation process confronts a disruption owing to the proclivity of carbon nitride to reaggregate, thereby impeding the optimal utilization of active sites. In response to this exigency, the adoption of a synthesis methodology featuring alkaline potassium salt-assisted molten salt synthesis is advocated in this work, aiming to craft a nitrogenated graphitic carbon nitride (g-C3N5) photocatalyst characterized by thin layer and hydrophilicity, which not only amplifies the degree of crystallization of g-C3N5 but also introduces a plethora of abundant edge active sites, engendering a quasi-homogeneous photocatalytic system. Under visible light irradiation, the ultra-high H2O2 production rate of this modified high-crystalline g-C3N5 in pure water attains 151.14 µm h-1. This groundbreaking study offers a novel perspective for the innovative design of highly efficient photocatalysts with a quasi-homogeneous photocatalytic system.
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Affiliation(s)
- Yu Shen
- School of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu, 212003, P. R. China
| | - Rui Xu
- School of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu, 212003, P. R. China
| | - Pengnian Shan
- School of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu, 212003, P. R. China
| | - Shunhong Zhang
- School of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu, 212003, P. R. China
| | - Lei Sun
- School of Material Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu, 212003, P. R. China
| | - Haijiao Xie
- Hangzhou Yanqu Information Technology Co., Ltd. Y2, 2nd Floor, Building 2, Xixi Legu Creative Pioneering Park, No. 712 Wen'er West Road, Xihu District, Hangzhou, Zhejiang, 310003, P. R. China
| | - Feng Guo
- School of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu, 212003, P. R. China
| | - Chunsheng Li
- Key Laboratory of Advanced Electrode Materials for Novel Solar Cells for Petroleum and Chemical Industry of China, School of Chemistry and Life Sciences, Suzhou University of Science and Technology, Suzhou, Jiangsu, 215009, P. R. China
| | - Weilong Shi
- School of Material Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu, 212003, P. R. China
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9
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Zhang Q, Che H, Yang H, Liu B, Ao Y. Tandem Proton Transfer in Carboxylated Supramolecular Polymer for Highly Efficient Overall Photosynthesis of Hydrogen Peroxide. Angew Chem Int Ed Engl 2024:e202409328. [PMID: 38958874 DOI: 10.1002/anie.202409328] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2024] [Revised: 06/25/2024] [Accepted: 07/02/2024] [Indexed: 07/04/2024]
Abstract
Proton supply is as critical as O2 activation for artificial photosynthesis of hydrogen peroxide (H2O2) via two-electron oxygen reduction reaction (2e- ORR). However, proton release via water dissociation is frequently hindered because of the sluggish water oxidation reaction (WOR), extremely limiting the efficiency of photocatalytic H2O2 production. To tackle this challenge, carboxyl-enriched supramolecular polymer (perylene tetracarboxylic acid-PTCA) is elaborately prepared by molecular self-assembly for overall photosynthesis of H2O2. Interestingly, the interconversion between carboxyl as Brønsted acid and its conjugated base realizes rapid proton circulation. Through this efficient tandem proton transfer process, the spatial effect of photocatalytic reduction and oxidation reaction is greatly enhanced with reduced reaction barrier. This significantly facilitates 2e- photocatalytic ORR to synthesize H2O2 and in the meanwhile promotes 4e- photocatalytic WOR to evolve O2. Consequently, the as-developed PTCA exhibits a remarkable H2O2 yield of 185.6 μM h-1 in pure water and air atmosphere under visible light illumination. More impressively, an appreciable H2O2 yield of 78.6 μM h-1 can be well maintained in an anaerobic system owing to in situ O2 generation by 4e- photocatalytic WOR. Our study presents a novel concept for artificial photosynthesis of H2O2 via constructing efficient proton transfer pathway to enable rapid proton circulation.
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Affiliation(s)
- Qiang Zhang
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, No.1, Xikang road, Nanjing, 210098, China
| | - Huinan Che
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, No.1, Xikang road, Nanjing, 210098, China
| | - Hongbin Yang
- School of Materials Science and Engineering, Suzhou University of Science and Technology, Suzhou, 215009, China
| | - Bin Liu
- Department of Materials Science and Engineering, City University of Hong Kong, Hong Kong SAR, 999077, China
- Department of Chemistry & Center of Super-Diamond and Advanced Films (COSDAF), City University of Hong Kong, Hong Kong SAR, 999077, China
| | - Yanhui Ao
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, No.1, Xikang road, Nanjing, 210098, China
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10
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Liu W, Wang P, Chen J, Gao X, Che H, Su X, Liu B, Ao Y. In situ single iron atom doping on Bi 2WO 6 monolayers triggers efficient photo-fenton reaction. ENVIRONMENTAL SCIENCE AND ECOTECHNOLOGY 2024; 20:100414. [PMID: 38606035 PMCID: PMC11007430 DOI: 10.1016/j.ese.2024.100414] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Revised: 03/08/2024] [Accepted: 03/08/2024] [Indexed: 04/13/2024]
Abstract
Developing an efficient photocatalytic system for hydrogen peroxide (H2O2) activation in Fenton-like processes holds significant promise for advancing water purification technologies. However, challenges such as high carrier recombination rates, limited active sites, and suboptimal H2O2 activation efficiency impede optimal performance. Here we show that single-iron-atom dispersed Bi2WO6 monolayers (SIAD-BWOM), designed through a facile hydrothermal approach, can offer abundant active sites for H2O2 activation. The SIAD-BWOM catalyst demonstrates superior photo-Fenton degradation capabilities, particularly for the persistent pesticide dinotefuran (DNF), showcasing its potential in addressing recalcitrant organic pollutants. We reveal that the incorporation of iron atoms in place of tungsten within the electron-rich [WO4]2- layers significantly facilitates electron transfer processes and boosts the Fe(II)/Fe(III) cycle efficiency. Complementary experimental investigations and theoretical analyses further elucidate how the atomically dispersed iron induces lattice strain in the Bi2WO6 monolayer, thereby modulating the d-band center of iron to improve H2O2 adsorption and activation. Our research provides a practical framework for developing advanced photo-Fenton catalysts, which can be used to treat emerging and refractory organic pollutants more effectively.
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Affiliation(s)
- Wei Liu
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, No.1, Xikang Road, Nanjing, 210098, China
| | - Peifang Wang
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, No.1, Xikang Road, Nanjing, 210098, China
| | - Juan Chen
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, No.1, Xikang Road, Nanjing, 210098, China
| | - Xin Gao
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, No.1, Xikang Road, Nanjing, 210098, China
| | - Huinan Che
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, No.1, Xikang Road, Nanjing, 210098, China
| | - Xiaozhi Su
- Shanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, 201204, China
| | - Bin Liu
- School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore, 637459, Singapore
| | - Yanhui Ao
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, No.1, Xikang Road, Nanjing, 210098, China
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11
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Hu J, Li J, Pu Z, Xiao W, Yu H, Zhang Z, Yu F, Liu C, Zhang Q. S-scheme NiO/C 3N 5 heterojunctions with enhanced interfacial electric field for boosting photothermal-assisted photocatalytic H 2 and H 2O 2 production. J Colloid Interface Sci 2024; 665:780-792. [PMID: 38554468 DOI: 10.1016/j.jcis.2024.03.178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2023] [Revised: 03/22/2024] [Accepted: 03/26/2024] [Indexed: 04/01/2024]
Abstract
Heterostructured visible-light-responsive photocatalysts represent a prospective approach to achieve efficient solar-to-chemical energy conversion. Herein, we propose a facile self-assembly technique to synthesize NiO nanoparticles/C3N5 nanosheets (NOCN) heterojunctions for hydrogen (H2) evolution catalysis and hydrogen peroxide (H2O2) production under visible light. In this regard, the black NiO nanoparticles (NPs) were tightly anchored on the surface of C3N5 nanosheets (CNNS) to construct S-scheme NOCN heterojunction, enabling efficient charge separation and high redox capability. Obtained results elucidated that the incorporated NiO NPs significantly promote light-harvesting efficiency and photo-to-thermal capacity over the NOCN composites. The enhanced photothermal effect facilitates the charge carrier transfer rate across the heterojunction and boosts the surface reaction kinetics. Accordingly, the photocatalytic performances of CNNS for H2 release and H2O2 production can be manipulated by introducing NiO NPs. The modified photocatalytic properties of NOCN composites are ascribed to the synergistic effects of all integrated components and the S-scheme heterojunction formation. Impressively, the high H2 evolution photocatalysis efficiency of NOCN nano-catalysts in seawater certifies their potential environmental applicability. Among all, the 12-NOCN nano-catalyst exhibits a higher photocatalytic efficiency for H2 release (112.2 μmol∙g-1∙h-1) and H2O2 production (91.2 μmol∙L-1∙h-1). Besides, the 12-NOCN nano-catalyst reveals excellent recyclability and structural stability. Additionally, the possible mechanism for photothermal-assisted photocatalysis is proposed. This work affords a feasible pathway to design photothermal-assisted S-scheme heterojunctions for diverse photocatalytic applications.
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Affiliation(s)
- Jiawei Hu
- School of Materials Science and Engineering, Yancheng Institute of Technology, Yancheng 224051, China
| | - Jiaming Li
- School of Materials Science and Engineering, Yancheng Institute of Technology, Yancheng 224051, China
| | - Zhongyi Pu
- School of Materials Science and Engineering, Yancheng Institute of Technology, Yancheng 224051, China
| | - Wen Xiao
- School of Materials Science and Engineering, Yancheng Institute of Technology, Yancheng 224051, China
| | - Huan Yu
- School of Materials Science and Engineering, Yancheng Institute of Technology, Yancheng 224051, China
| | - Zhihao Zhang
- School of Materials Science and Engineering, Yancheng Institute of Technology, Yancheng 224051, China
| | - Fang Yu
- School of Materials Science and Engineering, Yancheng Institute of Technology, Yancheng 224051, China
| | - Chao Liu
- School of Materials Science and Engineering, Yancheng Institute of Technology, Yancheng 224051, China; Jiangsu Provincial Key Laboratory of Eco-Environmental Materials, Yancheng Institute of Technology, Yancheng 224051, China.
| | - Qinfang Zhang
- School of Materials Science and Engineering, Yancheng Institute of Technology, Yancheng 224051, China.
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12
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Wang J, Liang J, Hou H, Liu W, Wu H, Sun H, Ou W, Su C, Liu B. Heterogeneous organophotocatalytic HBr oxidation coupled with oxygen reduction for boosting bromination of arenes. Nat Commun 2024; 15:4744. [PMID: 38834549 DOI: 10.1038/s41467-024-48349-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Accepted: 04/28/2024] [Indexed: 06/06/2024] Open
Abstract
Developing mild photocatalytic bromination strategies using sustainable bromo source has been attracting intense interests, but there is still much room for improvement. Full utilization of redox centers of photocatalysts for efficient generation of Br+ species is the key. Herein we report heterogenous organophotocatalytic HBr oxidation coupled with oxygen reduction to furnish Br2 and H2O2 for effective bromination of arenes over Al2O3 supported perylene-3,4,9,10-tetracarboxylic dianhydride (PTCDA). Mechanism studies suggest that O-vacancy in Al2O3 can provide Lewis-acid-type anchoring sites for O2, enabling unexpected dual-electron transfer from anchored photoexcited PTCDA to chemically bound O2 to produce H2O2. The in-situ generated H2O2 and Br2 over redox centers work together to generate HBrO for bromination of arenes. This work provides new insights that heterogenization of organophotocatalysts can not only help to improve their stability and recyclability, but also endow them with the ability to trigger unusual reaction mode via cooperative catalysis with supports.
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Affiliation(s)
- Jie Wang
- International Collaborative Laboratory of 2D Materials for Optoelectronic Science & Technology, Engineering Technology Research Center for 2D Materials Information Functional Devices and Systems of Guangdong Province, Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen, 518060, China
- State Key Laboratory of Radio Frequency Heterogeneous Integration, Shenzhen University, Shenzhen, 518060, China
| | - Jiahao Liang
- International Collaborative Laboratory of 2D Materials for Optoelectronic Science & Technology, Engineering Technology Research Center for 2D Materials Information Functional Devices and Systems of Guangdong Province, Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen, 518060, China
- State Key Laboratory of Radio Frequency Heterogeneous Integration, Shenzhen University, Shenzhen, 518060, China
| | - Hao Hou
- International Collaborative Laboratory of 2D Materials for Optoelectronic Science & Technology, Engineering Technology Research Center for 2D Materials Information Functional Devices and Systems of Guangdong Province, Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen, 518060, China
- State Key Laboratory of Radio Frequency Heterogeneous Integration, Shenzhen University, Shenzhen, 518060, China
| | - Wei Liu
- International Collaborative Laboratory of 2D Materials for Optoelectronic Science & Technology, Engineering Technology Research Center for 2D Materials Information Functional Devices and Systems of Guangdong Province, Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen, 518060, China
- State Key Laboratory of Radio Frequency Heterogeneous Integration, Shenzhen University, Shenzhen, 518060, China
| | - Hongru Wu
- International Collaborative Laboratory of 2D Materials for Optoelectronic Science & Technology, Engineering Technology Research Center for 2D Materials Information Functional Devices and Systems of Guangdong Province, Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen, 518060, China
- State Key Laboratory of Radio Frequency Heterogeneous Integration, Shenzhen University, Shenzhen, 518060, China
| | - Hongli Sun
- International Collaborative Laboratory of 2D Materials for Optoelectronic Science & Technology, Engineering Technology Research Center for 2D Materials Information Functional Devices and Systems of Guangdong Province, Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen, 518060, China
- State Key Laboratory of Radio Frequency Heterogeneous Integration, Shenzhen University, Shenzhen, 518060, China
| | - Wei Ou
- International Collaborative Laboratory of 2D Materials for Optoelectronic Science & Technology, Engineering Technology Research Center for 2D Materials Information Functional Devices and Systems of Guangdong Province, Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen, 518060, China
- State Key Laboratory of Radio Frequency Heterogeneous Integration, Shenzhen University, Shenzhen, 518060, China
| | - Chenliang Su
- International Collaborative Laboratory of 2D Materials for Optoelectronic Science & Technology, Engineering Technology Research Center for 2D Materials Information Functional Devices and Systems of Guangdong Province, Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen, 518060, China.
- State Key Laboratory of Radio Frequency Heterogeneous Integration, Shenzhen University, Shenzhen, 518060, China.
| | - Bin Liu
- Department of Materials Science and Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, SAR 999007, China.
- Department of Chemistry, Hong Kong Institute of Clean Energy (HKICE) & Center of Super-Diamond and Advanced Films (COSDAF), City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, SAR 999007, China.
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13
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Bai CW, Liu LL, Chen JJ, Chen F, Zhang ZQ, Sun YJ, Chen XJ, Yang Q, Yu HQ. Circumventing bottlenecks in H 2O 2 photosynthesis over carbon nitride with iodine redox chemistry and electric field effects. Nat Commun 2024; 15:4718. [PMID: 38830881 DOI: 10.1038/s41467-024-49046-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Accepted: 05/22/2024] [Indexed: 06/05/2024] Open
Abstract
Artificial photosynthesis using carbon nitride (g-C3N4) holds a great promise for sustainable and cost-effective H2O2 production, but the high carrier recombination rate impedes its efficiency. To tackle this challenge, we propose an innovative method involving multispecies iodine mediators (I-/I3-) intercalation through a pre-photo-oxidation process using potassium iodide (suspected deteriorated "KI") within the g-C3N4 framework. Moreover, we introduce an external electric field by incorporating cationic methyl viologen ions to establish an auxiliary electron transfer channel. Such a unique design drastically improves the separation of photo-generated carriers, achieving an impressive H2O2 production rate of 46.40 mmol g-1 h-1 under visible light irradiation, surpassing the most visible-light H2O2-producing systems. Combining various advanced characterization techniques elucidates the inner photocatalytic mechanism, and the application potential of this photocatalytic system is validated with various simulation scenarios. This work presents a significative strategy for preparing and applying highly efficient g-C3N4-based catalysts in photochemical H2O2 production.
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Affiliation(s)
- Chang-Wei Bai
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, College of Environment and Ecology, Chongqing University, Chongqing, 400045, China
| | - Lian-Lian Liu
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Environmental Science and Engineering, University of Science and Technology of China, Hefei, 230026, China
| | - Jie-Jie Chen
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Environmental Science and Engineering, University of Science and Technology of China, Hefei, 230026, China
| | - Fei Chen
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, College of Environment and Ecology, Chongqing University, Chongqing, 400045, China.
| | - Zhi-Quan Zhang
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, College of Environment and Ecology, Chongqing University, Chongqing, 400045, China
| | - Yi-Jiao Sun
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, College of Environment and Ecology, Chongqing University, Chongqing, 400045, China
| | - Xin-Jia Chen
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, College of Environment and Ecology, Chongqing University, Chongqing, 400045, China
| | - Qi Yang
- Key Laboratory of Environmental Biology and Pollution Control, Ministry of Education, College of Environmental Science and Engineering, Hunan University, Changsha, 410082, China
| | - Han-Qing Yu
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Environmental Science and Engineering, University of Science and Technology of China, Hefei, 230026, China.
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14
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Yu H, Zhang F, Chen Q, Zhou PK, Xing W, Wang S, Zhang G, Jiang Y, Chen X. Vinyl-Group-Anchored Covalent Organic Framework for Promoting the Photocatalytic Generation of Hydrogen Peroxide. Angew Chem Int Ed Engl 2024; 63:e202402297. [PMID: 38488772 DOI: 10.1002/anie.202402297] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2024] [Indexed: 04/17/2024]
Abstract
The artificial photosynthesis of H2O2 from water and oxygen using semiconductor photocatalysts is attracting increasing levels of attention owing to its green, environmentally friendly, and energy-saving characteristics. Although covalent organic frameworks (COFs) are promising materials for promoting photocatalytic H2O2 production owing to their structural and functional diversity, they typically suffer from low charge-generation and -transfer efficiencies as well as rapid charge recombination, which restricts their use as catalysts for photocatalytic H2O2 production. Herein, we report a strategy for anchoring vinyl moieties to a COF skeleton to facilitate charge separation and migration, thereby promoting photocatalytic H2O2 generation. This vinyl-group-bearing COF photocatalyst exhibits a H2O2-production rate of 84.5 μmol h-1 (per 10 mg), which is ten-times higher than that of the analog devoid of vinyl functionality and superior to most reported COF photocatalysts. Both experimental and theoretical studies provide deep insight into the origin of the improved photocatalytic performance. These findings are expected to facilitate the rational design and modification of organic semiconductors for use in photocatalytic applications.
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Affiliation(s)
- Hong Yu
- State Key Laboratory of Photocatalysis on Energy and Environment, and Key Laboratory of Molecular Synthesis and Function Discovery, College of Chemistry, Fuzhou University, Fuzhou, 350116, P. R. China
| | - Fengtao Zhang
- State Key Laboratory of Photocatalysis on Energy and Environment, and Key Laboratory of Molecular Synthesis and Function Discovery, College of Chemistry, Fuzhou University, Fuzhou, 350116, P. R. China
| | - Qian Chen
- State Key Laboratory of Photocatalysis on Energy and Environment, and Key Laboratory of Molecular Synthesis and Function Discovery, College of Chemistry, Fuzhou University, Fuzhou, 350116, P. R. China
| | - Pan-Ke Zhou
- State Key Laboratory of Photocatalysis on Energy and Environment, and Key Laboratory of Molecular Synthesis and Function Discovery, College of Chemistry, Fuzhou University, Fuzhou, 350116, P. R. China
| | - Wandong Xing
- State Key Laboratory of Photocatalysis on Energy and Environment, and Key Laboratory of Molecular Synthesis and Function Discovery, College of Chemistry, Fuzhou University, Fuzhou, 350116, P. R. China
| | - Sibo Wang
- State Key Laboratory of Photocatalysis on Energy and Environment, and Key Laboratory of Molecular Synthesis and Function Discovery, College of Chemistry, Fuzhou University, Fuzhou, 350116, P. R. China
| | - Guigang Zhang
- State Key Laboratory of Photocatalysis on Energy and Environment, and Key Laboratory of Molecular Synthesis and Function Discovery, College of Chemistry, Fuzhou University, Fuzhou, 350116, P. R. China
| | - Yi Jiang
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620, P. R. China
| | - Xiong Chen
- State Key Laboratory of Photocatalysis on Energy and Environment, and Key Laboratory of Molecular Synthesis and Function Discovery, College of Chemistry, Fuzhou University, Fuzhou, 350116, P. R. China
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15
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Li X, Wang H, Li S, Xu Y, Bian Z. Doping and defects in carbon nitride cause efficient in situ H 2O 2 synthesis to allow efficient photocatalytic sterilization. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 926:172109. [PMID: 38556021 DOI: 10.1016/j.scitotenv.2024.172109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2024] [Revised: 03/28/2024] [Accepted: 03/28/2024] [Indexed: 04/02/2024]
Abstract
In situ photocatalytic synthesis of H2O2 for disinfection has attracted widespread attention because it is a clean and environmentally friendly sterilization method. Graphitic carbon nitride has been used as a very selective photocatalyst for H2O2 generation but has some limitations (e.g., insufficient light absorption, rapid electron-hole recombination, and slow direct two-electron reduction processes) that prevent efficient H2O2 production. In this study, potassium-doped graphite carbon nitride with nitrogen vacancies (NDKCN) was prepared using a simple method involving a thermal fusion salt and N2 calcination, which possessed an ultrathin nanosheet structure (1.265 nm) providing abundant active sites. Synergistic effects caused by nitrogen vacancies and K+ and I- doping in the NDKCN photocatalyst gave the NDKCN a good ability to absorb light, undergo fast charge transfer, and give a high photoelectric current response. The optimized photocatalytic H2O2 yield of the NDKCN was 780.1 μM·g-1·min-1, which was 10 times the yield of the pristine g-C3N4. Tests involving quenching reactive species, electron spin resonance, and rotating disk electrodes indicated that one-step two-electron direct reduction on the NDKCN caused excellent H2O2 generation performance. The ability to efficiently generate H2O2 in situ gave NDKCN an excellent bactericidal performance, and 7.3 log10 (colony-forming units·mL-1) of Escherichia coli were completely eliminated within 80 min. Scanning electron microscopy images before and after sterilization indicated the changes in bacteria caused by the catalytic activity. The new g-C3N4-based photocatalyst and similar rationally designed photocatalysts with doping and defects offer efficient and simple in situ H2O2 sterilization.
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Affiliation(s)
- Xinyu Li
- Beijing Key Lab for Source Control Technology of Water Pollution, College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China; Engineering Research Center for Water Pollution Source Control & Eco-remediation, College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China
| | - Hui Wang
- Beijing Key Lab for Source Control Technology of Water Pollution, College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China; Engineering Research Center for Water Pollution Source Control & Eco-remediation, College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China.
| | - Shunlin Li
- Beijing Key Lab for Source Control Technology of Water Pollution, College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China; Engineering Research Center for Water Pollution Source Control & Eco-remediation, College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China
| | - Ye Xu
- Beijing Key Lab for Source Control Technology of Water Pollution, College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China; Engineering Research Center for Water Pollution Source Control & Eco-remediation, College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China
| | - Zhaoyong Bian
- College of Water Sciences, Beijing Normal University, Beijing 100875, China
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16
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Fang X, Huang X, Hu Q, Li B, Hu C, Ma B, Ding Y. Recent developments in photocatalytic production of hydrogen peroxide. Chem Commun (Camb) 2024; 60:5354-5368. [PMID: 38690680 DOI: 10.1039/d4cc01577k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/02/2024]
Abstract
Hydrogen peroxide (H2O2), an environmentally friendly strong oxidant and energy carrier, has attracted widespread attention in photocatalysis. Artificial photosynthesis of H2O2 using water and oxygen as raw materials, solar energy as an energy source, and semiconductor materials as catalysts is considered a promising technology. In the past few decades, encouraging progress has been made in the photocatalytic production of H2O2. Therefore, we summarize the research achievements in this field in recent years. This review first briefly introduces the reaction pathway, detection techniques and evaluation metrics. Then, the recent advances in photocatalysts are highlighted. Furthermore, the existing challenges and possible solutions in this field are presented. At last, we look forward to the future development direction of this field. This review provides valuable insights and guidance for efficient photocatalytic H2O2 production.
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Affiliation(s)
- Xiao Fang
- State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Advanced Catalysis of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, 222 Tianshui South Road, Lanzhou 730000, China.
| | - Xi Huang
- State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Advanced Catalysis of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, 222 Tianshui South Road, Lanzhou 730000, China.
| | - Qiyu Hu
- State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Advanced Catalysis of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, 222 Tianshui South Road, Lanzhou 730000, China.
| | - Bonan Li
- State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Advanced Catalysis of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, 222 Tianshui South Road, Lanzhou 730000, China.
| | - Chunlian Hu
- State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Advanced Catalysis of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, 222 Tianshui South Road, Lanzhou 730000, China.
| | - Baochun Ma
- State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Advanced Catalysis of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, 222 Tianshui South Road, Lanzhou 730000, China.
| | - Yong Ding
- State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Advanced Catalysis of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, 222 Tianshui South Road, Lanzhou 730000, China.
- State Key Laboratory of Low Carbon Catalysis and Carbon Dioxide Utilization, State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, 18 Tianshui Middle Road, Lanzhou 730000, China
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17
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Li M, Cen P, Huang L, Yan J, Zhou S, Yeung KL, Mo CH, Zhang H. Iron complex regulated synergistic effect between the current and peroxymonosulfate enhanced ultrafast oxidation of perfluorooctanoic acid via free radical dominant electrochemical reaction. JOURNAL OF HAZARDOUS MATERIALS 2024; 470:134155. [PMID: 38552391 DOI: 10.1016/j.jhazmat.2024.134155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/02/2024] [Revised: 03/09/2024] [Accepted: 03/26/2024] [Indexed: 04/25/2024]
Abstract
Iron complex regulated electrochemical reaction was triggered for revealing the reaction mechanism, degradation pathway, and applied potential of perfluorooctanoic acid (PFOA). The increased PMS concentrations, electrode spacing, and current density significantly enhanced PFOA elimination, with current density exhibiting a relatively strong interdependency to PFOA complete mineralization. The synergy between PMS and electrochemical reactions greatly accelerated PFOA decomposition by promoting the generation of key reaction sites, such as those for PMS activation and electrochemical processes, under various conditions. Furthermore, density functional theory calculations confirmed that the reciprocal transformation of Fe2+ and Fe3+ complexes was feasible under the electrochemical effect, further promoting the generation of active sites. The developed electrochemical oxidation with PMS reaction (EO/PMS) system can rapidly decompose and mineralize PFOA while maintaining strong tolerance to changing water matrices and organic and inorganic ions. Overall, it holds promise for use in treating and purifying wastewater containing PFOA.
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Affiliation(s)
- Meng Li
- School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, PR China; Department of Chemical and Biological Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, PR China.
| | - Peitong Cen
- School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, PR China
| | - Lei Huang
- School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, PR China
| | - Jia Yan
- School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, PR China
| | - Shaoqi Zhou
- College of Resources and Environmental Engineering, Guizhou University, 2708 Huaxi Road, Guiyang 550025, PR China
| | - King Lun Yeung
- Department of Chemical and Biological Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, PR China
| | - Ce-Hui Mo
- Guangdong Provincial Research Center for Environment Pollution Control and Remediation Materials, College of Life Science and Technology, Jinan University, Guangzhou 510632, PR China
| | - Hongguo Zhang
- School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, PR China; Guangzhou University-Linköping University Research Center on Urban Sustainable Development, Guangzhou University, Guangzhou 510006, PR China.
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18
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Feng B, Liu Y, Wan K, Zu S, Pei Y, Zhang X, Qiao M, Li H, Zong B. Tailored Exfoliation of Polymeric Carbon Nitride for Photocatalytic H 2O 2 Production and CH 4 Valorization Mediated by O 2 Activation. Angew Chem Int Ed Engl 2024; 63:e202401884. [PMID: 38376362 DOI: 10.1002/anie.202401884] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2024] [Accepted: 02/20/2024] [Indexed: 02/21/2024]
Abstract
The exfoliation of bulk C3N4 (BCN) into ultrathin layered structure is an effective strategy to boost photocatalytic efficiency by exposing interior active sites and accelerating charge separation and transportation. Herein, we report a novel nitrate anion intercalation-decomposition (NID) strategy that is effective in peeling off BCN into few-layer C3N4 (fl-CN) with tailored thickness down to bi-layer. This strategy only involves hydrothermal treatment of BCN in diluted HNO3 aqueous solution, followed by pyrolysis at various temperatures. The decomposition of the nitrate anions not only exfoliates BCN and changes the band structure, but also incorporates oxygen species onto fl-CN, which is conducive to O2 adsorption and hence relevant chemical processes. In photocatalytic O2 reduction under visible light irradiation, the H2O2 production rate over the optimal fl-CN-530 catalyst is 952 μmol g-1 h-1, which is 8.8 times that over BCN. More importantly, under full arc irradiation and in the absence of hole scavenger, CH4 can be photocatalytically oxidized by on-site formed H2O2 and active oxygen species to generate value-added C1 oxygenates with high selectivity of 99.2 % and record-high production rate of 1893 μmol g-1 h-1 among the metal-free C3N4-based photocatalysts.
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Affiliation(s)
- Bo Feng
- Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai, 200438, P. R. China
| | - Yanan Liu
- Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai, 200438, P. R. China
| | - Kun Wan
- Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai, 200438, P. R. China
| | - Sijie Zu
- Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai, 200438, P. R. China
| | - Yan Pei
- Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai, 200438, P. R. China
| | - Xiaoxin Zhang
- State Key Laboratory of Catalytic Materials and Chemical Engineering, Research Institute of Petroleum Processing, SINOPEC, Beijing, 100083, P. R. China
| | - Minghua Qiao
- Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai, 200438, P. R. China
| | - Hexing Li
- Key Laboratory of Resource Chemistry of Ministry of Education, Shanghai Key Laboratory of Rare Earth Functional Materials, College of Chemistry and Materials Science, Shanghai Normal University, Shanghai, 200234, P. R. China
| | - Baoning Zong
- State Key Laboratory of Catalytic Materials and Chemical Engineering, Research Institute of Petroleum Processing, SINOPEC, Beijing, 100083, P. R. China
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19
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Wang X, Jin Y, Li N, Zhang H, Liu X, Yang X, Pan H, Wang T, Wang K, Qi D, Jiang J. 12 Connecting Sites Linked Three-dimensional Covalent Organic Frameworks with Intrinsic Non-interpenetrated shp Topology for Photocatalytic H 2O 2 Synthesis. Angew Chem Int Ed Engl 2024; 63:e202401014. [PMID: 38334002 DOI: 10.1002/anie.202401014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Revised: 02/07/2024] [Accepted: 02/09/2024] [Indexed: 02/10/2024]
Abstract
Developing high connectivity (>8) three-dimensional (3D) covalent organic frameworks (COFs) towards new topologies and functions remains a great challenge owing to the difficulty in getting high connectivity organic building blocks. This however represents the most important step towards promoting the diversity of COFs due to the still limited dynamic covalent bonds available for constructing COFs at this stage. Herein, highly connected phthalocyanine-based (Pc-based) 3D COFs MPc-THHI-COFs (M=H2, Ni) were afforded from the reaction between 2,3,9,10,16,17,23,24-octacarboxyphthalocyanine M(TAPc) (M=H2, Ni) and 5,5',5'',5''',5'''',5'''''-(triphenylene-2,3,6,7,10,11-hexayl)hexa(isophthalohydrazide) (THHI) with 12 connecting sites. Powder X-ray diffraction analysis together with theoretical simulations and transmission electron microscopy reveals their crystalline nature with an unprecedented non-interpenetrated shp topology. Experimental and theoretical investigations disclose the broadened visible light absorption range and narrow optical band gap of MPc-THHI-COFs. This in combination with their 3D nanochannels endows them with efficient photocatalysis performance for H2O2 generation from O2 and H2O via 2e- oxygen reduction reaction and 2e- water oxidation reaction under visible-light irradiation (λ >400 nm). This work provides valuable result for the development of high connectivity functional COFs towards diverse application potentials.
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Affiliation(s)
- Xinxin Wang
- Beijing Advanced Innovation Center for Materials Genome Engineering, Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials, Department of Chemistry and Chemical Engineering, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Yucheng Jin
- Beijing Advanced Innovation Center for Materials Genome Engineering, Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials, Department of Chemistry and Chemical Engineering, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Ning Li
- Beijing Advanced Innovation Center for Materials Genome Engineering, Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials, Department of Chemistry and Chemical Engineering, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Hao Zhang
- Beijing Advanced Innovation Center for Materials Genome Engineering, Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials, Department of Chemistry and Chemical Engineering, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Xiaolin Liu
- Beijing Advanced Innovation Center for Materials Genome Engineering, Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials, Department of Chemistry and Chemical Engineering, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Xiya Yang
- Beijing Advanced Innovation Center for Materials Genome Engineering, Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials, Department of Chemistry and Chemical Engineering, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Houhe Pan
- Beijing Advanced Innovation Center for Materials Genome Engineering, Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials, Department of Chemistry and Chemical Engineering, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Tianyu Wang
- Beijing Advanced Innovation Center for Materials Genome Engineering, Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials, Department of Chemistry and Chemical Engineering, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Kang Wang
- Beijing Advanced Innovation Center for Materials Genome Engineering, Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials, Department of Chemistry and Chemical Engineering, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Dongdong Qi
- Beijing Advanced Innovation Center for Materials Genome Engineering, Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials, Department of Chemistry and Chemical Engineering, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Jianzhuang Jiang
- Beijing Advanced Innovation Center for Materials Genome Engineering, Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials, Department of Chemistry and Chemical Engineering, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing, 100083, China
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20
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Li Y, Guo Y, Fan G, Luan D, Gu X, Lou XWD. Single Zn Atoms with Acetate-Anion-Enabled Asymmetric Coordination for Efficient H 2 O 2 Photosynthesis. Angew Chem Int Ed Engl 2024; 63:e202317572. [PMID: 38116911 DOI: 10.1002/anie.202317572] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2023] [Revised: 12/15/2023] [Accepted: 12/19/2023] [Indexed: 12/21/2023]
Abstract
Exploring unique single-atom sites capable of efficiently reducing O2 to H2 O2 while being inert to H2 O2 decomposition under light conditions is significant for H2 O2 photosynthesis, but it remains challenging. Herein, we report the facile design and fabrication of polymeric carbon nitride (CN) decorated with single-Zn sites that have tailorable local coordination environments, which is enabled by utilizing different Zn salt anions. Specifically, the O atom from acetate (OAc) anion participates in the coordination of single-Zn sites on CN, forming asymmetric Zn-N3 O moiety on CN (denoted as CN/Zn-OAc), in contrast to the obtained Zn-N4 sites when sulfate (SO4 ) is adopted (CN/Zn-SO4 ). Both experimental and theoretical investigations demonstrate that the Zn-N3 O moiety exhibits higher intrinsic activity for O2 reduction to H2 O2 than the Zn-N4 moiety. This is attributed to the asymmetric N/O coordination, which promotes the adsorption of O2 and the formation of the key intermediate *OOH on Zn sites due to their modulated electronic structure. Moreover, it is inactive for H2 O2 decomposition under both dark and light conditions. As a result, the optimized CN/Zn-OAc catalyst exhibits significantly improved photocatalytic H2 O2 production activity under visible light irradiation.
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Affiliation(s)
- Yunxiang Li
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore
| | - Yan Guo
- School of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, 010021, China
| | - Guilan Fan
- School of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, 010021, China
| | - Deyan Luan
- Department of Chemistry, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, 999077, Hong Kong, China
| | - Xiaojun Gu
- School of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, 010021, China
| | - Xiong Wen David Lou
- Department of Chemistry, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, 999077, Hong Kong, China
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21
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Zhuang C, Chang Y, Li W, Li S, Xu P, Zhang H, Zhang Y, Zhang C, Gao J, Chen G, Zhang T, Kang Z, Han X. Light-Induced Variation of Lithium Coordination Environment in g-C 3N 4 Nanosheet for Highly Efficient Oxygen Reduction Reactions. ACS NANO 2024. [PMID: 38294412 DOI: 10.1021/acsnano.4c00217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2024]
Abstract
The structure and electronic state of the active center in a single-atom catalyst undergo noticeable changes during a dynamic catalytic process. The metal atom active center is not well demonstrated in a dynamic manner. This study demonstrated that Li metal atoms, serving as active centers, can migrate on a C3N4 monolayer or between C3N4 monolayers when exposed to light irradiation. This migration alters the local coordination environment of Li in the C3N4 nanosheets, leading to a significant enhancement in photocatalytic activity. The photocatalytic H2O2 process could be maintained for 35 h with a 920 mmol/g record-high yield, corresponding to a 0.4% H2O2 concentration, which is far greater than the value (0.1%) of practical application for wastewater treatment. Density functional theory calculations indicated that dynamic Li-coordinated structures contributed to the superhigh photocatalytic activity.
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Affiliation(s)
- Chunqiang Zhuang
- Institute of Microstructure and Property of Advanced Materials, Beijing University of Technology, Beijing 100124, People's Republic of China
| | - Yuan Chang
- Laboratory of Materials Modification by Laser Ion and Electron Beams (Dalian University of Technology), Ministry of Education, Dalian 116024, People's Republic of China
| | - Weiming Li
- Institute of Microstructure and Property of Advanced Materials, Beijing University of Technology, Beijing 100124, People's Republic of China
| | - Shijie Li
- Key Laboratory of Health Risk Factors for Seafood of Zhejiang Province, National Engineering Research Center for Marine Aquaculture, College of Marine Science and Technology, Zhejiang Ocean University, Zhoushan 316022, Zhejiang, People's Republic of China
| | - Peng Xu
- National Center for Nanoscience and Technology, Beijing 100190, People's Republic of China
| | - Hang Zhang
- Institute of Microstructure and Property of Advanced Materials, Beijing University of Technology, Beijing 100124, People's Republic of China
| | - Yihong Zhang
- Institute of Microstructure and Property of Advanced Materials, Beijing University of Technology, Beijing 100124, People's Republic of China
| | - Can Zhang
- Institute of Microstructure and Property of Advanced Materials, Beijing University of Technology, Beijing 100124, People's Republic of China
| | - Junfeng Gao
- Laboratory of Materials Modification by Laser Ion and Electron Beams (Dalian University of Technology), Ministry of Education, Dalian 116024, People's Republic of China
| | - Ge Chen
- Beijing Key Laboratory for Green Catalysis and Separation, Faculty of Environment and Life Science, Beijing University of Technology, Beijing 100124, People's Republic of China
| | - Tianyang Zhang
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-based Functional Materials and Devices, Soochow University, Suzhou 215123, People's Republic of China
| | - Zhenhui Kang
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-based Functional Materials and Devices, Soochow University, Suzhou 215123, People's Republic of China
- Macao Institute of Materials Science and Engineering (MIMSE), MUST-SUDA Joint Research Center for Advanced Functional Materials, Macau University of Science and Technology, Taipa 999078, Macao, People's Republic of China
| | - Xiaodong Han
- Institute of Microstructure and Property of Advanced Materials, Beijing University of Technology, Beijing 100124, People's Republic of China
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Jing L, Xu Y, Xie M, Li Z, Wu C, Zhao H, Zhong N, Wang J, Wang H, Yan Y, Li H, Hu J. Cyano-Rich g-C 3 N 4 in Photochemistry: Design, Applications, and Prospects. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2304404. [PMID: 37670529 DOI: 10.1002/smll.202304404] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Revised: 07/18/2023] [Indexed: 09/07/2023]
Abstract
Cyano-rich g-C3 N4 materials are widely used in various fields of photochemistry due to the very powerful electron-absorbing ability and electron storage function of cyano, as well as its advantages in improving light absorption, adjusting the energy band structure, increasing the polarization rate and electron density in the structure, active site concentration, and promoting oxygen activation ability. Notwithstanding, there is yet a huge knowledge break in the design, preparation, detection, application, and prospect of cyano-rich g-C3 N4 . Accordingly, an overall review is arranged to substantially comprehend the research progress and position of cyano-rich g-C3 N4 materials. An overall overview of the current research position in the synthesis, characterization (determination of their location and quantity), application, and reaction mechanism analysis of cyano-rich g-C3 N4 materials to provide a quantity of novel suggestions for cyano-modified carbon nitride materials' construction is provided. In view of the prevailing challenges and outlooks of cyano-rich g-C3 N4 materials, this paper will purify the growth direction of cyano-rich g-C3 N4 , to achieve a more in-depth exploration and broaden the applications of cyano-rich g-C3 N4 .
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Affiliation(s)
- Liquan Jing
- Department of Chemical and Petroleum Engineering, University of Calgary, 2500 University Drive, NW, Calgary, Alberta, T2N 1N4, Canada
| | - Yuanguo Xu
- School of Chemistry and Chemical Engineering, School of Pharmacy, Jiangsu University, Zhenjiang, 212013, P. R. China
| | - Meng Xie
- School of Chemistry and Chemical Engineering, School of Pharmacy, Jiangsu University, Zhenjiang, 212013, P. R. China
| | - Zheng Li
- Department of Chemical and Petroleum Engineering, University of Calgary, 2500 University Drive, NW, Calgary, Alberta, T2N 1N4, Canada
| | - Chongchong Wu
- CNOOC Institute of Chemicals & Advanced Materials (CICM), Beijing, 102200, P. R. China
| | - Heng Zhao
- Department of Chemical and Petroleum Engineering, University of Calgary, 2500 University Drive, NW, Calgary, Alberta, T2N 1N4, Canada
| | - Na Zhong
- Department of Chemical and Petroleum Engineering, University of Calgary, 2500 University Drive, NW, Calgary, Alberta, T2N 1N4, Canada
| | - Jiu Wang
- Department of Chemical and Petroleum Engineering, University of Calgary, 2500 University Drive, NW, Calgary, Alberta, T2N 1N4, Canada
| | - Hui Wang
- Department of Chemical and Petroleum Engineering, University of Calgary, 2500 University Drive, NW, Calgary, Alberta, T2N 1N4, Canada
| | - Yubo Yan
- Department of Chemical and Petroleum Engineering, University of Calgary, 2500 University Drive, NW, Calgary, Alberta, T2N 1N4, Canada
- Jiangsu Engineering Laboratory for Environment Functional Materials, School of Chemistry and Chemical Engineering, Huaiyin Normal University, Huai'an, 223300, P. R. China
| | - Huaming Li
- Institute for Energy Research, Jiangsu University, Zhenjiang, 212013, P. R. China
| | - Jinguang Hu
- Department of Chemical and Petroleum Engineering, University of Calgary, 2500 University Drive, NW, Calgary, Alberta, T2N 1N4, Canada
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23
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Chen L, Li M, Xiao Q, Yang Y, Huang P, Qiu X. Highly Hydrophilic and Defective Carbon Nitride for Enhanced Photocatalytic Hydrogen Evolution. J Phys Chem Lett 2023; 14:11704-11714. [PMID: 38109496 DOI: 10.1021/acs.jpclett.3c02877] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2023]
Abstract
Graphitic carbon nitride (g-C3N4), as a kind of nonmetallic low-cost photocatalyst, has great potential in photocatalytic hydrogen (H2) evolution, but its poor hydrophilicity and nonwetting extremely limit its H2 evolution efficiency. Herein, highly hydrophilic and defective g-C3N4 photocatalysts (NH3-CN-P as a representative example) have been fabricated on the basis of the strategy of joint phosphorus doping and ammonia stripping. The dopant of phosphorus prefers to occupy the C atoms bonded to -NH2 groups in the g-C3N4 skeleton, which is conducive to the formation of N defects caused by the effects of electronegativity and charge balance. Moreover, ammonia stripping plays a dual role in exposing plentiful two-dimensional defective planar structure and implanting the hydrophilic groups on the surface. As expected, the photocatalytic H2 evolution property of NH3-CN-P reaches 11.31 mmol g-1 h-1, with an apparent quantum yield of 17.9% at 420 nm, outperforming the majority of the reported g-C3N4-based photocatalysts.
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Affiliation(s)
- Long Chen
- College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan 410083, P. R. China
| | - Miao Li
- College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan 410083, P. R. China
| | - Qinqin Xiao
- College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan 410083, P. R. China
| | - Ying Yang
- College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan 410083, P. R. China
| | - Peixian Huang
- School of Data Science, Chinese University of Hong Kong, Shenzhen 518172, P. R. China
| | - Xiaoqing Qiu
- College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan 410083, P. R. China
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24
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Wu Y, Deng X, Cui R, Song M, Guo X, Gong X, He J, Chen P. Electronic configuration inversion in CdIn 2S 4 for efficient photocatalytic hydrogen peroxide generation coupled with selective benzylamine oxidation. J Colloid Interface Sci 2023; 656:528-537. [PMID: 38007944 DOI: 10.1016/j.jcis.2023.11.118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2023] [Revised: 11/01/2023] [Accepted: 11/18/2023] [Indexed: 11/28/2023]
Abstract
Vacancies engineering has sparked a huge interest in enhancing photocatalytic activity, but monovacancy simultaneously conducts as either electron or hole acceptor and redox reaction, worsening charge transfer and catalytic performance. Here, the concept of electronic inversion has been proposed through the simultaneous introduction of surface oxygen and S vacancies in CdIn2S4 (OSv-CIS). Consequently, under mild conditions, the well-designed OSv-CIS-200 demonstrated a strong rate of N-benzylidenebenzylamine production (2972.07 µmol g-1 h-1) coupled with Hydrogen peroxide (H2O2) synthesis (2362.33 µmol g-1 h-1) (PIH), which is 12.4 times higher than that of CdIn2S4. Density functional theory (DFT) simulation and characterization studies demonstrate that oxygen is introduced into the lattice on the surface of the material, reversing the charge distribution of the S vacancy and enhancing the polarity of the total charge distribution. It not only provides a huge built-in electric field (BEF) for guiding the orientation of the charge transfer, but also acts as a long-distance active site to accelerate reaction and prevent H2O2 decomposition. Our work offers a straightforward connection between the atomic defect and intrinsic properties for designing high-efficiency materials.
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Affiliation(s)
- Yubo Wu
- College of Big Data and Information Engineering, State Key Laboratory of Public Big Data, Guizhou University, Guiyang 550025, Guizhou, China; Provincial Guizhou Key Laboratory of Green Chemical and Clean Energy Technology, State Key Laboratory of Public Big Data, School of Chemistry and Chemical Engineering, Guizhou University, Guiyang 550025, Guizhou, China
| | - Xiaoxu Deng
- College of Big Data and Information Engineering, State Key Laboratory of Public Big Data, Guizhou University, Guiyang 550025, Guizhou, China
| | - Ruirui Cui
- College of Big Data and Information Engineering, State Key Laboratory of Public Big Data, Guizhou University, Guiyang 550025, Guizhou, China.
| | - Meiyang Song
- Provincial Guizhou Key Laboratory of Green Chemical and Clean Energy Technology, State Key Laboratory of Public Big Data, School of Chemistry and Chemical Engineering, Guizhou University, Guiyang 550025, Guizhou, China
| | - Xiang Guo
- College of Big Data and Information Engineering, State Key Laboratory of Public Big Data, Guizhou University, Guiyang 550025, Guizhou, China.
| | - Xingyong Gong
- College of Big Data and Information Engineering, State Key Laboratory of Public Big Data, Guizhou University, Guiyang 550025, Guizhou, China
| | - Jie He
- Key Laboratory of Catalysis and Energy Materials, Chemistry of Ministry of Education & Hubei Key Laboratory of Catalysis and Materials Science, South-Central Minzu University, Wuhan, 430074, China.
| | - Peng Chen
- Provincial Guizhou Key Laboratory of Green Chemical and Clean Energy Technology, State Key Laboratory of Public Big Data, School of Chemistry and Chemical Engineering, Guizhou University, Guiyang 550025, Guizhou, China.
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25
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Wen S, Zi L, Liu Y, Wang B, Zhang K, Tang S, Li Y. A quadruple-strategy of modification on carbon nitride boosts oxygen reduction for high performance photocatalytic hydrogen peroxide production. J Colloid Interface Sci 2023; 656:80-92. [PMID: 37984173 DOI: 10.1016/j.jcis.2023.11.081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Revised: 10/22/2023] [Accepted: 11/13/2023] [Indexed: 11/22/2023]
Abstract
This paper reports a quadruple-strategy for material design, simultaneously applying morphology control, group modification, defect engineering and alkali metal doping to the design of catalysts, and successfully constructing irregular clusters of carbon nitride (pMNK-CN) with excellent photogenerated carrier separation performance and structural stability. The pMNK-CN is an irregular flower cluster-like morphology with a nanosheet structure on the surface, and the repolymerization process of the prepolymer in the microvoid of the metal salt gives it an open pore structure. With the help of essential characterization, it was confirmed that the heptazine unit in the backbone underwent partial decomposition due to the etching of metal salts at high temperatures, reducing the overall polymerization and introducing cyano and nitrogen vacancies. Meanwhile, the potassium ion embedded in the lattice can induce the growth of ordered structures and thus improve the short-range order. The pMNK-CN possesses a hydrogen peroxide production efficiency of 240.0 μmol·g-1·h-1 in pure water, which is 31 times higher than that of bulk carbon nitride. And the apparent quantum efficiencies of pMNK-CN in the 380 and 420 nm bands are 17.5 % and 14.8 % in the presence of isopropanol. The effects of each modification strategies on the electronic structure of carbon nitride were investigated using First-Principles, and it was demonstrated that the multiple modification strategies synergistically enhanced the optical absorption, photogenerated charge separation efficiency, and lowered the reaction energy barrier, thus greatly contributing to the oxygen reduction to hydrogen peroxide performance.
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Affiliation(s)
- Sha Wen
- Hunan Province Key Laboratory of Mineral Cleaner Production And Green Functional Materials, college of chemistry and chemical engineering, Jishou University, Jishou 416000, Hunan, PR China
| | - Ling Zi
- Hunan Province Key Laboratory of Mineral Cleaner Production And Green Functional Materials, college of chemistry and chemical engineering, Jishou University, Jishou 416000, Hunan, PR China
| | - Ying Liu
- School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, PR China
| | - Bo Wang
- Hunan Province Key Laboratory of Mineral Cleaner Production And Green Functional Materials, college of chemistry and chemical engineering, Jishou University, Jishou 416000, Hunan, PR China
| | - Kexin Zhang
- Hunan Province Key Laboratory of Mineral Cleaner Production And Green Functional Materials, college of chemistry and chemical engineering, Jishou University, Jishou 416000, Hunan, PR China
| | - Senpei Tang
- Hunan Province Key Laboratory of Mineral Cleaner Production And Green Functional Materials, college of chemistry and chemical engineering, Jishou University, Jishou 416000, Hunan, PR China.
| | - Youji Li
- Hunan Province Key Laboratory of Mineral Cleaner Production And Green Functional Materials, college of chemistry and chemical engineering, Jishou University, Jishou 416000, Hunan, PR China
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26
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Zhang Y, Cao Q, Meng A, Wu X, Xiao Y, Su C, Zhang Q. Molecular Heptazine-Triazine Junction over Carbon Nitride Frameworks for Artificial Photosynthesis of Hydrogen Peroxide. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2306831. [PMID: 37775094 DOI: 10.1002/adma.202306831] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Revised: 09/15/2023] [Indexed: 10/01/2023]
Abstract
Revealing the photocatalytic mechanism between various junctions and catalytic activities has become a hotspot in photocatalytic systems. Herein, an internal molecular heptazine/triazine (H/T) junction in crystalline carbon nitride (HTCN) is constructed and devoted to selective two-electron oxygen reduction reaction (2e- ORR) for efficient hydrogen peroxide (H2 O2 ) production. In-situ X-ray diffraction spectra under various temperatures authenticate the successful formation of molecular H/T junction in HTCN during the calcining process rather than physically mixing. The increased surface photovoltage and transient photovoltage signals, and the decreased exciton binding energy undoubtably elucidate that an obvious increasement of carrier density and diffusion capability of photogenerated electrons are realized over HTCN. Additionally, the analyses of in situ photoirradiated Kelvin probe force microscopy and femto-second transient absorption spectra reveal the successful construction of the strong internal built-in-electric field and the existence of the majority of long-lived shallow trapped electrons associated with molecular H/T junction over HTCN, respectively. Benefiting from these, the photocatalytic results exhibit an incredible improvement (96.5-fold) for H2 O2 production. This novel work provides a comprehensive understanding of the long-lived reactive charges in molecular H/T junctions for strengthening the driving-force for photocatalytic H2 O2 production, which opens potential applications for enhancing PCN-based photocatalytic redox reactions.
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Affiliation(s)
- Yunxiao Zhang
- International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry Education, Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen, 518060, P. R. China
- College of Light Chemical Industry and Materials Engineering, Shunde Polytechnic, Foshan, 528300, P. R. China
| | - Qingxiang Cao
- College of Light Chemical Industry and Materials Engineering, Shunde Polytechnic, Foshan, 528300, P. R. China
| | - Aiyun Meng
- College of New Materials and New Energies, Shenzhen Technology University, Shenzhen, 518118, P. R. China
| | - Xuelian Wu
- College of Materials Science and Engineering, Shenzhen University, Shenzhen, 518060, P. R. China
| | - Yonghao Xiao
- International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry Education, Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen, 518060, P. R. China
| | - Chenliang Su
- International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry Education, Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen, 518060, P. R. China
| | - Qitao Zhang
- International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry Education, Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen, 518060, P. R. China
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27
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Zhang Z, Zhao H, Wang Z, Hu Z, Wang Q, Meng E, Lai S, Ying J, Li H, Wu C. Strategies for promoting the degradation of phenol by electro-Fenton: Simultaneously promoting the generation and utilization of H 2O 2. ENVIRONMENTAL RESEARCH 2023; 236:116794. [PMID: 37527749 DOI: 10.1016/j.envres.2023.116794] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Revised: 07/14/2023] [Accepted: 07/28/2023] [Indexed: 08/03/2023]
Abstract
The use of the electro-Fenton process to continuously generate H2O2 and efficiently degrade organic pollutants is considered a promising technology. The ratio of generation of H2O2 is usually regarded as the critical step; however, how the H2O2 is utilized is also of particular importance. Herein, activated carbon was activated at different temperatures and used to explore the effect of nitrogen doping on the production and utilization of H2O2 in the electro-Fenton-based degradation of organic pollutants. The experimental results indicate that nitrogen-doped activated carbon simultaneously promotes the generation and utilization of H2O2, which is attributed to the regulation of the competition between phenol and O2 adsorption by the doped nitrogen. Nitrogen doping not only improves 2e-ORR selectivity but also aggregates phenol near the cathode to balance the concentrations of phenol and ·OH. Density functional theory (DFT) calculations further confirmed that pyrrole-N as a dopant promoted the adsorption of phenol, while pyridine-N was more favorable for O2 adsorption. The unique balance of nitrogen types possessed by modified activated carbon NAC-750 permits the efficient synergistic generation and utilization of H2O2 in a balanced manner during the degradation of phenol. This work provides a new direction for the rational nitrogen-doping modification of activated carbon for the electro-Fenton-based degradation of organic pollutants.
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Affiliation(s)
- Zhuangzhuang Zhang
- School of Mechanical Science and Engineering, Northeast Petroleum University, Daqing, Heilongjiang, 163318, China
| | - Haiqian Zhao
- School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou, Jiangsu, 215009, China.
| | - Zhonghua Wang
- School of Civil Engineering and Architecture, Northeast Petroleum University, Daqing, Heilongjiang, 163318, China
| | - Zhipei Hu
- School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou, Jiangsu, 215009, China
| | - Qingshu Wang
- School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou, Jiangsu, 215009, China
| | - Erlin Meng
- School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou, Jiangsu, 215009, China
| | - Shiwei Lai
- School of Civil Engineering and Architecture, Northeast Petroleum University, Daqing, Heilongjiang, 163318, China
| | - Jiaxin Ying
- School of Mechanical Science and Engineering, Northeast Petroleum University, Daqing, Heilongjiang, 163318, China
| | - Hongguang Li
- School of Mechanical Science and Engineering, Northeast Petroleum University, Daqing, Heilongjiang, 163318, China
| | - Chuanyan Wu
- School of Mechanical Science and Engineering, Northeast Petroleum University, Daqing, Heilongjiang, 163318, China
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Li Y, Guo Y, Luan D, Gu X, Lou XWD. An Unlocked Two-Dimensional Conductive Zn-MOF on Polymeric Carbon Nitride for Photocatalytic H 2 O 2 Production. Angew Chem Int Ed Engl 2023; 62:e202310847. [PMID: 37698180 DOI: 10.1002/anie.202310847] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Revised: 09/09/2023] [Accepted: 09/12/2023] [Indexed: 09/13/2023]
Abstract
Developing highly efficient catalytic sites for O2 reduction to H2 O2 , while ensuring the fast injection of energetic electrons into these sites, is crucial for artificial H2 O2 photosynthesis but remains challenging. Herein, we report a strongly coupled hybrid photocatalyst comprising polymeric carbon nitride (CN) and a two-dimensional conductive Zn-containing metal-organic framework (Zn-MOF) (denoted as CN/Zn-MOF(lc)/400; lc, low crystallinity; 400, annealing temperature in °C), in which the catalytic capability of Zn-MOF(lc) for H2 O2 production is unlocked by the annealing-induced effects. As revealed by experimental and theoretical calculation results, the Zn sites coordinated to four O (Zn-O4 ) in Zn-MOF(lc) are thermally activated to a relatively electron-rich state due to the annealing-induced local structure shrinkage, which favors the formation of a key *OOH intermediate of 2e- O2 reduction on these sites. Moreover, the annealing treatment facilitates the photoelectron migration from the CN photocatalyst to the Zn-MOF(lc) catalytic unit. As a result, the optimized catalyst exhibits dramatically enhanced H2 O2 production activity and excellent stability under visible light irradiation.
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Affiliation(s)
- Yunxiang Li
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore
| | - Yan Guo
- School of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, 010021, China
| | - Deyan Luan
- Department of Chemistry, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, 999077, Hong Kong, China
| | - Xiaojun Gu
- School of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, 010021, China
| | - Xiong Wen David Lou
- Department of Chemistry, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, 999077, Hong Kong, China
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29
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Zhang Q, Chen J, Che H, Liu B, Ao Y. n→π* Electron Transitions and Directional Charge Migration Synergistically Promoting O 2 Activation and Holes Utilization on Carbon Nitride for Efficiently Photocatalytic Degradation of Organic Contaminants. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2302510. [PMID: 37323095 DOI: 10.1002/smll.202302510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2023] [Revised: 05/28/2023] [Indexed: 06/17/2023]
Abstract
Stimulating electron transitions and promoting exciton dissociation are crucial for improving the photocatalytic performance of polymeric carbon nitride (CN) yet still challenging. Herein, a novel CN with C dopant and asymmetric structure (CC-UCN2 ) is ingeniously synthesized. The obtained CC-UCN2 not only reinforces the intrinsic π→π* electron transitions, but also successfully awakens additional n→π* electron transitions. Besides, charge centers dislocation caused by symmetry breaking induces a spontaneous polarized electric field, effectively breaking the constraints of Coulomb electrostatic interaction between electrons and holes and driving their directional migration. Along with the spatial separation of reduction and oxidation sites, CC-UCN2 shows exceptional O2 activation and holes oxidation efficiency, thus exhibits a high degradation rate constant (0.201 min-1 ) and mineralization rate (80.1%) for bisphenol A (BPA)(far outperforming pristine and other modified CNs). This work proposes a novel perspective for developing high-efficiency photocatalysts and comprehending the underlying mechanism of O2 activation and holes oxidation for pollutant degradation.
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Affiliation(s)
- Qiang Zhang
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, No.1, Xikang road, Nanjing, 210098, China
| | - Juan Chen
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, No.1, Xikang road, Nanjing, 210098, China
| | - Huinan Che
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, No.1, Xikang road, Nanjing, 210098, China
| | - Bin Liu
- Department of Materials Science and Engineering, City University of Hong Kong, Hong Kong SAR, 999077, China
| | - Yanhui Ao
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, No.1, Xikang road, Nanjing, 210098, China
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30
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Fu C, Liu L, Li Z, Wei Y, Huang W, Zhang X. Synergy of Bulk Defects and Surface Defects on TiO 2 for Highly Efficient Photocatalytic Production of H 2O 2. J Phys Chem Lett 2023; 14:7690-7696. [PMID: 37606254 DOI: 10.1021/acs.jpclett.3c01865] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/23/2023]
Abstract
Artificial photosynthesis of H2O2 by TiO2-based semiconductors is a promising approach for H2O2 production. However, the efficiency of pristine TiO2 is still limited by rapid charge separation and low O2 adsorption capacity. Here, we found that the synergy between bulk and surface defects on TiO2 could overcome this demanding bottleneck. The introduced bulk defects act as hole acceptors to induce directional hole transfer, efficiently boosting electron-hole separation. Furthermore, the adsorption of O2 is strengthened by the introduced surface defects. Consequently, this synergy of bulk and surface defects on TiO2 significantly improves the photocatalytic performance, with a H2O2 production rate of 4560 μmol h-1 g-1, outperforming most reported TiO2-based photocatalysts. This work not only provides a new insight into the mechanism of surface/bulk defects in photocatalysis but also highlights that surface/bulk regulation holds great promise for achiveing efficient photocatalytic conversion.
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Affiliation(s)
- Cong Fu
- Key Laboratory of Functional Molecular Solids Ministry of Education, College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241002, P. R. China
| | - Lingfang Liu
- Key Laboratory of Functional Molecular Solids Ministry of Education, College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241002, P. R. China
| | - Zhaorui Li
- Hefei National Laboratory for Physical Sciences at the Microscale, Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes, and Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, P. R. China
| | - Yaxiong Wei
- Anhui Province Key Laboratory of Optoelectric Materials Science and Technology, School of Physics and Electronic Information, Anhui Normal University, Wuhu 241002, P. R. China
| | - Weixin Huang
- Hefei National Laboratory for Physical Sciences at the Microscale, Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes, and Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, P. R. China
| | - Xiaojun Zhang
- Key Laboratory of Functional Molecular Solids Ministry of Education, College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241002, P. R. China
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31
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He F, Hu Y, Zhong H, Wang Z, Peng S, Li Y. Effect of molten-salt modulation on the composition and structure of g-C 3N 4-based photocatalysts. Chem Commun (Camb) 2023; 59:10476-10487. [PMID: 37577935 DOI: 10.1039/d3cc03052k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/15/2023]
Abstract
Graphitic carbon nitride (g-C3N4), as an attractive metal-free polymer photocatalyst, has attracted extensive attention in energy and environmental fields in recent years. The photoactivity of bulk g-C3N4 is moderate on account of solid-phase thermal-condensation synthesis. This leads to inadequate light absorption, limited surface area, and easy recombination of charge carriers. The composition and nanostructure of g-C3N4 have been studied extensively. Molten-salt modulation is fascinating because of its "green" credentials and the properties of liquid-phase reaction systems. The review focuses mainly on molten-salt modulation of the composition and structure of g-C3N4 based-photocatalysts. We focus on elemental doping, molecular doping, and defect engineering, as well as control of the crystal structure, multi-dimensional structure, hom/heterostructures for photocatalytic applications. This review provides new insights to develop g-C3N4-based photocatalysts with control of composition and structure by facile molten-salt modulation in energy-conversion and environmental fields.
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Affiliation(s)
- Fang He
- School of Chemistry and Chemical Engineering, Nanchang University, Nanchang 330031, P. R. China.
| | - Yan Hu
- School of Chemistry and Chemical Engineering, Nanchang University, Nanchang 330031, P. R. China.
| | - Hong Zhong
- School of Chemistry and Chemical Engineering, Nanchang University, Nanchang 330031, P. R. China.
| | - Zhenxing Wang
- School of Chemistry and Chemical Engineering, Nanchang University, Nanchang 330031, P. R. China.
| | - Shaoqin Peng
- School of Chemistry and Chemical Engineering, Nanchang University, Nanchang 330031, P. R. China.
| | - Yuexiang Li
- School of Chemistry and Chemical Engineering, Nanchang University, Nanchang 330031, P. R. China.
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32
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Qin C, Wu X, Tang L, Chen X, Li M, Mou Y, Su B, Wang S, Feng C, Liu J, Yuan X, Zhao Y, Wang H. Dual donor-acceptor covalent organic frameworks for hydrogen peroxide photosynthesis. Nat Commun 2023; 14:5238. [PMID: 37640726 PMCID: PMC10462664 DOI: 10.1038/s41467-023-40991-7] [Citation(s) in RCA: 23] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2022] [Accepted: 08/18/2023] [Indexed: 08/31/2023] Open
Abstract
Constructing photocatalytically active and stable covalent organic frameworks containing both oxidative and reductive reaction centers remain a challenge. In this study, benzotrithiophene-based covalent organic frameworks with spatially separated redox centers are rationally designed for the photocatalytic production of hydrogen peroxide from water and oxygen without sacrificial agents. The triazine-containing framework demonstrates high selectivity for H2O2 photogeneration, with a yield rate of 2111 μM h-1 (21.11 μmol h-1 and 1407 μmol g-1 h-1) and a solar-to-chemical conversion efficiency of 0.296%. Codirectional charge transfer and large energetic differences between linkages and linkers are verified in the double donor-acceptor structures of periodic frameworks. The active sites are mainly concentrated on the electron-acceptor fragments near the imine bond, which regulate the electron distribution of adjacent carbon atoms to optimally reduce the Gibbs free energy of O2* and OOH* intermediates during the formation of H2O2.
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Affiliation(s)
- Chencheng Qin
- College of Environmental Science and Engineering and Key Laboratory of Environmental Biology and Pollution Control (Ministry of Education), Hunan University, Changsha, 410082, China
| | - Xiaodong Wu
- College of Materials Science and Engineering, Nanjing Tech University, Nanjing, 210009, China
| | - Lin Tang
- College of Environmental Science and Engineering and Key Laboratory of Environmental Biology and Pollution Control (Ministry of Education), Hunan University, Changsha, 410082, China
| | - Xiaohong Chen
- School of Frontier Crossover Studies, Hunan University of Technology and Business, Changsha, 410205, China
| | - Miao Li
- College of Environmental Science and Engineering and Key Laboratory of Environmental Biology and Pollution Control (Ministry of Education), Hunan University, Changsha, 410082, China
| | - Yi Mou
- College of Environmental Science and Engineering and Key Laboratory of Environmental Biology and Pollution Control (Ministry of Education), Hunan University, Changsha, 410082, China
| | - Bo Su
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fujian, 350002, China
| | - Sibo Wang
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fujian, 350002, China
| | - Chengyang Feng
- Catalysis Centre, King Abdullah University of Science and Technology, Thuwal, 23955-6900, Saudi Arabia
| | - Jiawei Liu
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, 21 Nanyang Link, 637371, Singapore, Singapore
| | - Xingzhong Yuan
- College of Environmental Science and Engineering and Key Laboratory of Environmental Biology and Pollution Control (Ministry of Education), Hunan University, Changsha, 410082, China.
| | - Yanli Zhao
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, 21 Nanyang Link, 637371, Singapore, Singapore.
| | - Hou Wang
- College of Environmental Science and Engineering and Key Laboratory of Environmental Biology and Pollution Control (Ministry of Education), Hunan University, Changsha, 410082, China.
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, 21 Nanyang Link, 637371, Singapore, Singapore.
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33
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Liu J, Wang M, Tao Z, He L, Guo C, Liu B, Zhang Z. Photo-assisted Zn-air battery-driven self-powered aptasensor based on the 2D/2D Schottky heterojunction of cadmium-doped molybdenum disulfide and Ti 3C 2T x nanosheets for the sensitive detection of penicillin G. Anal Chim Acta 2023; 1270:341396. [PMID: 37311607 DOI: 10.1016/j.aca.2023.341396] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Revised: 05/13/2023] [Accepted: 05/17/2023] [Indexed: 06/15/2023]
Abstract
A novel photocatalyzed Zn-air battery-driven (ZAB)-based aptasensor has been manufactured using the two dimensional (2D)/2D Schottky heterojunction as photocathode and Zn plate as photoanode. It was then employed to sensitively and selectively detect penicillin G (PG) in the complex environment. The 2D/2D Schottky heterojunction was established by the in situ growth of cadmium-doped molybdenum disulfide nanosheets (Cd-MoS2 NSs) around Ti3C2Tx NSs (denoted as Cd-MoS2@Ti3C2Tx) by using phosphomolybdic acid (PMo12) as precursor, thioacetamide as sulfur source, and Cd(NO3)2 as a doping agent through the hydrothermal method. The gained Cd-MoS2@Ti3C2Tx heterojunction possessed contact interface, hierarchical structure, and plenty of sulfur and oxygen vacancies, thus showing the enhanced separation ability of photocarriers and electron transfer. Due to the enhanced UV-vis light adsorption ability, high photoelectric conversion efficiency, and exposed catalytic active sites, the constructed photocatalyzed ZAB displayed a boosted output voltage of 1.43 V under UV-vis light irradiation. The developed ZAB-driven self-powered aptasensor demonstrated an ultralow detection limit of 0.06 fg mL-1 within a PG concentration ranged from 1.0 fg mL-1 to 0.1 ng mL-1, as deduced from the power density-current curves, along with high specificity, good stability and promising reproducibility, as well as excellent regeneration ability and wide applicability. The present work provided an alternative analysis method for the sensitive analysis of antibiotics based on the portable photocatalyzed ZAB-driven self-powered aptasensor.
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Affiliation(s)
- Jiameng Liu
- College of Chemistry and Chemical Engineering, Henan Polytechnic University, 2001 Century Avenue, Jiaozuo, 454000, PR China
| | - Mengfei Wang
- College of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou, 450001, PR China
| | - Zheng Tao
- College of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou, 450001, PR China
| | - Linghao He
- College of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou, 450001, PR China
| | - Chuanpan Guo
- College of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou, 450001, PR China
| | - Baozhong Liu
- College of Chemistry and Chemical Engineering, Henan Polytechnic University, 2001 Century Avenue, Jiaozuo, 454000, PR China.
| | - Zhihong Zhang
- College of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou, 450001, PR China.
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34
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He F, Yuan H, Hu Y, Huang J, Wang Z, Peng S, Li Y. Construction of π-conjugated crystalline carbon dots with carbon nitride nanofragments for efficient photocatalytic H 2 evolution. Chem Commun (Camb) 2023; 59:10016-10019. [PMID: 37523209 DOI: 10.1039/d3cc02859c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/01/2023]
Abstract
Crystalline carbon dots (CCDs) embedded in carbon nitride (CN) nanofragments (CCDs-CN) have been developed through facile molten salt treatment. Molten salt treatment not only reconstructs CN layered sheets to form nanofragments, but also promotes the crystallization of CDs-CN. The π-conjugated electric field between CCDs and CN accelerates charge carrier separation for efficient photocatalytic H2 evolution.
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Affiliation(s)
- Fang He
- School of Chemistry and Chemical Engineering, Nanchang University, Nanchang, 330031, P. R. China.
| | - Hubo Yuan
- School of Chemistry and Chemical Engineering, Nanchang University, Nanchang, 330031, P. R. China.
| | - Yan Hu
- School of Chemistry and Chemical Engineering, Nanchang University, Nanchang, 330031, P. R. China.
| | - Jiawei Huang
- School of Physics and Materials Science, Nanchang University, Nanchang, 330031, P. R. China
| | - Zhenxing Wang
- School of Chemistry and Chemical Engineering, Nanchang University, Nanchang, 330031, P. R. China.
| | - Shaoqin Peng
- School of Chemistry and Chemical Engineering, Nanchang University, Nanchang, 330031, P. R. China.
| | - Yuexiang Li
- School of Chemistry and Chemical Engineering, Nanchang University, Nanchang, 330031, P. R. China.
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35
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Zhang M, Lai C, Xu F, Huang D, Hu T, Li B, Ma D, Liu S, Fu Y, Li L, Tang L, Chen L. Ultrahigh Performance H 2 O 2 Generation by Single-Atom Fe Catalysts with N/O Bidentate Ligand via Oxalic Acid and Oxygen Molecules Activation. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2301817. [PMID: 37093465 DOI: 10.1002/smll.202301817] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Revised: 04/03/2023] [Indexed: 05/03/2023]
Abstract
Single-atom catalysts (SACs) for photocatalytic hydrogen peroxide (H2 O2 ) generation are researched but it is still challenging to obtain high H2 O2 yields. Herein, graphite carbon nitride (FeSA /CN) confined single Fe atoms with N/O coordination is prepared, and FeSA /CN shows high H2 O2 production via oxalic acid and O2 activation. Under visible light illumination, the concentration of H2 O2 generated by FeSA /CN can achieve 40.19 mM g-1 h-1 , which is 10.44 times higher than that of g-C3 N4 . The enhanced H2 O2 generation can be attributed to the formation of metal-organic complexes and rapid electron transfer. Moreover, the O2 activation of photocatalysts is revealed by 3,3',5,5'-tetramethylbenzidine oxidation. The results display that the O2 activation capacity of FeSA /CN is higher than that of g-C3 N4 , which facilitates the formation of H2 O2 . Finally, density functional theory calculation demonstrates that O2 is chemically adsorbed on Fe atomic sites. The adsorption energy of O2 is enhanced from -0.555 to -1.497 eV, and the bond length of OO is extended from 1.235 to 1.292 Å. These results exhibit that the confinement of single Fe atoms can promote O2 adsorption and activation. Finally, the photocatalytic mechanism is elaborated, which provides a deep understanding for SACs-catalyzed H2 O2 generation.
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Affiliation(s)
- Mingming Zhang
- College of Environmental Science and Engineering, Hunan University, Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Lushan South Road, Changsha, 410082, P. R. China
| | - Cui Lai
- College of Environmental Science and Engineering, Hunan University, Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Lushan South Road, Changsha, 410082, P. R. China
| | - Fuhang Xu
- College of Environmental Science and Engineering, Hunan University, Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Lushan South Road, Changsha, 410082, P. R. China
| | - Danlian Huang
- College of Environmental Science and Engineering, Hunan University, Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Lushan South Road, Changsha, 410082, P. R. China
| | - Tianjue Hu
- College of Environmental Science and Engineering, Hunan University, Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Lushan South Road, Changsha, 410082, P. R. China
| | - Bisheng Li
- College of Geography and Environmental Sciences, Zhejiang Normal University, Yingbin Road, Jinhua, 321004, P. R. China
| | - Dengsheng Ma
- College of Environmental Science and Engineering, Hunan University, Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Lushan South Road, Changsha, 410082, P. R. China
| | - Shiyu Liu
- College of Environmental Science and Engineering, Hunan University, Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Lushan South Road, Changsha, 410082, P. R. China
| | - Yukui Fu
- College of Environmental Science and Engineering, Hunan University, Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Lushan South Road, Changsha, 410082, P. R. China
| | - Ling Li
- College of Environmental Science and Engineering, Hunan University, Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Lushan South Road, Changsha, 410082, P. R. China
| | - Lin Tang
- College of Environmental Science and Engineering, Hunan University, Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Lushan South Road, Changsha, 410082, P. R. China
| | - Liang Chen
- Faculty of Life Science and Technology, Central South University of Forestry and Technology, Shaoshan Road, Changsha, 410004, P. R. China
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36
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Li Q, Zhang Y, Zeng Y, Ding M. Ordered porous nitrogen-vacancy carbon nitride for efficient visible-light hydrogen evolution. J Colloid Interface Sci 2023; 642:53-60. [PMID: 37001457 DOI: 10.1016/j.jcis.2023.03.128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2022] [Revised: 03/17/2023] [Accepted: 03/20/2023] [Indexed: 03/31/2023]
Abstract
Photocatalytic H2 evolution is a promising technology which could be instrumental in producing clean hydrogen energy. In regard to the photocatalyst, its band structure, morphology and light utilization have a significant influence on the H2 evolution rate and stability. Herein, a three-dimensional ordered macroporous nitrogen-vacancy carbon nitride (3DOM V-CN) photocatalyst was developed by combining vacancies with 3DOM structure for visible-light photocatalytic H2 evolution. This strategy preserved the structural properties of 3DOM to improve the light utilization and the specific surface area of the photocatalysts. Moreover, constructing suitable vacancies could trap electrons to facilitate the separation of photogenerated carriers, and extend the light absorption region of the photocatalysts by adjusting band structure, thus improving photocatalytic activity. Compared with CN (0.3 mmol h-1 g-1), 3DOM V-CN demonstrated a superior photocatalytic H2 evolution rate of 2.3 mmol h-1 g-1 (λ ≥ 420 nm) while possessing excellent stability. This work provides an effective and low-cost strategy for the design of the photocatalysts with high activity and stability by simultaneously tuning the band structure and morphology.
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37
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Chen D, Yao B, Zhi X, Tian C, Chen M, Cao S, Feng X, Che H, Zhang K, Ao Y. Multi-heteroatom-doping promotes molecular oxygen activation on polymeric carbon nitride for simultaneous generation of H 2O 2 and degradation of oxcarbazepine. NANOSCALE 2023. [PMID: 37376986 DOI: 10.1039/d3nr01299a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/29/2023]
Abstract
Simultaneously realizing the efficient generation of H2O2 and degradation of pollutants is of great significance for environmental remediation. However, most polymeric semiconductors only show moderate performance in molecular oxygen (O2) activation due to the sluggish electron-hole pair dissociation and charge transfer dynamics. Herein, we develop a simple thermal shrinkage strategy to construct multi-heteroatom-doped polymeric carbon nitride (K, P, O-CNx). The resultant K, P, O-CNx not only improves the separation efficiency of charge carriers, but also improves the adsorption/activation capacity of O2. K, P, O-CNx significantly increases the production of H2O2 and the degradation activity of oxcarbazepine (OXC) under visible light. K, P, O-CN5 shows a high H2O2 production rate (1858 μM h-1 g-1) in water under visible light, far surpassing that of pure PCN. The apparent rate constant for OXC degradation by K, P, O-CN5 increases to 0.0491 min-1, which is 8.47 times that of PCN. Density functional theory (DFT) calculations show that the adsorption energy of O2 near phosphorus atoms in K, P, O-CNx is the highest. This work provides a new idea for the efficient degradation of pollutants and generation of H2O2 at the same time.
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Affiliation(s)
- Derui Chen
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, No. 1, Xikang Road, Nanjing, 210098, China.
| | - Bingling Yao
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, No. 1, Xikang Road, Nanjing, 210098, China.
| | - Xinyu Zhi
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, No. 1, Xikang Road, Nanjing, 210098, China.
| | - Chang Tian
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, No. 1, Xikang Road, Nanjing, 210098, China.
| | - Minghao Chen
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, No. 1, Xikang Road, Nanjing, 210098, China.
| | - Siyi Cao
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, No. 1, Xikang Road, Nanjing, 210098, China.
| | - Xinyu Feng
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, No. 1, Xikang Road, Nanjing, 210098, China.
| | - Huinan Che
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, No. 1, Xikang Road, Nanjing, 210098, China.
| | - Kan Zhang
- Key Laboratory of Advanced Display Material and Devices, School of Materials Science and Engineering, Nanjing University of Science and Technology, 210094 Nanjing, China.
| | - Yanhui Ao
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, No. 1, Xikang Road, Nanjing, 210098, China.
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38
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Luo Y, Zhang B, Liu C, Xia D, Ou X, Cai Y, Zhou Y, Jiang J, Han B. Sulfone-Modified Covalent Organic Frameworks Enabling Efficient Photocatalytic Hydrogen Peroxide Generation via One-Step Two-Electron O 2 Reduction. Angew Chem Int Ed Engl 2023; 62:e202305355. [PMID: 37096446 DOI: 10.1002/anie.202305355] [Citation(s) in RCA: 47] [Impact Index Per Article: 47.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2023] [Revised: 04/24/2023] [Accepted: 04/24/2023] [Indexed: 04/26/2023]
Abstract
Photocatalytic oxygen reduction reaction (ORR) offers a promising hydrogen peroxide (H2 O2 ) synthetic strategy, especially the one-step two-electron (2e- ) ORR route holds great potential in achieving highly efficient and selectivity. However, efficient one-step 2e- ORR is rarely harvested and the underlying mechanism for regulating the ORR pathways remains greatly obscure. Here, by loading sulfone units into covalent organic frameworks (FS-COFs), we present an efficient photocatalyst for H2 O2 generation via one-step 2e- ORR from pure water and air. Under visible light irradiation, FS-COFs exert a superb H2 O2 yield of 3904.2 μmol h-1 g-1 , outperforming most reported metal-free catalysts under similar conditions. Experimental and theoretical investigation reveals that the sulfone units accelerate the separation of photoinduced electron-hole (e- -h+ ) pairs, enhance the protonation of COFs, and promote O2 adsorption in the Yeager-type, which jointly alters the reaction process from two-step 2e- ORR to the one-step one, thereby achieving efficient H2 O2 generation with high selectivity.
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Affiliation(s)
- Yu Luo
- Key Laboratory for City Cluster Environmental Safety and Green Development of the Ministry of Education, School of Ecology, Environment and Resources, Guangdong University of Technology, Guangzhou, 510006, P. R. China
| | - Beiping Zhang
- Key Laboratory for City Cluster Environmental Safety and Green Development of the Ministry of Education, School of Ecology, Environment and Resources, Guangdong University of Technology, Guangzhou, 510006, P. R. China
| | - Chenchen Liu
- Key Laboratory for City Cluster Environmental Safety and Green Development of the Ministry of Education, School of Ecology, Environment and Resources, Guangdong University of Technology, Guangzhou, 510006, P. R. China
| | - Dehua Xia
- School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou, 510275, P. R. China
| | - Xinwen Ou
- School of Physics, Zhejiang University, Zheda Road 38, Hangzhou, 310027, P. R. China
| | - Yanpeng Cai
- Key Laboratory for City Cluster Environmental Safety and Green Development of the Ministry of Education, School of Ecology, Environment and Resources, Guangdong University of Technology, Guangzhou, 510006, P. R. China
| | - Yang Zhou
- Key Laboratory for City Cluster Environmental Safety and Green Development of the Ministry of Education, School of Ecology, Environment and Resources, Guangdong University of Technology, Guangzhou, 510006, P. R. China
| | - Jin Jiang
- Key Laboratory for City Cluster Environmental Safety and Green Development of the Ministry of Education, School of Ecology, Environment and Resources, Guangdong University of Technology, Guangzhou, 510006, P. R. China
| | - Bin Han
- Key Laboratory for City Cluster Environmental Safety and Green Development of the Ministry of Education, School of Ecology, Environment and Resources, Guangdong University of Technology, Guangzhou, 510006, P. R. China
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Ji R, Dong Y, Zhao H, Pan C, Wang G, Zhu Y, Li J. Z-scheme cobalt-iron oxide/perylene diimide supermolecule heterojunction for high-efficiency ciprofloxacin removal in a photocatalysis-self-Fenton system. J Colloid Interface Sci 2023; 648:623-632. [PMID: 37321081 DOI: 10.1016/j.jcis.2023.05.180] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Revised: 05/18/2023] [Accepted: 05/28/2023] [Indexed: 06/17/2023]
Abstract
Fenton technology has been famous on antibiotics removal, but seriously restricted by the extra addition of H2O2 and low mineralization efficiency. Herein, we develop a novel cobalt-iron oxide/perylene diimide organic supermolecule (CoFeO/PDIsm) Z-scheme heterojunction under photocatalysis-self-Fenton system, in which the holes (h+) of photocatalyst can mineralize organic pollutants and the photo-generated electrons (e-) are used to in-situ H2O2 production with high efficiency. The CoFeO/PDIsm exhibits superior in-situ H2O2 production at a rate of 281.7 µmol g-1 h-1 in contaminating solution, correspondingly of total organic carbon (TOC) removal rate of ciprofloxacin (CIP) is 63.7 %, far exceeding current photocatalysts. The high H2O2 production rate and remarkable mineralization ability are ascribed to great charge separation in Z-scheme heterojunction. This work provides a novel Z-scheme heterojunction with photocatalysis-self-Fenton system for environmental-friendly removing the organic containment.
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Affiliation(s)
- Rong Ji
- International Joint Research Center for Photo-responsive Molecules and Materials, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China
| | - Yuming Dong
- International Joint Research Center for Photo-responsive Molecules and Materials, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China.
| | - Hui Zhao
- International Joint Research Center for Photo-responsive Molecules and Materials, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China
| | - Chengsi Pan
- International Joint Research Center for Photo-responsive Molecules and Materials, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China
| | - Guangli Wang
- International Joint Research Center for Photo-responsive Molecules and Materials, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China
| | - Yongfa Zhu
- International Joint Research Center for Photo-responsive Molecules and Materials, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China; Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Junshan Li
- Institute for Advanced Study, Chengdu University, Chengdu 610106, China
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Che H, Wang J, Wang P, Ao Y, Chen J, Gao X, Zhu F, Liu B. Simultaneously Achieving Fast Intramolecular Charge Transfer and Mass Transport in Holey D-π-A Organic Conjugated Polymers for Highly Efficient Photocatalytic Pollutant Degradation. JACS AU 2023; 3:1424-1434. [PMID: 37234118 PMCID: PMC10206595 DOI: 10.1021/jacsau.3c00088] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/20/2023] [Revised: 04/21/2023] [Accepted: 04/25/2023] [Indexed: 05/27/2023]
Abstract
Simultaneously realizing efficient intramolecular charge transfer and mass transport in metal-free polymer photocatalysts is critical but challenging for environmental remediation. Herein, we develop a simple strategy to construct holey polymeric carbon nitride (PCN)-based donor-π-acceptor organic conjugated polymers via copolymerizing urea with 5-bromo-2-thiophenecarboxaldehyde (PCN-5B2T D-π-A OCPs). The resultant PCN-5B2T D-π-A OCPs extended the π-conjugate structure and introduced abundant micro-, meso-, and macro-pores, which greatly promoted intramolecular charge transfer, light absorption, and mass transport and thus significantly enhanced the photocatalytic performance in pollutant degradation. The apparent rate constant of the optimized PCN-5B2T D-π-A OCP for 2-mercaptobenzothiazole (2-MBT) removal is ∼10 times higher than that of the pure PCN. Density functional theory calculations reveal that the photogenerated electrons in PCN-5B2T D-π-A OCPs are much easier to transfer from the donor tertiary amine group to the benzene π-bridge and then to the acceptor imine group, while 2-MBT is more easily adsorbed on π-bridge and reacts with the photogenerated holes. A Fukui function calculation on the intermediates of 2-MBT predicted the real-time changing of actual reaction sites during the entire degradation process. Additionally, computational fluid dynamics further verified the rapid mass transport in holey PCN-5B2T D-π-A OCPs. These results demonstrate a novel concept toward highly efficient photocatalysis for environmental remediation by improving both intramolecular charge transfer and mass transport.
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Affiliation(s)
- Huinan Che
- Key
Laboratory of Integrated Regulation and Resource Development on Shallow
Lakes, Ministry of Education, College of Environment, Hohai University, No. 1, Xikang Road, Nanjing 210098, China
| | - Jian Wang
- Key
Laboratory of Integrated Regulation and Resource Development on Shallow
Lakes, Ministry of Education, College of Environment, Hohai University, No. 1, Xikang Road, Nanjing 210098, China
| | - Peifang Wang
- Key
Laboratory of Integrated Regulation and Resource Development on Shallow
Lakes, Ministry of Education, College of Environment, Hohai University, No. 1, Xikang Road, Nanjing 210098, China
| | - Yanhui Ao
- Key
Laboratory of Integrated Regulation and Resource Development on Shallow
Lakes, Ministry of Education, College of Environment, Hohai University, No. 1, Xikang Road, Nanjing 210098, China
| | - Juan Chen
- Key
Laboratory of Integrated Regulation and Resource Development on Shallow
Lakes, Ministry of Education, College of Environment, Hohai University, No. 1, Xikang Road, Nanjing 210098, China
| | - Xin Gao
- Key
Laboratory of Integrated Regulation and Resource Development on Shallow
Lakes, Ministry of Education, College of Environment, Hohai University, No. 1, Xikang Road, Nanjing 210098, China
| | - Fangyuan Zhu
- Shanghai
Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201204, China
| | - Bin Liu
- Department
of Materials Science and Engineering, City
University of Hong Kong, Hong Kong-SAR 999077, China
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Xu Y, Liao J, Zhang L, Sun Z, Ge C. Dual sulfur defect engineering of Z-scheme heterojunction on Ag-CdS 1-x@ZnIn 2S 4-x hollow core-shell for ultra-efficient selective photocatalytic H 2O 2 production. J Colloid Interface Sci 2023; 647:446-455. [PMID: 37271089 DOI: 10.1016/j.jcis.2023.05.140] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Revised: 05/04/2023] [Accepted: 05/20/2023] [Indexed: 06/06/2023]
Abstract
Photocatalytic production of hydrogen peroxide (H2O2) using sunlight as an energy source, water and molecular oxygen as feedstock is considered as a green and sustainable promising strategy to solve the energy and environmental crisis. Despite significant improvements in photocatalyst design tuning, however, the relatively low photocatalytic H2O2 productivity is still far from satisfactory. Herein, we developed a multi-metal composite sulfide (Ag-CdS1-x@ZnIn2S4-x) with double S vacancies and hollow core-shell Z-type heterojunction structure for H2O2 generation by a simple hydrothermal method. The unique hollow structure improves the utilization of light source. The existence of Z-type heterojunction promotes the spatial separation of carriers, and the core-shell structure increases the interface area and active sites. Under visible light irradiation, Ag-CdS1-x@ZnIn2S4-x had a high hydrogen peroxide yield of 1183.7 μmol h-1 g-1, which was 6 times that of CdS. The electron transfer number (n = 1.53) obtained from the Koutecky-Levuch plot and DFT calculation confirm that the presence of dual disulfide vacancies provides good selectivity of 2e- O2 reduction to H2O2. This work provides new insights into the regulation of highly selective two-electron photocatalytic H2O2 production, and also provides new ideas for the design and development of highly active energy conversion photocatalysts.
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Affiliation(s)
- Yandong Xu
- Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province, School of Ecology and Environment, Hainan University, Haikou 570228, China
| | - Jianjun Liao
- Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province, School of Ecology and Environment, Hainan University, Haikou 570228, China.
| | - Linlin Zhang
- Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province, School of Ecology and Environment, Hainan University, Haikou 570228, China
| | - Zihan Sun
- Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province, School of Ecology and Environment, Hainan University, Haikou 570228, China
| | - Chengjun Ge
- Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province, School of Ecology and Environment, Hainan University, Haikou 570228, China.
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Jing M, Zhao H, Jian L, Pan C, Dong Y, Zhu Y. Coral-like B-doped g-C 3N 4 with enhanced molecular dipole to boost photocatalysis-self-Fenton removal of persistent organic pollutants. JOURNAL OF HAZARDOUS MATERIALS 2023; 449:131017. [PMID: 36812729 DOI: 10.1016/j.jhazmat.2023.131017] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2022] [Revised: 02/08/2023] [Accepted: 02/15/2023] [Indexed: 06/18/2023]
Abstract
Fenton process is a popular advanced oxidation process for water purification. However, it requires an external addition of H2O2, thus raising safety threats and economic costs and encountering the problems of slow cycling of Fe2+/Fe3+ and low mineralization efficiency. Herein, we developed a novel photocatalysis-self-Fenton system based on coral-like B-doped g-C3N4 (Coral-B-CN) photocatalyst for 4-chlorophenol (4-CP) removal where H2O2 can be in situ generated by photocatalysis over Coral-B-CN, the cycling of Fe2+/Fe3+ was accelerated by photoelectrons, and the photoholes promoted 4-CP mineralization. Coral-B-CN was innovatively synthesized by hydrogen bond self-assembly followed by calcination. B heteroatom doping produced enhanced molecular dipole, while the morphological engineering exposed more active sites and optimized band structure. The effective combination of the two enhances charge separation and mass transfer between the phases, resulting in efficient in-situ H2O2 production, faster Fe2+/Fe3+ valence cycling and enhanced hole oxidation. Accordingly, nearly all 4-CP can be degraded during 50 min under the combined action of more ·OH and holes with stronger oxidation capacity. The mineralization rate of this system reached 70.3%, which is 2.6 and 4.9 times higher than that of Fenton process and photocatalysis, respectively. Besides, this system maintained excellent stability and can be applied in a broad range of pHs. The study would provide important insights into developing improved Fenton process with high performance for the removal of persistent organic pollutants.
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Affiliation(s)
- Mengyang Jing
- International Joint Research Center for Photo-responsive Molecules and Materials, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China
| | - Hui Zhao
- International Joint Research Center for Photo-responsive Molecules and Materials, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China
| | - Liang Jian
- International Joint Research Center for Photo-responsive Molecules and Materials, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China
| | - Chengsi Pan
- International Joint Research Center for Photo-responsive Molecules and Materials, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China
| | - Yuming Dong
- International Joint Research Center for Photo-responsive Molecules and Materials, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China.
| | - Yongfa Zhu
- International Joint Research Center for Photo-responsive Molecules and Materials, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China; Department of Chemistry, Tsinghua University, Beijing 100084, China
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43
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Lin F, Wang T, Ren Z, Cai X, Wang Y, Chen J, Wang J, Zang S, Mao F, Lv L. Central nitrogen vacancies in polymeric carbon nitride for boosted photocatalytic H 2O 2 production. J Colloid Interface Sci 2023; 636:223-229. [PMID: 36634392 DOI: 10.1016/j.jcis.2023.01.036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Revised: 12/25/2022] [Accepted: 01/06/2023] [Indexed: 01/09/2023]
Abstract
Polymeric carbon nitride (PCN) with vacancies usually exhibits distinguished mass transfer efficiency, outstanding carrier kinetics and excellent photoactivity. Previous studies have revealed the effect of edge vacancies in heptazine units of PCN; however, the roles of central nitrogen vacancies are scarcely investigated. Herein, central nitrogen vacancies polymeric carbon nitride (PCN-NVC) is rationally prepared for photocatalytic H2O2 production with a rate of 25.1 umol/h (λ > 420 nm), which is 3.5 times than that of pristine PCN. Photoelectronic measurements reveal that the central nitrogen vacancies optimize the kinetic process of electron-hole pairs. Density functional theory (DFT) calculations disclose that PCN-NVC displays lower O2 adsorption energy, thereby accelerating the OOH* formation and decreasing the H2O2 generation energy barrier. This work not only provides a strategy for constructing central nitrogen vacancies polymeric carbon nitrogen, but also affords a deep understanding of its roles in photocatalytic H2O2 production.
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Affiliation(s)
- Feng Lin
- College of Chemical and Materials Engineering, Quzhou University, Quzhou 324000, China.
| | - Tong Wang
- College of Chemical and Materials Engineering, Quzhou University, Quzhou 324000, China
| | - Zhujuan Ren
- College of Science, Nanjing Agricultural University, Nanjing 210095, China
| | - Xiaorong Cai
- Institute of Innovation & Application, National Engineering Research Central for Marine Aquaculture, Zhejiang Ocean University, Zhoushan 316022, China
| | - Yulin Wang
- College of Chemical and Materials Engineering, Quzhou University, Quzhou 324000, China
| | - Jun Chen
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China; Institute of Zhejiang University-Quzhou, Quzhou 324000, China
| | - Jianghao Wang
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China; Institute of Zhejiang University-Quzhou, Quzhou 324000, China
| | - Shaohong Zang
- Institute of Innovation & Application, National Engineering Research Central for Marine Aquaculture, Zhejiang Ocean University, Zhoushan 316022, China
| | - Feifei Mao
- College of Science, Nanjing Agricultural University, Nanjing 210095, China; State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China.
| | - Liang Lv
- College of Chemical and Materials Engineering, Quzhou University, Quzhou 324000, China.
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44
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Weng Z, Lin Y, Han B, Zhang X, Guo Q, Luo Y, Ou X, Zhou Y, Jiang J. Donor-acceptor engineered g-C 3N 4 enabling peroxymonosulfate photocatalytic conversion to 1O 2 with nearly 100% selectivity. JOURNAL OF HAZARDOUS MATERIALS 2023; 448:130869. [PMID: 36709733 DOI: 10.1016/j.jhazmat.2023.130869] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2022] [Revised: 01/12/2023] [Accepted: 01/24/2023] [Indexed: 06/18/2023]
Abstract
Singlet oxygen (1O2) is a thrilling active species for selectively oxidating organic substances. However, the efficient and selective generation of 1O2 maintains a great challenge. Here, we develop a donor-acceptor structured g-C3N4 by covalently engineering benzenetricarboxaldehyde (BTA) onto the fringe of g-C3N4. The g-C3N4-BTA exerts high-efficiency 1O2 generation with nearly 100% selectivity via peroxymonosulfate (PMS) photocatalytic activation upon visible light illumination, exhibiting obviously boosted efficiency for selective elimination of atrazine (ATZ). The consequences of experiments and theoretical calculations demonstrate that BTA units serve as electron-withdrawing sites to trap photogenerated electrons and facilitate the adsorption of PMS on the electron-deficient heptazine rings of g-C3N4. As such, PMS can be in-situ oxidated by the photogenerated holes to selectively produce 1O2. Besides, the g-C3N4-BTA/PMS system delivers high stability and strong resistance to the coexisting organic ions and natural organic matter, demonstrating great potential for selectively removing targeted organic contaminants with high efficiency.
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Affiliation(s)
- Zonglin Weng
- Key Laboratory for City Cluster Environmental Safety and Green Development of the Ministry of Education, School of Ecology, Environment and Resources, Guangdong University of Technology, Guangzhou 510006, PR China
| | - Yuanfang Lin
- Key Laboratory for City Cluster Environmental Safety and Green Development of the Ministry of Education, School of Ecology, Environment and Resources, Guangdong University of Technology, Guangzhou 510006, PR China
| | - Bin Han
- Key Laboratory for City Cluster Environmental Safety and Green Development of the Ministry of Education, School of Ecology, Environment and Resources, Guangdong University of Technology, Guangzhou 510006, PR China.
| | - Xinfei Zhang
- Key Laboratory for City Cluster Environmental Safety and Green Development of the Ministry of Education, School of Ecology, Environment and Resources, Guangdong University of Technology, Guangzhou 510006, PR China
| | - Qin Guo
- Key Laboratory for City Cluster Environmental Safety and Green Development of the Ministry of Education, School of Ecology, Environment and Resources, Guangdong University of Technology, Guangzhou 510006, PR China
| | - Yu Luo
- Key Laboratory for City Cluster Environmental Safety and Green Development of the Ministry of Education, School of Ecology, Environment and Resources, Guangdong University of Technology, Guangzhou 510006, PR China
| | - Xinwen Ou
- Department of Physics, Zhejiang University, Zheda Road 38, Hangzhou 310027, PR China
| | - Yang Zhou
- Key Laboratory for City Cluster Environmental Safety and Green Development of the Ministry of Education, School of Ecology, Environment and Resources, Guangdong University of Technology, Guangzhou 510006, PR China
| | - Jin Jiang
- Key Laboratory for City Cluster Environmental Safety and Green Development of the Ministry of Education, School of Ecology, Environment and Resources, Guangdong University of Technology, Guangzhou 510006, PR China
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Lu T, Zhao H, Jian L, Ji R, Pan C, Wang G, Dong Y, Zhu Y. Photocatalysis-self-Fenton system over edge covalently modified g-C 3N 4 with high mineralization of persistent organic pollutants. ENVIRONMENTAL RESEARCH 2023; 222:115361. [PMID: 36716807 DOI: 10.1016/j.envres.2023.115361] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Revised: 01/16/2023] [Accepted: 01/23/2023] [Indexed: 06/18/2023]
Abstract
The Fenton process is a widely used to remedy organic wastewaters, but it has problems of adding H2O2, low utilization efficiency of H2O2 and low mineralization efficiency. Here, a new photocatalysis-self-Fenton process was exploited for the removal of persistent 4-chlorophenol (4-CP) pollutant through coupling the photocatalysis of 4-carboxyphenylboronic acid edge covalently modified g-C3N4 (CPBA-CN) with Fenton. In this process, H2O2 was in situ generated via photocatalysis over CPBA-CN, the photogenerated electrons assisted the accelerated regeneration of Fe2+ to improve the utilization efficiency of H2O2, and the photogenerated holes facilitated the enhancement of 4-CP mineralization. Under the conjugation of CPBA, the electronic structure of CN was optimized and the molecular dipole was enhanced, resulting in the deepening valence band position, accelerated electron-hole pair separation, and improved O2 adsorption-activation. Therefore, the incremental 4-CP degradation rate in the CPBA-CN photocatalysis-self-Fenton process was approaching 0.099 min-1, by a factor of 3.1 times compared with photocatalysis. The parallel mineralization efficiency increased to 74.6% that was 2.1 and 2.6 times than photocatalysis and Fenton, respectively. In addition, this system maintained an excellent stability in the recycle experiment and can be potentially applied in a wide range of pHs and under the coexistence of various ions. This study would provide new insights for improving Fenton process and promote further development of Fenton in organic wastewater purification.
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Affiliation(s)
- Tongbin Lu
- International Joint Research Center for Photo-responsive Molecules and Materials, School of Chemical and Material Engineering, Jiangnan University, Wuxi, 214122, China
| | - Hui Zhao
- International Joint Research Center for Photo-responsive Molecules and Materials, School of Chemical and Material Engineering, Jiangnan University, Wuxi, 214122, China
| | - Liang Jian
- International Joint Research Center for Photo-responsive Molecules and Materials, School of Chemical and Material Engineering, Jiangnan University, Wuxi, 214122, China
| | - Rong Ji
- International Joint Research Center for Photo-responsive Molecules and Materials, School of Chemical and Material Engineering, Jiangnan University, Wuxi, 214122, China
| | - Chengsi Pan
- International Joint Research Center for Photo-responsive Molecules and Materials, School of Chemical and Material Engineering, Jiangnan University, Wuxi, 214122, China
| | - Guangli Wang
- International Joint Research Center for Photo-responsive Molecules and Materials, School of Chemical and Material Engineering, Jiangnan University, Wuxi, 214122, China.
| | - Yuming Dong
- International Joint Research Center for Photo-responsive Molecules and Materials, School of Chemical and Material Engineering, Jiangnan University, Wuxi, 214122, China.
| | - Yongfa Zhu
- International Joint Research Center for Photo-responsive Molecules and Materials, School of Chemical and Material Engineering, Jiangnan University, Wuxi, 214122, China; Department of Chemistry, Tsinghua University, Beijing, 100084, China
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Liu C, He X, Xu Q, Chen M. A general way to realize the bi-directional promotion effects on the photocatalytic removal of heavy metals and organic pollutants in real water by a novel S-scheme heterojunction: Experimental investigations, QSAR and DFT calculations. JOURNAL OF HAZARDOUS MATERIALS 2023; 445:130551. [PMID: 37055965 DOI: 10.1016/j.jhazmat.2022.130551] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Revised: 11/16/2022] [Accepted: 12/03/2022] [Indexed: 06/19/2023]
Abstract
Heavy metals (HMs) often coexist with organic pollutants (OPs) in real surface water. Is it possible to find a general way that the removal of one from these two pollutants will promote the elimination of another pollutant? Herein, the bi-directional promotion effects (BPEs) on synchronous removal of Cr(VI) (i.e., hexavalent chromium) and OPs were achieved by a SnNb2O6/CuInS2 S-scheme heterojunction. Specifically, the apparent rate constants are 0.161 min-1 [(Cr(VI)] and 0.019 min-1 [Tetracycline hydrochloride (TCH)] in coexisting Cr(VI)/TCH system (which are 3.74 and 1.58 times, respectively, compared to the mono-pollutant system), indicating OPs indeed can act as hole scavengers (electron donors) to consume plenty of photoinduced holes and enable more photoexcited electrons to attend to Cr(VI) photoreduction. More significantly, OPs (i.e., TCH, atrazine and 4-chlorophenol) with different molecular structures possess different adiabatic ionization potentials (AIPs), in an inversely linear relationship with BPEs, i.e., the lower AIP value is, the higher electron-donating ability is, the better BPEs present. Finally, TCH and its degradation intermediates toxicity was forecasted via quantitative structure-activity relationship, demonstrating the toxicity decrease of TCH during the photocatalytic process. This work provides a general strategy for simultaneous removal of contaminants, contributing to wastewater purification.
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Affiliation(s)
- Chen Liu
- Key Laboratory of Reservoir Aquatic Environment, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China; Chongqing School, University of Chinese Academy of Sciences, Chongqing 400714, China
| | - Xinxia He
- Key Laboratory of Reservoir Aquatic Environment, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China; Chongqing School, University of Chinese Academy of Sciences, Chongqing 400714, China
| | - Qixuan Xu
- Key Laboratory of Reservoir Aquatic Environment, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China; Chongqing School, University of Chinese Academy of Sciences, Chongqing 400714, China
| | - Ming Chen
- Key Laboratory of Reservoir Aquatic Environment, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China; Chongqing School, University of Chinese Academy of Sciences, Chongqing 400714, China.
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47
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Lu Z, Li B, Wei B, Zhou G, Xu Y, Zhang J, Chen H, Hua S, Wu C, Liu X. NMP-induced surface self-corrosion-assisted rapid spin-coating method for synthesizing imprinted heterojunction photocatalyst anchored membrane towards high-efficiency selective degradation tetracycline. Sep Purif Technol 2023. [DOI: 10.1016/j.seppur.2023.123609] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/18/2023]
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Yu H, Dai M, Zhang J, Chen W, Jin Q, Wang S, He Z. Interface Engineering in 2D/2D Heterogeneous Photocatalysts. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2205767. [PMID: 36478659 DOI: 10.1002/smll.202205767] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Revised: 11/06/2022] [Indexed: 06/17/2023]
Abstract
Assembling different 2D nanomaterials into heterostructures with strong interfacial interactions presents a promising approach for novel artificial photocatalytic materials. Chemically implementing the 2D nanomaterials' construction/stacking modes to regulate different interfaces can extend their functionalities and achieve good performance. Herein, based on different fundamental principles and photochemical processes, multiple construction modes (e.g., face-to-face, edge-to-face, interface-to-face, edge-to-edge) are overviewed systematically with emphasis on the relationships between their interfacial characteristics (e.g., point, linear, planar), synthetic strategies (e.g., in situ growth, ex situ assembly), and enhanced applications to achieve precise regulation. Meanwhile, recent efforts for enhancing photocatalytic performances of 2D/2D heterostructures are summarized from the critical factors of enhancing visible light absorption, accelerating charge transfer/separation, and introducing novel active sites. Notably, the crucial roles of surface defects, cocatalysts, and surface modification for photocatalytic performance optimization of 2D/2D heterostructures are also discussed based on the synergistic effect of optimization engineering and heterogeneous interfaces. Finally, perspectives and challenges are proposed to emphasize future opportunities for expanding 2D/2D heterostructures for photocatalysis.
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Affiliation(s)
- Huijun Yu
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao, 266237, China
| | - Meng Dai
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao, 266237, China
| | - Jing Zhang
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao, 266237, China
| | - Wenhan Chen
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao, 266237, China
| | - Qiu Jin
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao, 266237, China
| | - Shuguang Wang
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao, 266237, China
| | - Zuoli He
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao, 266237, China
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Xia X, Xie C, Che Q, Yang P. Potassium-Derived Charge Channels in Boron-Doped g-C 3N 4 Nanosheets for Photocatalytic NO Oxidation and Hydrogen Evolution. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:1250-1261. [PMID: 36623173 DOI: 10.1021/acs.langmuir.2c03035] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
The application of graphitic carbon nitride (g-C3N4) in photocatalytic NO oxidation was limited due to severe recombination of photogenerated carriers and low concentration of oxidizing species. In this work, K and B were introduced into the interlayer and in-plane framework of g-C3N4 to address this challenge through the thermal polymerization process. The synthesized K-doped B-g-C3N4 nanosheets exhibited expanded light absorption and low charge recombination efficiency. In addition, the doping of K and B reduced the band gap of g-C3N4, which corresponded to enhanced light absorption. B was introduced into the in-plane structure by replacing C atoms, which adjusted the in-plane electron distribution. K was inserted into the interlayer by binding to the N and C atoms of adjacent layers. K-derived electron transfer channels were constructed, which increased electron delocalization and expanded the π-conjugate system. More electrons were transferred through the interlayer channels and were involved in the reaction process. The severe carrier recombination and weak transfer were improved due to the synergistic effect of K and B doping. K-doped B-g-C3N4 nanosheets exhibited enhanced generation of superoxide radicals and hydroxyl radicals, which played a key role during NO oxidation. The photocatalytic NO oxidation efficiency of codoped g-C3N4 nanosheets reached 61%, which was 2.1 and 1.2 times of that of pristine g-C3N4 and B-doped g-C3N4, respectively. The codoped g-C3N4 sample still exhibited stable photocatalytic NO oxidation efficiency after five cycles. This result provided a potential idea for improving the charge distribution and transfer of layered materials by codoping metallic and nonmetallic elements and for photocatalytic NO oxidation.
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Affiliation(s)
- Xiang Xia
- School of Material Science and Engineering, University of Jinan, Jinan250022, P. R. China
| | - Cong Xie
- School of Material Science and Engineering, University of Jinan, Jinan250022, P. R. China
| | - Quande Che
- School of Material Science and Engineering, University of Jinan, Jinan250022, P. R. China
| | - Ping Yang
- School of Material Science and Engineering, University of Jinan, Jinan250022, P. R. China
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Zhang P, Li Y, Li X. Solar to H2O2 in-situ generation and utilization: A self-cyclable photocatalytic Fenton-like system. CHINESE JOURNAL OF CATALYSIS 2023. [DOI: 10.1016/s1872-2067(22)64185-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
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