1
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Fang H, Zhang Y, Xu J, Xing J, Lin H, Wang L. Introducing Br, K, and cyano group into carbon nitride for efficient photocatalytic hydrogen peroxide production then in situ tetracycline mineralization. J Colloid Interface Sci 2024; 667:433-440. [PMID: 38640662 DOI: 10.1016/j.jcis.2024.04.104] [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: 02/17/2024] [Revised: 04/05/2024] [Accepted: 04/15/2024] [Indexed: 04/21/2024]
Abstract
In this work, Br, K-doped and cyano group-rich carbon nitride (CN) were prepared via pyrolysis of molten urea and 6-Bromopyridine-3-carbaldehyde, followed by re-calcination with potassium thiocyanate. The hydrogen peroxide (H2O2) evolution and in situ tetracycline (TC) mineralization performances of the prepared samples were studied. The optimal sample could produce 9127 μmol g-1 h-1 H2O2 from 10 vol% ethanol solution and air atmosphere, which was 10.9 times higher than that of pristine CN. With addition of 4 mg L-1 Fe2+ ions, 97.2% of TC (10 mg L-1) and 98.7% of total organic carbon were removed in 30 min under the actions of holes, hydroxyl and superoxide radicals. The high H2O2 yield and TC mineralization ratio were attributed to the increased light absorption, efficient electrons-holes separation, enhanced surface O2 adsorption (0.3878 mmol g-1), and accelerated conversion from Fe3+ to Fe2+ ions. Meanwhile, the system possessed good reusability in H2O2 evolution and TC removal. It is expected that this work can provide new ideas to design CN-based photo-Fenton system to treat wastewater.
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Affiliation(s)
- Huawei Fang
- Key Laboratory of Eco-chemical Engineering, Taishan Scholar Advantage and Characteristic Discipline Team of Eco-Chemical Process and Technology, Qingdao University of Science and Technology, Qingdao 266042, China; College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
| | - Yu Zhang
- Key Laboratory of Eco-chemical Engineering, Taishan Scholar Advantage and Characteristic Discipline Team of Eco-Chemical Process and Technology, Qingdao University of Science and Technology, Qingdao 266042, China; College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
| | - Jixiang Xu
- Key Laboratory of Eco-chemical Engineering, Taishan Scholar Advantage and Characteristic Discipline Team of Eco-Chemical Process and Technology, Qingdao University of Science and Technology, Qingdao 266042, China; College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China.
| | - Jun Xing
- Key Laboratory of Eco-chemical Engineering, Taishan Scholar Advantage and Characteristic Discipline Team of Eco-Chemical Process and Technology, Qingdao University of Science and Technology, Qingdao 266042, China; College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
| | - Haifeng Lin
- Key Laboratory of Eco-chemical Engineering, Taishan Scholar Advantage and Characteristic Discipline Team of Eco-Chemical Process and Technology, Qingdao University of Science and Technology, Qingdao 266042, China; College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
| | - Lei Wang
- Key Laboratory of Eco-chemical Engineering, Taishan Scholar Advantage and Characteristic Discipline Team of Eco-Chemical Process and Technology, Qingdao University of Science and Technology, Qingdao 266042, China; College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China.
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Yang H, Wang J, Zhao R, Hou L. Precise Regulation in Chain-Edge Structural Microenvironments of 1D Covalent Organic Frameworks for Photocatalysis. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024:e2400688. [PMID: 38659172 DOI: 10.1002/smll.202400688] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2024] [Revised: 03/12/2024] [Indexed: 04/26/2024]
Abstract
Covalent organic frameworks (COFs) constitute a promising research topic for photocatalytic reactions, but the rules and conformational relationships of 1D COFs are poorly defined. Herein, the chain edge structure is designed by precise modulation at the atomic level, and the 1D COFs bonded by C, O, and S elements is directionally prepared for oxygen-tolerant photoinduced electron transfer-atom transfer radical polymerization (PET-ATRP) reactions. It is demonstrated that heteroatom-type chain edge structures (─O─, ─S─) lead to a decrease in intra-plane conjugation, which restricts the effective transport of photogenerated electrons along the direction of the 1D strip. In contrast, the all-carbon type chain edge structure (─C─) with higher intra-plane conjugation not only reduces the energy loss of photoexcited electrons but also enhances the carrier density, which exhibits the optimal photopolymerization performance. This work offers valuable guidance in the exploitation of 1D COFs for high photocatalytic performance. This work offers valuable guidance in the exploitation of 1D COFs for high photocatalytic performance.
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Affiliation(s)
- Hongjie Yang
- Department of Materials-Oriented Chemical Engineering, School of Chemical Engineering, Fuzhou University, Fuzhou, 350116, P. R. China
| | - Jinfeng Wang
- Department of Materials-Oriented Chemical Engineering, School of Chemical Engineering, Fuzhou University, Fuzhou, 350116, P. R. China
| | - Rui Zhao
- Qingyuan Innovation Laboratory, Quanzhou, 362801, P. R. China
| | - Linxi Hou
- Department of Materials-Oriented Chemical Engineering, School of Chemical Engineering, Fuzhou University, Fuzhou, 350116, P. R. China
- Qingyuan Innovation Laboratory, Quanzhou, 362801, P. R. China
- Department of Chemical Engineering, Zhicheng College of Fuzhou University, Fuzhou, 350116, P. R. China
- Fujian Key Laboratory of Advanced Manufacturing Technology of Specialty Chemicals, Fuzhou University, Fuzhou, 350116, P. R. China
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3
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Zhang X, Wu F, Li G, Wang L, Huang J, Song A, Meng A, Li Z. Construction of intramolecular donor-acceptor type carbon nitride for photocatalytic hydrogen production. J Colloid Interface Sci 2024; 655:439-450. [PMID: 37951001 DOI: 10.1016/j.jcis.2023.10.152] [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: 09/05/2023] [Revised: 10/19/2023] [Accepted: 10/29/2023] [Indexed: 11/13/2023]
Abstract
High-efficiency photocatalysts based on organic polymeric semiconductor are often limited by slow charge separation kinetics and sluggish redox reaction dynamics. Herein, the donor-acceptor conjugated polymeric carbon nitride (D/A-CN) was synthesized by grafting benzene ring and pyridine moiety into the backbone of CN through a flexible pyrolysis strategy. The D/A-CN shows a high photocatalytic H2 evolution rate of 4795 µmol·h-1·g-1, which is ≈6.08 times higher than that of pristine CN (787.5 µmol·h-1·g-1). Both experimental and theoretical results confirm that the robust internal electric field is established in the D/A-CN framework due to the enhanced molecular dipole, which apply a kinetic force to facilitate the separation and mobility of photogenerated carriers. Meanwhile, the deeper conduction band potential caused by the elevated orbital energy level of D/A-CN contributes to the enhanced reduction ability of photoinduced electron. Consequently, the faster carrier transfer kinetics and the stronger thermodynamic reduction driving force synergistically lead to efficient photocatalytic H2 production of D/A-CN. This work reinforces the comprehension of the structure-performance relationship of donor-acceptor structural photocatalysts and provides an insight for enhancing the photocatalytic activity of polymeric photocatalysts at the molecular level.
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Affiliation(s)
- Xinlei Zhang
- College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, PR China
| | - Fei Wu
- College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, PR China
| | - Guicun Li
- College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, PR China
| | - Lei Wang
- Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, PR China
| | - Jianfeng Huang
- School of Material Science and Engineering, Xi'an Key Laboratory of Green Manufacture of Ceramic Materials, Shaanxi University of Science and Technology, Xi'an 710021, PR China
| | - Aili Song
- Qingdao Huanghai University, Qingdao 266000, PR China
| | - Alan Meng
- Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, PR China.
| | - Zhenjiang Li
- College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, PR China.
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4
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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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Chava RK, Kang M. Ordered and carbon-doped porous polymeric graphitic carbon nitride nanosheets toward enhanced visible light absorption and efficient photocatalytic H 2 evolution. NANOSCALE 2023; 15:18347-18358. [PMID: 37921504 DOI: 10.1039/d3nr04270g] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2023]
Abstract
An effective and rational pathway to tune the electronic bandstructure and visible light absorption properties of low-cost organic graphitic carbon nitride (g-C3N4, GCN) photocatalysts is still very challenging. Here, an efficient strategy is validated to tailor the bandstructure of g-C3N4 and C-doping can be regulated by polymerizing melamine with malonic acid, which can greatly extend the photoresponse range to 900 nm. The optimized GCN exhibits an improved photocatalytic hydrogen production rate of 663.6 μmol g-1 h-1 under visible light irradiation and an apparent quantum yield of 11% at 420 nm, which is three times higher than that of traditional bulk g-C3N4. This superior performance is derived from the unique ordered and porous structure of GCN, which effectively improves its light absorption and provides a larger specific surface area. In addition, the introduction of malonic acid into melamine and the subsequent thermal polymerization reaction further optimize the band structure of GCN, extend its light absorption via C-doping, and improve the photoinduced charge separation, resulting in high photocatalytic performance. This strategy provides a novel platform to design highly efficient GCN-based photocatalysts with precisely tunable operation windows and enhanced charge separation.
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Affiliation(s)
- Rama Krishna Chava
- Department of Chemistry, College of Natural Sciences, Yeungnam University, 280 Daehak-Ro, Gyeongsan, Gyeongbuk 38541, Republic of Korea.
| | - Misook Kang
- Department of Chemistry, College of Natural Sciences, Yeungnam University, 280 Daehak-Ro, Gyeongsan, Gyeongbuk 38541, Republic of Korea.
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6
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Lu M, Zhang H, Tian Y, Yao W, Wang J, Wang Y. Photocatalytic hydrogel film assisted forward osmosis (PFO) for water treatment: Sustainable performance and contaminant control. JOURNAL OF HAZARDOUS MATERIALS 2023; 460:132364. [PMID: 37634380 DOI: 10.1016/j.jhazmat.2023.132364] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Revised: 08/11/2023] [Accepted: 08/20/2023] [Indexed: 08/29/2023]
Abstract
The integration of catalytic oxidation with forward osmosis (FO) holds promising potential to address two crucial challenges encountered by FO: fouling and unsustainable performance, but suitable approaches are still rare. Herein, we have successfully developed a photocatalysis-assisted forward osmosis (PFO) system. In the PFO, a self-made porous carbon nitride doped functional carbon nanotube photocatalytic hydrogel film (PCN@CNTM) was engaged in the FO process in an inventive way by simply sticking to the commercial FO membrane surface, preventing damage to the membrane from the catalyst's direct insertion and delaying the assault from the oxidation groups. PFO allowed organic pollutants to decompose in the feed solution (90%) and on the membrane surface, regulating the water chemical potential and giving the FO membrane antifouling properties. This resulted in sustainable water flux (11.8 LMH) with no significant membrane fouling in PFO, whereas in FO alone there was a significant fouling and flux drop (from 12.73 to 7.23 LMH in 4 h). Moreover, the expensive FO membrane was protected while the hydrogel film can be replaced on demand. The PFO exemplifies the concept of synergistic technology integration, presenting a new perspective on harnessing the strengths of distinct technologies in a mutually beneficial manner.
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Affiliation(s)
- Mengyang Lu
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, MOE), School of Environmental Science and Technology, Dalian University of Technology, Linggong Road 2, Dalian 116024, China
| | - Hanmin Zhang
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, MOE), School of Environmental Science and Technology, Dalian University of Technology, Linggong Road 2, Dalian 116024, China.
| | - Yu Tian
- State Key Laboratory of Urban Water Resource and Environment (SKLUWRE) School of Environment, Harbin Institute of Technology, Harbin 150090, China.
| | - Wei Yao
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, MOE), School of Environmental Science and Technology, Dalian University of Technology, Linggong Road 2, Dalian 116024, China
| | - Junsheng Wang
- Liaoning Key Laboratory of Marine Sensing and Intelligent Detection, Dalian Maritime University, Dalian 116026, China
| | - Yuezhu Wang
- Liaoning Key Laboratory of Marine Sensing and Intelligent Detection, Dalian Maritime University, Dalian 116026, China
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7
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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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Li Q, Jiao Y, Tang Y, Zhou J, Wu B, Jiang B, Fu H. Shear Stress Triggers Ultrathin-Nanosheet Carbon Nitride Assembly for Photocatalytic H 2O 2 Production Coupled with Selective Alcohol Oxidation. J Am Chem Soc 2023; 145:20837-20848. [PMID: 37625395 DOI: 10.1021/jacs.3c05234] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/27/2023]
Abstract
Coupled photocatalysis without cocatalysts can maximize the utilization of photons and atoms, which puts forward higher demands on photocatalysts. Polymeric carbon nitride (CN) has become the most promising photocatalyst, but still suffers from major drawbacks of insufficient catalytic sites and low quantum efficiency. Herein, we report a fluid shear stress-assisted molecular assembly to prepare ultrathin-nanosheet-assembled acanthosphere-like CN (ASCN) with nitrogen vacancy (Nv) and carbonyl modification. Shear stress breaks the stacking interactions between layers and cuts the stacked structure into ultrathin layers, which are further reassembled into acanthosphere bundles driven by "centrifugal force". Benefitted greatly from the ultrathin nature that provides more exposed active sites and improves charge carrier separation, ASCN-3 exhibits a 20-fold higher activity than the bulk counterpart toward oxygen reduction to H2O2 coupled with 4-methoxybenzyl alcohol (4-MBA) oxidation to anisaldehyde (AA), with significantly increased turnover frequency (TOF) values (TOF: 1.69 h-1 for H2O2 and 1.02 h-1 for AA). Significantly, ASCN-3 exhibits 95.8% conversion for 4-MBA oxidation with nearly 100% selectivity. High apparent quantum yields of 11.7% and 9.3% at 420 nm are achieved for H2O2 photosynthesis and 4-MBA oxidation. Mechanism studies suggest that carbonyl induces holes concentrated at the neighboring melem unit to directly oxidize the Cα-H bond of 4-MBA to produce carbon radicals, and Nv as oxygen adsorption active site traps electrons to form a superoxide radical that further combines with the shed protons into H2O2. This work presents a simple physical method to break the layered stack of CN for creating hierarchical assembly for coupled photocatalysis.
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Affiliation(s)
- Qi Li
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, P. R. China
| | - Yanqing Jiao
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, P. R. China
| | - Yunqi Tang
- School of Energy and Environment & Department of Materials Science and Engineering, City University of Hong Kong, Kowloon Tong, Hong Kong 999077, P. R. China
| | - Jing Zhou
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, P. R. China
| | - Baogang Wu
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, P. R. China
| | - Baojiang Jiang
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, P. R. China
| | - Honggang Fu
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, P. R. China
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Liu Z, Zhang J, Li X, Cui R, Ma J, Sun R. Simultaneous photocatalytic biomass conversion and CO 2 reduction over high crystalline oxygen-doped carbon nitride. iScience 2023; 26:107416. [PMID: 37564699 PMCID: PMC10410522 DOI: 10.1016/j.isci.2023.107416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2023] [Revised: 06/26/2023] [Accepted: 07/14/2023] [Indexed: 08/12/2023] Open
Abstract
Simultaneous photocatalytic biorefinery and CO2 reduction to co-produce fuels and high value-added chemicals have recently attracted significant attention; however, comprehensive studies are still lacking. Herein, we report the preparation of highly crystalline oxygen-doped carbon nitride nanotubes (O-CNNTs-x) using an ammonium fluoride-assisted hydrothermal/calcination strategy. The hollow structure, high crystallinity, and O incorporation endowed the O-CNNTs-x with photocatalytic activity by considerably improving optical absorption and modulating the charge carrier motion. The lactic acid yield and CO evolution rate over O-CNNTs-2.0 reached 82.08% and 67.95 μmol g-1 h-1, which are 1.57- and 7.37-fold times higher than those of CN, respectively. Moreover, ·OH plays a key role in the oxidation half-reaction. This study offers a facile approach for fabricating highly crystalline element-doped CN with a customizable morphology and electronic properties and demonstrates the viability of co-photocatalytic CO2 reduction and biomass selective oxidation.
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Affiliation(s)
- Zhendong Liu
- Liaoning Key Lab of Lignocellulose Chemistry and BioMaterials, Liaoning Collaborative Innovation Center for Lignocellulosic Biorefinery, College of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian 116034, China
| | - Junqiang Zhang
- Liaoning Key Lab of Lignocellulose Chemistry and BioMaterials, Liaoning Collaborative Innovation Center for Lignocellulosic Biorefinery, College of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian 116034, China
| | - Xinze Li
- Liaoning Key Lab of Lignocellulose Chemistry and BioMaterials, Liaoning Collaborative Innovation Center for Lignocellulosic Biorefinery, College of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian 116034, China
| | - Rui Cui
- Liaoning Key Lab of Lignocellulose Chemistry and BioMaterials, Liaoning Collaborative Innovation Center for Lignocellulosic Biorefinery, College of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian 116034, China
| | - Jiliang Ma
- Liaoning Key Lab of Lignocellulose Chemistry and BioMaterials, Liaoning Collaborative Innovation Center for Lignocellulosic Biorefinery, College of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian 116034, China
| | - Runcang Sun
- Liaoning Key Lab of Lignocellulose Chemistry and BioMaterials, Liaoning Collaborative Innovation Center for Lignocellulosic Biorefinery, College of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian 116034, China
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Lu M, Zhang H, Tian Y. The collaborative incentive effect in adsorption-photocatalysis: A special perspective on phosphorus recovery and reuse. WATER RESEARCH 2023; 242:120237. [PMID: 37393809 DOI: 10.1016/j.watres.2023.120237] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Revised: 06/10/2023] [Accepted: 06/16/2023] [Indexed: 07/04/2023]
Abstract
Achieving efficient recovery and direct utilization of phosphorus as one of the important components of the green economy is a huge challenge. Herein, we innovatively constructed a coupling adsorption-photocatalytic (CAP) process using synthetic dual-functional Mg-modified carbon nitride (CN-MgO). The CAP could utilize the recovered phosphorus from wastewater to promote the in-situ degradation of refractory organic pollutants via CN-MgO, where its phosphorus adsorption capacity and photocatalytic activity were significantly and synergistically increased. It was specifically reflected in the high phosphorus adsorption capacity of CN-MgO (218 mg/g), which was 153.5 times that of carbon nitride (1.42 mg/g), and its theoretical maximum adsorption capacity could reach 332 mg P/g. Subsequently, the phosphorus-enriched sample (CN-MgO-P) was employed as a photocatalyst to remove tetracycline with a reaction rate (k = 0.07177 min-1) 2.33 times higher than that of carbon nitride (k = 0.0327 min-1). Notably, the coordinated incentive mechanism present in this CAP between adsorption and photocatalysis may be attributed to the more adsorption sites of CN-MgO and the facilitation of hydroxyl production through adsorbed phosphorus, which ensured the feasibility of creating environmental value from the phosphorus in wastewater by means of CAP. This study provides a new perspective on the recovery and reuse of phosphorus resources in wastewater and the integration of environmental technologies in multiple fields.
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Affiliation(s)
- Mengyang Lu
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, MOE), School of Environmental Science and Technology, Dalian University of Technology, Linggong Road 2, Dalian 116024, China
| | - Hanmin Zhang
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, MOE), School of Environmental Science and Technology, Dalian University of Technology, Linggong Road 2, Dalian 116024, China.
| | - Yu Tian
- State Key Laboratory of Urban Water Resource and Environment (SKLUWRE), School of Environment, Harbin Institute of Technology, Harbin 150090, China.
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Shen R, Liang G, Hao L, Zhang P, Li X. In Situ Synthesis of Chemically Bonded 2D/2D Covalent Organic Frameworks/O-Vacancy WO 3 Z-Scheme Heterostructure for Photocatalytic Overall Water Splitting. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2303649. [PMID: 37319036 DOI: 10.1002/adma.202303649] [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: 04/19/2023] [Revised: 05/29/2023] [Indexed: 06/17/2023]
Abstract
Covalent organic frameworks (COFs) have shown great promise for photocatalytic hydrogen evolution via water splitting. However, the four-electron oxidation of water remains elusive toward oxygen evolution. Enabling this water oxidation pathway is critical to improve the yield and maximize atom utilization efficiency. A Z-scheme heterojunction is proposed for overcoming fundamental issues in COF-based photocatalytic overall water splitting (OWS), such as inefficient light absorption, charge recombination, and poor water oxidation ability. It is shown that the construction of a novel 2D/2D Z-scheme heterojunction through in situ growth of COFs on the O-vacancy WO3 nanosheets (Ov-WO3 ) via the WOC chemical bond can remarkably promote photocatalytic OWS. Benefiting from the synergistic effect between the enhanced built-in electric field by the interfacial WOC bond, the strong water oxidation ability of Ov-WO3, and the ultrathin structure of TSCOF, both separation and utilization efficiency of photogenerated electron-hole pairs can be significantly enhanced. An impressive photocatalytic hydrogen evolution half-rection rate of 593 mmol h-1 g-1 and overall water splitting rate of 146 (hydrogen) and 68 (oxygen) µmol h-1 g-1 are achieved on the COF-WO3 (TSCOFW) composite. This 2D/2D Z-scheme heterojunction with two-step excitation and precisely cascaded charge-transfer pathway makes it responsible for the efficient solar-driven OWS without a sacrificial agent.
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Affiliation(s)
- Rongchen Shen
- Institute of Biomass Engineering, Key Laboratory of Energy Plants Resource and Utilization, Ministry of Agriculture and Rural Affairs, South China Agricultural University, Guangzhou, 510642, P. R. China
| | - Guijie Liang
- Hubei Key Lab Low Dimens Optoelect Mat & Devices, Hubei University of Arts and Science, Xiangyang, 441053, P. R. China
| | - Lei Hao
- Institute of Biomass Engineering, Key Laboratory of Energy Plants Resource and Utilization, Ministry of Agriculture and Rural Affairs, South China Agricultural University, Guangzhou, 510642, P. R. China
| | - Peng Zhang
- State Centre for International Cooperation on Designer Low-Carbon & Environmental Materials (CDLCEM), School of Materials Science and Engineering, Zhengzhou University, Zhengzhou, Henan, 450001, P. R. China
| | - Xin Li
- Institute of Biomass Engineering, Key Laboratory of Energy Plants Resource and Utilization, Ministry of Agriculture and Rural Affairs, South China Agricultural University, Guangzhou, 510642, P. R. China
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12
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Tang S, Xu YS, Hu XL, Zhang WD. Bifunctionalization of carbon nitride by incorporation of thiophene ring and polar nickel complex to promote photocatalytic activity for hydrogen evolution. J Colloid Interface Sci 2023; 648:898-906. [PMID: 37329601 DOI: 10.1016/j.jcis.2023.06.055] [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: 03/30/2023] [Revised: 06/03/2023] [Accepted: 06/09/2023] [Indexed: 06/19/2023]
Abstract
Photocatalytic performance of polymeric carbon nitride (CN) is primarily restricted by limited light utilization and poor charge separation efficiency. To this end, skeleton modification strategy was adopted by attaching thiophene ring and polar nickel complex (NiL) onto CN. The obtained bifunctionalized carbon nitride (TCN-NiL) displayed obviously elevated optical absorption and photoexcited charge separation efficiency. The NiL, with polar structure, plays as active sites like cocatalyst thus exhibited platinum-like H2 evolution activity from water splitting under visible light. The optimized photocatalytic H2 generation rate over TCN-NiL reached 136.7 μmol·h-1 without any cocatalyst, the highest rate reported so far in noble-metal-free CN-based catalysts, which is 5 times of that of CN loaded with 3 wt% Pt. Additionally, the maximum wavelength of performing H2 production capacity over TCN-NiL extends to 550 nm from 450 nm of CN, suggesting an excellent visible light absorption ability. This work provides a way for modifying CN to enhance the photocatalytic activities in a noble metal free system.
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Affiliation(s)
- Shuang Tang
- School of Chemistry and Chemical Engineering, South China University of Technology, 381 Wushan Road, Guangzhou 510640, PR China
| | - Yang-Sen Xu
- Institute of Information Technology, Shenzhen Institute of Information Technology, Shenzhen 518172, PR China
| | - Xue-Lian Hu
- School of Chemistry and Chemical Engineering, South China University of Technology, 381 Wushan Road, Guangzhou 510640, PR China
| | - Wei-De Zhang
- School of Chemistry and Chemical Engineering, South China University of Technology, 381 Wushan Road, Guangzhou 510640, PR China.
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13
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Tang X, Tang R, Zhou Z, Li L, Deng Y, Gong D, Yang L, Song T, He M. Facile design of surface electric field driven tourmaline/g-C 3N 4 layered stacked photocatalysts with enhanced photocatalytic activity for antibiotic removal. CHEMOSPHERE 2023:139185. [PMID: 37302491 DOI: 10.1016/j.chemosphere.2023.139185] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2023] [Revised: 06/08/2023] [Accepted: 06/09/2023] [Indexed: 06/13/2023]
Abstract
In the field of photocatalysis, Graphitic carbon nitride (g-C3N4) has received a lot of attention for its superior functionality and benefits. However, it suffers from the fatal defect of low charge separation efficiency, which is well addressed by tourmaline's self-contained surface electric field. In this work, tourmaline/g-C3N4 (T/CN) composites were successfully synthesized. Due to its surface electric field effect, tourmaline and g-C3N4 are stacked on top of each other. It makes its specific surface area increase greatly and more active sites are exposed. Additionally, the rapid separation of photogenerated electron holes under the action of electric field promotes the photocatalytic reaction. T/CN exhibited excellent photocatalytic performance under visible light, with 99.9% Tetracycline (TC 50 mg L-1) removal after 30 min. Compared to tourmaline (0.0160 min-1) and g-C3N4 (0.0230 min-1), the T/CN composite's reaction rate constant (0.1754 min-1) was 11.0 and 7.6 times higher. A series of characterizations also determined the structural properties and catalytic performance of the T/CN composites, which were found to have a larger specific surface area, narrower band gap, and higher charge separation efficiency compared to the monomer. In addition, the toxicity of tetracycline intermediates and their degradative pathways were investigated, and the toxicity of the intermediates was found to be reduced. Given the quenching experiments and active substance determination, it was also found that h+ and ·O2- play a major role. This work provides more inspiration for photocatalytic material performance research as well as green innovation for environmental management.
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Affiliation(s)
- Xiangwei Tang
- College of Environment & Ecology, Hunan Agricultural University, Changsha, 410128, China
| | - Rongdi Tang
- College of Environment & Ecology, Hunan Agricultural University, Changsha, 410128, China; College of Environmental Science and Engineering, Hunan University, Changsha, 410082, China.
| | - Zhanpeng Zhou
- College of Environment & Ecology, Hunan Agricultural University, Changsha, 410128, China
| | - Ling Li
- College of Environment & Ecology, Hunan Agricultural University, Changsha, 410128, China
| | - Yaocheng Deng
- College of Environment & Ecology, Hunan Agricultural University, Changsha, 410128, China.
| | - Daoxin Gong
- College of Environment & Ecology, Hunan Agricultural University, Changsha, 410128, China.
| | - Lihua Yang
- College of Environment & Ecology, Hunan Agricultural University, Changsha, 410128, China
| | - Tianwei Song
- College of Environment & Ecology, Hunan Agricultural University, Changsha, 410128, China
| | - Mingxuan He
- College of Environment & Ecology, Hunan Agricultural University, Changsha, 410128, China
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14
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Yang C, Yang J, Liu S, Zhao M, Duan X, Wu H, Liu L, Liu W, Li J, Ren S, Liu Q. Constructing C-O bridged CeO 2/g-C 3N 4 S-scheme heterojunction for methyl orange photodegradation:Experimental and theoretical calculation. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 335:117608. [PMID: 36867902 DOI: 10.1016/j.jenvman.2023.117608] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Revised: 02/23/2023] [Accepted: 02/25/2023] [Indexed: 06/18/2023]
Abstract
Owing to its feasibility, efficiency in light-harvesting and effectiveness in the interfacial charge transfer between two n-type semiconductors, constructing heterojunction photocatalysts have been identified as an effective way for enhancing the photocatalytic properties. In this research, a C-O bridged CeO2/g-C3N4 (cCN) Step-scheme (S-scheme) heterojunction photocatalyst was constructed successfully. Under visible light irradiation, the cCN heterojunction exhibited the photocatalytic degradation efficiency of methyl orange, which was about 4.5 and 1.5 times higher than that of pristine CeO2 and CN, respectively. The DFT calculations, XPS and FTIR analyses demonstrated the formation of C-O linkages. And the calculations of work functions revealed the electrons would flow from g-C3N4 to CeO2 due to the difference in Fermi levels, resulting in the production of internal electric fields. Benefiting from the C-O bond and internal electric field, the photo-induced holes in the valence band of g-C3N4 and the photo-induced electrons from conduction band of CeO2 would be recombined when exposed to visible light irradiation, while leaving the electrons with higher redox potential in the conduction band of g-C3N4. This collaboration accelerated the separation and transfer rate of photo-generated electron-hole pairs, which promoted the generation of superoxide radical (•O2-) and improved the photocatalytic activity.
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Affiliation(s)
- Chen Yang
- College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, China
| | - Jian Yang
- College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, China.
| | - Shuangshuang Liu
- College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, China
| | - Mingxue Zhao
- College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, China
| | - Xu Duan
- College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, China
| | - Hongli Wu
- College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, China
| | - Lang Liu
- School of Materials and Environment, Guangxi Minzu University, Nanning, Guangxi, 530006, China.
| | - Weizao Liu
- College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, China
| | - Jiangling Li
- College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, China
| | - Shan Ren
- College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, China
| | - Qingcai Liu
- College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, China
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15
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Tang R, Zeng H, Feng C, Xiong S, Li L, Zhou Z, Gong D, Tang L, Deng Y. Twisty C-TiO 2 /PCN S-Scheme Heterojunction with Enhanced n→π * Electronic Excitation for Promoted Piezo-Photocatalytic Effect. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2207636. [PMID: 36772900 DOI: 10.1002/smll.202207636] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Revised: 01/10/2023] [Indexed: 05/04/2023]
Abstract
Herein, a twisty C-TiO2 /PCN (CNT) Step-scheme (S-scheme) heterojunction is fabricated and applied to degrade ciprofloxacin (CIP) with the assistance of ultrasonic vibration and visible light irradiation. The nitrogen-rich twisty polymeric carbon nitride (PCN) can not only induce a non-centrosymmetric structure with enhanced polarity for a better piezoelectric effect but also provide abundant lone pair electrons to promote n→π* transition during photocatalysis. Its hybridization with C-TiO2 particles can construct S-scheme heterojunction in CNT. During the piezo-photocatalysis, the strain-induced polarization electric field in the heterojunction can regulate the electron migration between the two components, resulting in a more effective CIP degradation. With the synergistic effect of ultrasonic vibration and visible light irradiation, the reaction rate constant of CIP degradation by CNT increases to 0.0517 min-1 , which is 1.86 times that of photocatalysis and 6.46 times that of ultrasound. This system exhibits a stable CIP decomposition efficiency under the interference of various environmental factors. In addition, the in-depth investigation found that three pathways and 12 major intermediates with reduced toxicity are produced after the reaction. Hopefully, the construction of this twisty CNT S-scheme heterojunction with enhanced piezo-photocatalytic effect offers inspiration for the design of environmentally functional materials.
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Affiliation(s)
- Rongdi Tang
- College of Resources & Environment, Hunan Agricultural University, Changsha, Hunan, 410128, P. R. China
| | - Hao Zeng
- College of Resources & Environment, Hunan Agricultural University, Changsha, Hunan, 410128, P. R. China
| | - Chengyang Feng
- KAUST Catalysis Center, Physical Sciences and Engineering Division, King Abdullah University of Science and Technology, Thuwal, 23955-6900, Saudi Arabia
| | - Sheng Xiong
- College of Resources & Environment, Hunan Agricultural University, Changsha, Hunan, 410128, P. R. China
| | - Ling Li
- College of Resources & Environment, Hunan Agricultural University, Changsha, Hunan, 410128, P. R. China
| | - Zhanpeng Zhou
- College of Resources & Environment, Hunan Agricultural University, Changsha, Hunan, 410128, P. R. China
| | - Daoxin Gong
- College of Resources & Environment, Hunan Agricultural University, Changsha, Hunan, 410128, P. R. China
| | - Lin Tang
- College of Environmental Science and Engineering, Hunan University, Changsha, Hunan, 410082, P. R. China
| | - Yaocheng Deng
- College of Resources & Environment, Hunan Agricultural University, Changsha, Hunan, 410128, P. R. China
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16
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Bai X, She M, Ji Y, Zhang Z, Xue W, Liu E, Wan K, Liu P, Zhang S, Li J. Photocatalytic Cascade Reaction Driven by Directed Charge Transfer over V S -Zn 0.5 Cd 0.5 S/GO for Controllable Benzyl Oxidation. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023:e2207250. [PMID: 37127899 PMCID: PMC10369240 DOI: 10.1002/advs.202207250] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Revised: 02/01/2023] [Indexed: 05/03/2023]
Abstract
Photocatalysis is an important technique for synthetic transformations. However, little attention has been paid to light-driven synergistic redox reactions for directed synthesis. Herein, the authors report tunable oxidation of benzyl to phenylcarbinol with the modest yield (47%) in 5 h via singlet oxygen (1 O2 ) and proton-coupled electron transfer (PCET) over the photocatalyst Zn0.5 Cd0.5 S (ZCS)/graphene oxide (GO) under exceptionally mild conditions. Theoretical calculations indicate that the presence of S vacancies on the surface of ZCS/GO photocatalyst is crucial for the adsorption and activation of O2 , successively generating the superoxide radical (• O2 - ) and 1 O2 , attributing to the regulation of local electron density on the surface of ZCS/GO and photogenerated holes (h+ ). Meanwhile, accelerated transfer of photogenerated electrons (e- ) to GO caused by the π-π stacking effect is conducive to the subsequent aldehyde hydrogenation to benzyl alcohol rather than non-selective oxidation of aldehyde to carboxylic acid. Anisotropic charge transport driven by the built-in electric field can further promote the separation of e- and h+ for multistep reactions. Promisingly, one-pot photocatalytic conversion of p-xylene to 4-methylbenzyl alcohol is beneficial for reducing the harmful effects of aromatics on human health. Furthermore, this study provides novel insights into the design of photocatalysts for cascade reactions.
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Affiliation(s)
- Xue Bai
- Chemistry Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, College of Chemistry & Materials Science, Northwest University, Xi'an, 710127, P. R. China
| | - Mengyao She
- Chemistry Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, College of Chemistry & Materials Science, Northwest University, Xi'an, 710127, P. R. China
- Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, Biomedicine Key Laboratory of Shaanxi Province, Lab of Tissue Engineering, the College of Life Sciences, Faculty of Life Science & Medicine, Northwest University, Xi'an, 710069, P. R. China
| | - Yali Ji
- Chemistry Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, College of Chemistry & Materials Science, Northwest University, Xi'an, 710127, P. R. China
| | - Zhe Zhang
- Chemistry Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, College of Chemistry & Materials Science, Northwest University, Xi'an, 710127, P. R. China
| | - Wenhua Xue
- School of Chemical Engineering, Northwest University, Xi'an, 710127, P. R. China
| | - Enzhou Liu
- School of Chemical Engineering, Northwest University, Xi'an, 710127, P. R. China
| | - Kerou Wan
- Key Laboratory of Catalytic Materials and Technology of Shaanxi Province, Kaili Catalyst & New Materials Co., Ltd., Xi'an, 710201, P. R. China
| | - Ping Liu
- Chemistry Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, College of Chemistry & Materials Science, Northwest University, Xi'an, 710127, P. R. China
| | - Shengyong Zhang
- Chemistry Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, College of Chemistry & Materials Science, Northwest University, Xi'an, 710127, P. R. China
| | - Jianli Li
- Chemistry Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, College of Chemistry & Materials Science, Northwest University, Xi'an, 710127, P. R. China
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17
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Liu Z, Shan C, Wei G, Wen J, Jiang L, Hu G, Fang Z, Tang T, Li M. A Novel Non-Metallic Photocatalyst: Phosphorus-Doped Sulfur Quantum Dots. Molecules 2023; 28:molecules28083637. [PMID: 37110871 PMCID: PMC10141183 DOI: 10.3390/molecules28083637] [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: 03/16/2023] [Revised: 04/13/2023] [Accepted: 04/17/2023] [Indexed: 04/29/2023] Open
Abstract
In this paper, a novel phosphorus-doped sulfur quantum dots (P-SQDs) material was prepared using a simple hydrothermal method. P-SQDs have a narrow particle size distribution as well as an excellent electron transfer rate and optical properties. Compositing P-SQDs with graphitic carbon nitride (g-C3N4) can be used for photocatalytic degradation of organic dyes under visible light. More active sites, a narrower band gap, and stronger photocurrent are obtained after introducing P-SQDs into g-C3N4, thus promoting its photocatalytic efficiency by as much as 3.9 times. The excellent photocatalytic activity and reusability of P-SQDs/g-C3N4 are prospective signs of its photocatalytic application under visible light.
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Affiliation(s)
- Ziyi Liu
- College of Science & Key Laboratory of Low-Dimensional Structural Physics and Application, Education Department of Guangxi Zhuang Autonomous Region, Guilin University of Technology, Guilin 541004, China
| | - Chuanfu Shan
- College of Science & Key Laboratory of Low-Dimensional Structural Physics and Application, Education Department of Guangxi Zhuang Autonomous Region, Guilin University of Technology, Guilin 541004, China
| | - Guiyu Wei
- College of Science & Key Laboratory of Low-Dimensional Structural Physics and Application, Education Department of Guangxi Zhuang Autonomous Region, Guilin University of Technology, Guilin 541004, China
| | - Jianfeng Wen
- College of Science & Key Laboratory of Low-Dimensional Structural Physics and Application, Education Department of Guangxi Zhuang Autonomous Region, Guilin University of Technology, Guilin 541004, China
| | - Li Jiang
- College of Science & Key Laboratory of Low-Dimensional Structural Physics and Application, Education Department of Guangxi Zhuang Autonomous Region, Guilin University of Technology, Guilin 541004, China
| | - Guanghui Hu
- College of Science & Key Laboratory of Low-Dimensional Structural Physics and Application, Education Department of Guangxi Zhuang Autonomous Region, Guilin University of Technology, Guilin 541004, China
| | - Zhijie Fang
- School of Electronics Engineering, Guangxi University of Science and Technology, Liuzhou 545006, China
| | - Tao Tang
- College of Science & Key Laboratory of Low-Dimensional Structural Physics and Application, Education Department of Guangxi Zhuang Autonomous Region, Guilin University of Technology, Guilin 541004, China
| | - Ming Li
- College of Science & Key Laboratory of Low-Dimensional Structural Physics and Application, Education Department of Guangxi Zhuang Autonomous Region, Guilin University of Technology, Guilin 541004, China
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18
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Zhang H, Wang C, Li L, Zhang J, Zhao J, Sun T, Cui B. 3D-crumpled graphitic carbon nitride achieving promoted visible-light-driven molecular oxygen activation for phenol degradation. CHEMOSPHERE 2023; 321:138107. [PMID: 36773675 DOI: 10.1016/j.chemosphere.2023.138107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2022] [Revised: 02/03/2023] [Accepted: 02/08/2023] [Indexed: 06/18/2023]
Abstract
Boosting optical absorption and charge transfer of g-C3N4 is of great importance but a challenging task for developing metal-free high-performance photocatalyst. Herein, 3D-crumpled g-C3N4 (DCN) is synthesized through a direct top-down thermal etching strategy. The thermal exfoliation of layered bulk g-C3N4 (BCN) in air atmosphere induces partial distortion of heptazine-based g-C3N4 nanosheet, which further self-assemble into 3D-crumpled network structure. Spectroscopic and photoelectrochemical characterization demonstrate that the unique DCN can not only remarkably extend the visible-light response region to 600 nm by awakening the n-π* electron transition, but also significantly promote O2 activation for selective H2O2 generation owing to the intensified electron delocalization and charge transport ability. Thus, DCN catalyst realizes an excellent photocatalytic phenol degradation rate under visible light irradiation (0.690 h-1), far (4.4-fold) out from the BCN counterparts. This work enables synergistic optimization of optical absorption, charge transport and surface-active sites by constructing a 3D-crumpled structure, which expands the engineering toolbox of metal-free skeleton photocatalyst for developing practical and economical catalysts for environmental remediation.
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Affiliation(s)
- Hui Zhang
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing, 100875, China.
| | - Chengwen Wang
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing, 100875, China
| | - Lei Li
- Beijing Key Laboratory of Water Environmental and Ecological Technology for River Basins, Beijing Water Science and Technology Institute, Beijing, 100048, China
| | - Jiaxin Zhang
- School of Fisheries and Life Science, Dalian Ocean University, Dalian, 116023, China
| | - Jinbo Zhao
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing, 100875, China
| | - Tao Sun
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing, 100875, China
| | - Baoshan Cui
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing, 100875, China
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Chang J, Zhang T, Qiu S, Huang N, Pang D, Li H, Masese T, Zhang H, Li Z, Huang ZD. Oxygenated Triazine-Heptazine Heterostructure Creates an Enormous Ascension to the Visible Light Photocatalytic Hydrogen Evolution Performance of Porous C 3 N 4 Nanosheets. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023:e2301579. [PMID: 36919785 DOI: 10.1002/smll.202301579] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Indexed: 06/18/2023]
Abstract
A highly efficient g-C3 N4 photocatalyst is developed by a novel one-pot thermal polymerization method under a salt fog environment generated by heating the aqueous solution of urea and mixed metal salts of NaCl/KCl, namely SF-CN. Thanks to the synergistic effect of the oxygenation and chemical etching of the salt fog, the obtained SF-CN is an oxygenated ultrathin porous carbon nitride with an intermolecular triazine-heptazine heterostructure, meanwhile, shows enlarged specific surface area, greatly enhanced absorption of visible light, narrowed band gap with a lower conduction band, and an increased photocurrent response due to the effective separation of photogenerated holes and electrons, comparing to those of pristine g-C3 N4 . The theoretical simulations further reveal that the triazine-heptazine heterostructure possesses better photocatalytic hydrogen evolution (PHE) capability than pure triazine and heptazine carbon nitrides. In turn, SF-CN demonstrates an excellent visible light PHE rate of 18.13 mmol h-1 g-1 , up to 259.00 times of that of pristine g-C3 N4 .
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Affiliation(s)
- Jing Chang
- State Key Laboratory for Organic Electronics and Information Displays & Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, Nanjing, 210023, P. R. China
| | - Tong Zhang
- State Key Laboratory for Organic Electronics and Information Displays & Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, Nanjing, 210023, P. R. China
| | - Shengchuang Qiu
- State Key Laboratory for Organic Electronics and Information Displays & Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, Nanjing, 210023, P. R. China
| | - Na Huang
- Institute of Nanochemistry and Nanobiology, School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, P. R. China
| | - Dawei Pang
- State Key Laboratory for Organic Electronics and Information Displays & Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, Nanjing, 210023, P. R. China
| | - Haoran Li
- State Key Laboratory for Organic Electronics and Information Displays & Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, Nanjing, 210023, P. R. China
| | - Titus Masese
- Research Institute of Electrochemical Energy, Department of Energy and Environment (RIECEN), National Institute of Advanced Industrial Science and Technology (AIST), 1-8-31 Midorigaoka, Ikeda, Osaka, 563-8577, Japan
| | - Haijiao Zhang
- Institute of Nanochemistry and Nanobiology, School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, P. R. China
| | - Ziquan Li
- State Key Laboratory for Organic Electronics and Information Displays & Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, Nanjing, 210023, P. R. China
| | - Zhen-Dong Huang
- State Key Laboratory for Organic Electronics and Information Displays & Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, Nanjing, 210023, P. R. China
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20
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Zhang J, Tang K, Fang R, Liu J, Liu M, Ma J, Wang H, Ding M, Wang X, Song Y, Yang D. Nanotechnological strategies to increase the oxygen content of the tumor. Front Pharmacol 2023; 14:1140362. [PMID: 36969866 PMCID: PMC10034070 DOI: 10.3389/fphar.2023.1140362] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2023] [Accepted: 03/01/2023] [Indexed: 03/12/2023] Open
Abstract
Hypoxia is a negative prognostic indicator of solid tumors, which not only changes the survival state of tumors and increases their invasiveness but also remarkably reduces the sensitivity of tumors to treatments such as radiotherapy, chemotherapy and photodynamic therapy. Thus, developing therapeutic strategies to alleviate tumor hypoxia has recently been considered an extremely valuable target in oncology. In this review, nanotechnological strategies to elevate oxygen levels in tumor therapy in recent years are summarized, including (I) improving the hypoxic tumor microenvironment, (II) oxygen delivery to hypoxic tumors, and (III) oxygen generation in hypoxic tumors. Finally, the challenges and prospects of these nanotechnological strategies for alleviating tumor hypoxia are presented.
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Affiliation(s)
- Junjie Zhang
- School of Fundamental Sciences, Bengbu Medical College, Bengbu, China
| | - Kaiyuan Tang
- School of Fundamental Sciences, Bengbu Medical College, Bengbu, China
| | - Runqi Fang
- School of Fundamental Sciences, Bengbu Medical College, Bengbu, China
| | - Jiaming Liu
- School of Fundamental Sciences, Bengbu Medical College, Bengbu, China
| | - Ming Liu
- School of Fundamental Sciences, Bengbu Medical College, Bengbu, China
| | - Jiayi Ma
- School of Fundamental Sciences, Bengbu Medical College, Bengbu, China
| | - Hui Wang
- School of Fundamental Sciences, Bengbu Medical College, Bengbu, China
| | - Meng Ding
- Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, China
- *Correspondence: Meng Ding, ; Xiaoxiao Wang, ; Dongliang Yang,
| | - Xiaoxiao Wang
- Biochemical Engineering Research Center, School of Chemistry and Chemical Engineering, Anhui University of Technology, Ma’anshan, China
- *Correspondence: Meng Ding, ; Xiaoxiao Wang, ; Dongliang Yang,
| | - Yanni Song
- Key Laboratory of Flexible Electronics (KLOFE), Institute of Advanced Materials (IAM), School of Physical and Mathematical Sciences, Nanjing Tech University (NanjingTech), Nanjing, China
| | - Dongliang Yang
- Key Laboratory of Flexible Electronics (KLOFE), Institute of Advanced Materials (IAM), School of Physical and Mathematical Sciences, Nanjing Tech University (NanjingTech), Nanjing, China
- *Correspondence: Meng Ding, ; Xiaoxiao Wang, ; Dongliang Yang,
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21
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Qi Z, Chen J, Zhou W, Li Y, Li X, Zhang S, Fan J, Lv K. Synergistic effects of holey nanosheet and sulfur-doping on the photocatalytic activity of carbon nitride towards NO removal. CHEMOSPHERE 2023; 316:137813. [PMID: 36642138 DOI: 10.1016/j.chemosphere.2023.137813] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2022] [Revised: 12/28/2022] [Accepted: 01/09/2023] [Indexed: 06/17/2023]
Abstract
Photocatalysis provides a sustainable way for NOx elimination. However, efficient and safe photocatalytic removal of NOx remain a great challenge due to the limited light-harvesting ability and quick recombination of charge carriers. Herein, holey sulfur-doped g-C3N4 nanosheets (CNN-S) was reported by directly calcining a mixture of hydrolyzed dicyandiamide and thioacetamide. The specific surface area of the pristine g-C3N4 nanosheets (CNN-S0) is 3-4 times higher than bulk g-C3N4 (BCN), and the photocatalytic NO removal rate also increased from 17% (BCN) to 35% (CNN-S0). The effect of sulfur content on the photocatalytic performance was systematic studied, and CNN-S0.5 sample exhibits the highest NO removal rate (53%). The high photoreactivity of S-doped g-C3N4 nanosheets can be attributed to enhanced visible light absorption, increased specific surface area, and effective separation and transfer of photo-generated charges owing to the synergistic effect of the nanosheet structure and sulfur doping. In addition, density functional theory calculations show that the doping of S is also beneficial to the adsorption and activation of the reactants on CN.
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Affiliation(s)
- Zheng Qi
- Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission & Ministry of Education, College of Resources and Environment, South-Central Minzu University, Wuhan 430074, China
| | - Jinbao Chen
- School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Weichuang Zhou
- Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission & Ministry of Education, College of Resources and Environment, South-Central Minzu University, Wuhan 430074, China
| | - Yuhan Li
- Engineering Research Center for Waste Oil Recovery Technology and Equipment, Ministry of Education, Chongqing Key Laboratory of Catalysis and New Environmental Materials, Chongqing Technology and Business University, Chongqing 400067, China.
| | - Xiaofang Li
- College of Chemistry and Environmental Engineering, Wuhan Polytechnic University, Wuhan 430023, China
| | - Sushu Zhang
- Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission & Ministry of Education, College of Resources and Environment, South-Central Minzu University, Wuhan 430074, China
| | - Jiajie Fan
- School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Kangle Lv
- Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission & Ministry of Education, College of Resources and Environment, South-Central Minzu University, Wuhan 430074, China.
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22
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Sha P, You Y, Wen D, Wu Z, Wang Q, Bu D, Huang S. Two-Dimensional Ultrathin Graphic Carbon Nitrides with Extended π-Conjugation as Extraordinary Efficient Hydrogen Evolution Photocatalyst. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2205834. [PMID: 36403242 DOI: 10.1002/smll.202205834] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Revised: 10/27/2022] [Indexed: 06/16/2023]
Abstract
Construction of 2D graphic carbon nitrides (g-CNx ) with wide visible light adsorption range and high charge separation efficiency concurrently is of great urgent demand and still very challenging for developing highly efficient photocatalysts for hydrogen evolution. To achieve this goal, a two-step pyrolytic strategy has been applied here to create ultrathin 2D g-CNx with extended the π-conjugation. It is experimentally proven that the extension of π-conjugation in g-CNx is not only beneficial to narrowing the bandgap, but also improving the charge separation efficiency of the g-CNx . As an integral result, extraordinary apparent quantum efficiencies (AQEs) of 57.3% and 7.0% at short (380 nm) and long (520 nm) wavelength, respectively, are achieved. The formation process of the extended π-conjugated structures in the ultrathin 2D g-CNx has been investigated using XRD, FT-IR, Raman, XPS, and EPR. Additionally, it has been illustrated that the two-step pyrolytic strategy is critical for creating ultrathin g-CNx nanosheets with extended π-conjugation by control experiments. This work shows a feasible and effective strategy to simultaneously expand the light adsorption range, enhance charge carrier mobility and depress electron-hole recombination of g-CNx for high-efficient photocatalytic hydrogen evolution.
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Affiliation(s)
- Pengzhan Sha
- School of Materials and Energy, Guangzhou Key Laboratory of Low-Dimensional Materials and Energy Storage Devices, Guangdong University of Technology, Guangzhou, 510006, P. R. China
| | - Yang You
- School of Materials and Energy, Guangzhou Key Laboratory of Low-Dimensional Materials and Energy Storage Devices, Guangdong University of Technology, Guangzhou, 510006, P. R. China
| | - Donglian Wen
- School of Materials and Energy, Guangzhou Key Laboratory of Low-Dimensional Materials and Energy Storage Devices, Guangdong University of Technology, Guangzhou, 510006, P. R. China
| | - Zihao Wu
- School of Materials and Energy, Guangzhou Key Laboratory of Low-Dimensional Materials and Energy Storage Devices, Guangdong University of Technology, Guangzhou, 510006, P. R. China
| | - Qingfeng Wang
- School of Materials and Energy, Guangzhou Key Laboratory of Low-Dimensional Materials and Energy Storage Devices, Guangdong University of Technology, Guangzhou, 510006, P. R. China
| | - Donglei Bu
- School of Materials and Energy, Guangzhou Key Laboratory of Low-Dimensional Materials and Energy Storage Devices, Guangdong University of Technology, Guangzhou, 510006, P. R. China
| | - Shaoming Huang
- School of Materials and Energy, Guangzhou Key Laboratory of Low-Dimensional Materials and Energy Storage Devices, Guangdong University of Technology, Guangzhou, 510006, P. R. China
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23
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Zhang C, Bai L, Chen M, Sun X, Zhu M, Wu Q, Gao X, Zhang Q, Zheng X, Yu ZQ, Wu Y. Modulating the Site Density of Mo Single Atoms to Catch Adventitious O Atoms for Efficient H 2 O 2 Oxidation with Light. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2208704. [PMID: 36411951 DOI: 10.1002/adma.202208704] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Revised: 10/29/2022] [Indexed: 06/16/2023]
Abstract
Coordination environment and site density have great impacts on the catalytic performance for single atoms (SAs). Herein, the site density of Mo-SAs on red polymeric carbon nitrides (RPCN) is modulated via a local carbonization strategy to controllably catch adventitious O atoms from open environment. The addition of melamine derivants with hydrocarbyl chains induces local carbonization during RPCN pyrolysis. These local carbonization regions bring abundant graphitic N3C to anchor Mo-SAs, and most of Mo-SAs catch the O atoms in air, forming the O2 -covered Mo-N3 coordination. The dopants of carbon source with different structures and amounts can modulate the site density of Mo-SAs, therefore controlling the amounts of coordinated O atoms. Furthermore, coordinated O atoms around Mo-SAs construct the catalytic environment with Lewis base and gather photo-generated electrons under light. Such O-covered Mo-SAs endow RPCN materials (Mo-RPCN) with a strong ability for hydrogen abstraction, leading to the 99.51% ratio (28.8 mmol min-1 g-1 ) rate for thioanisole conversion with H2 O2 assisted advance oxidation technology. This work brings a new sight on the coordinated atoms dominant oxidation process.
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Affiliation(s)
- Congmin Zhang
- College of Chemistry and Environmental Engineering, Institute of Low-dimensional Materials Genome Initiative, Shenzhen University, Shenzhen, Guangdong, 518071, China
- School of Chemistry and Materials Science, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Lichen Bai
- College of Chemistry and Environmental Engineering, Institute of Low-dimensional Materials Genome Initiative, Shenzhen University, Shenzhen, Guangdong, 518071, China
| | - Min Chen
- School of Chemistry and Materials Science, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Xuejiao Sun
- College of Chemistry and Environmental Engineering, Institute of Low-dimensional Materials Genome Initiative, Shenzhen University, Shenzhen, Guangdong, 518071, China
- School of Chemistry and Materials Science, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Mengzhao Zhu
- School of Chemistry and Materials Science, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Qinglong Wu
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, Synergetic Innovation Center of Quantum Information and quantum Physics, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Xiaoping Gao
- School of Chemistry and Materials Science, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), University of Science and Technology of China, Hefei, Anhui, 230026, China
- College of Materials Science and Engineering, Shenzhen University, Shenzhen, Guangdong, 518071, China
| | - Qun Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, Synergetic Innovation Center of Quantum Information and quantum Physics, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Xusheng Zheng
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui, 230029, China
| | - Zhen-Qiang Yu
- College of Chemistry and Environmental Engineering, Institute of Low-dimensional Materials Genome Initiative, Shenzhen University, Shenzhen, Guangdong, 518071, China
| | - Yuen Wu
- School of Chemistry and Materials Science, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), University of Science and Technology of China, Hefei, Anhui, 230026, China
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24
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Chen M, Guo M, Zhai M, Xu J, Wang L. Manipulating electronic structure and light absorption of carbon nitride via P-doping and local crystallization for efficient photocatalytic reduction of CO2. J CO2 UTIL 2023. [DOI: 10.1016/j.jcou.2023.102392] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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25
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Li K, Zhou W, Li X, Li Q, Carabineiro SAC, Zhang S, Fan J, Lv K. Synergistic effect of cyano defects and CaCO 3 in graphitic carbon nitride nanosheets for efficient visible-light-driven photocatalytic NO removal. JOURNAL OF HAZARDOUS MATERIALS 2023; 442:130040. [PMID: 36182883 DOI: 10.1016/j.jhazmat.2022.130040] [Citation(s) in RCA: 20] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2022] [Revised: 09/16/2022] [Accepted: 09/19/2022] [Indexed: 06/16/2023]
Abstract
Photo-oxidation with semiconductor photocatalysts provides a sustainable and green solution for NOx elimination. Nevertheless, the utilization of traditional photocatalysts in efficient and safe photocatalytic NOx removal is still a challenge due to the slow charge kinetic process and insufficient optical absorption. In this paper, we report a novel porous g-C3N4 nanosheet photocatalyst modified with cyano defects and CaCO3 (xCa-CN). The best performing sample (0.5Ca-CN) exhibits an enhanced photo-oxidation NO removal rate (51.18 %) under visible light irradiation, largely surpassing the value of pristine g-C3N4 nanosheets (34.05 %). Such an enhancement is mainly derived from an extended visible-light response, improved electron excitation and transfer, which are associated with the synergy of cyano defects and CaCO3, as evidenced by a series of spectroscopic analyses. More importantly, in-situ DRIFTS and density functional theory (DFT) results suggest that the introduction of cyano defects and CaCO3 enables control over NO adsorption and activation processes, making it possible to implement a preference pathway (NO → NO+ → NO3¯) and reduce the emission of toxic intermediate NO2. This work demonstrates the potential of integrating defect engineering and insulator modification to design highly efficient g-C3N4-based photocatalysts for air purification.
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Affiliation(s)
- Kaining Li
- College of Chemistry and Environmental Engineering, Wuhan Polytechnic University, Wuhan 430023, PR China; Key Laboratory of Resources Conversion and Pollution Control of the State Ethnic Affairs Commission, College of Resources and Environment, South-Central Minzu University, Wuhan 430074, PR China
| | - Weichuang Zhou
- Key Laboratory of Resources Conversion and Pollution Control of the State Ethnic Affairs Commission, College of Resources and Environment, South-Central Minzu University, Wuhan 430074, PR China
| | - Xiaofang Li
- College of Chemistry and Environmental Engineering, Wuhan Polytechnic University, Wuhan 430023, PR China.
| | - Qin Li
- Key Laboratory of Resources Conversion and Pollution Control of the State Ethnic Affairs Commission, College of Resources and Environment, South-Central Minzu University, Wuhan 430074, PR China
| | - Sónia A C Carabineiro
- LAQV-REQUIMTE, Department of Chemistry, NOVA School of Science and Technology, Universidade NOVA de Lisboa, Caparica 2829-516, Portugal
| | - Sushu Zhang
- Key Laboratory of Resources Conversion and Pollution Control of the State Ethnic Affairs Commission, College of Resources and Environment, South-Central Minzu University, Wuhan 430074, PR China
| | - Jiajie Fan
- School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, PR China
| | - Kangle Lv
- Key Laboratory of Resources Conversion and Pollution Control of the State Ethnic Affairs Commission, College of Resources and Environment, South-Central Minzu University, Wuhan 430074, PR China.
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26
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Tan C, Zhong J, Zheng X, Zhang Q, Chen P, Zhan M, Liu H, Lv W, Liu G. Thin-wall hollow porous cystic-like graphitic carbon nitride with awakened n→π* electronic transitions and exceptional structural features for superior photocatalytic degradation of sulfamethoxazole. CHEMOSPHERE 2023; 310:136686. [PMID: 36202373 DOI: 10.1016/j.chemosphere.2022.136686] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Revised: 09/21/2022] [Accepted: 09/29/2022] [Indexed: 06/16/2023]
Abstract
Effective photoexcitation and carrier migration are the essential aspects to strengthen semiconductor-engaged redox reaction. Herein, a three-dimensional thin-wall hollow porous cystic-like g-C3N4 (HPCN) with curved layer edge was successfully fabricated via a non-template thermal-condensation strategy. The construction of unique distorted structure can evoke the hard-to-activate n→π* electronic transition to some extent, broadening the absorption spectrum to 800 nm. And benefiting from the multiple reflections of incident light, the effective photoactivation can be further achieved. Moreover, the thin-wall porous framework can shorten the diffusion distance and accelerate migration of photogenerated charge, favouring interfacial redox reactions. The optimized HPCN1.0 demonstrated an excellent photocatalytic degradation of SMX under blue-LED light irradiation, which was dramatically superior to that of pristine g-C3N4 (CN, 11.4 times). Ultimately, in consideration of reactions under several influencing factors with four different water samples, we demonstrated that the HPCN photocatalyst could be utilized far more productively for the elimination of SMX under real-world aqueous conditions. This work provides a straightforward approach for the removal of SMX and has immense potential to contribute to global scale environmental remediation.
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Affiliation(s)
- Cuiwen Tan
- School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou, 510006, China
| | - Jiapeng Zhong
- School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou, 510006, China
| | - Xiaoshan Zheng
- School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou, 510006, China
| | - Qianxin Zhang
- School of Environment, Tsinghua University, Beijing, 100084, China
| | - Ping Chen
- School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou, 510006, China
| | - Mingchang Zhan
- School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou, 510006, China
| | - Haijin Liu
- Key Laboratory for Yellow River and Huaihe River Water Environment and Pollution Control, School of Environment, Henan Normal University, Xinxiang, 453007, China
| | - Wenying Lv
- School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou, 510006, China
| | - Guoguang Liu
- School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou, 510006, China.
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27
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Zhai Z, Zhang H, Niu F, Liu P, Zhang J, Lu H. Mesoporous Carbon Nitride with π-Electron-Rich Domains and Polarizable Hydroxyls Fabricated via Solution Thermal Shock for Visible-Light Photocatalysis. ACS NANO 2022; 16:21002-21012. [PMID: 36448781 DOI: 10.1021/acsnano.2c08643] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Carbon nitride semiconductors are competitive candidates for visible-light-responsive photocatalysts, but encounter weakened exciton dissociation arising from the elevated Coulomb force of singlet Frenkel excitons with narrowing bandgaps. We overcome this contradiction by co-infusing π-electron-rich domains and polarizable hydroxyl units into mesoporous carbon nitride, realized by solution thermal shock. The embedded delocalized π-conjugated aromatic domains derived from nonconjugated macromolecules downshift the conduction band edge and contribute to spatial separation of photogenerated electrons in the lowest unoccupied molecular orbital and holes in the highest occupied molecular orbital. Meanwhile, polarizable hydroxyls induce distinct electron flow from heptazine-based skeletons to periphery sites and enhance water adsorption as well as proton reduction capacity. Consequently, the polymeric carbon nitride delivers an enhanced hydrogen evolution rate that is 17.5 times larger than thermally treated counterparts derived from urea fabricated via conventional strategies. These results show that our strategy can infuse different functional motifs into carbon nitride and thus improve photocatalytic activity.
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Affiliation(s)
- Zhimin Zhai
- State Key Laboratory of Molecular Engineering of Polymers, Collaborative Innovation Center of Polymers & Polymer Composites, Department of Macromolecular Science, Fudan University, 2005 Songhu Road, 200438, Shanghai, China
| | - Huihui Zhang
- Department of Chemistry, Fudan University, 2005 Songhu Road, 200438, Shanghai, China
| | - Fushuang Niu
- Department of Chemistry, Fudan University, 2005 Songhu Road, 200438, Shanghai, China
| | - Peiying Liu
- State Key Laboratory of Molecular Engineering of Polymers, Collaborative Innovation Center of Polymers & Polymer Composites, Department of Macromolecular Science, Fudan University, 2005 Songhu Road, 200438, Shanghai, China
| | - Jiajia Zhang
- State Key Laboratory of Molecular Engineering of Polymers, Collaborative Innovation Center of Polymers & Polymer Composites, Department of Macromolecular Science, Fudan University, 2005 Songhu Road, 200438, Shanghai, China
| | - Hongbin Lu
- State Key Laboratory of Molecular Engineering of Polymers, Collaborative Innovation Center of Polymers & Polymer Composites, Department of Macromolecular Science, Fudan University, 2005 Songhu Road, 200438, Shanghai, China
- Yiwu Research Institute of Fudan University, Chengbei Road, 322000Yiwu, Zhejiang, China
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28
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Extended π‑conjugated system of 3D carbon-rich carbon nitride microspheres for boosting photoelectrochemical 4-chlorophenol sensing. Microchem J 2022. [DOI: 10.1016/j.microc.2022.108170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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29
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Wang W, Shu Z, Zhou J, Tang H, Li T, Meng D. Optimizing the Optical Absorption of Poly(heptazine imide) by the n → π* Electron Transition for Improved Photocatalytic H 2 Evolution. ACS APPLIED MATERIALS & INTERFACES 2022; 14:41131-41140. [PMID: 36047678 DOI: 10.1021/acsami.2c12959] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Poly(heptazine imide) (abbreviated as PHI), a heptazine-based crystalline carbon nitride photocatalyst, has attracted widespread attention in the photocatalytic H2 evolution benefiting from its high crystallinity. Nevertheless, the optical absorption range of the directly synthesized PHI is generally narrow, which severely hinders the utilization of visible light. Much research aimed to extend the optical absorption range of PHI; however, either the optimization degree was insufficient or the synthesis process was cumbersome. Herein, red PHI (RPHI) for improving the photocatalytic H2 evolution was facilely synthesized by the one step method. The optimal RPHI sample possesses an obvious new absorption band of the n → π* electron transition and exhibits a significantly enhanced photocatalytic H2 evolution rate of 169 μmol h-1 (λ > 510 nm) and 46 μmol h-1 (λ > 600 nm), which is about 5 times (λ > 510 nm) and 7.7 times (λ > 600 nm) that of pristine PHI and surpasses most reported RPHIs. This work may promote the development of the PHI photocatalyst for near-infrared photocatalytic H2 production.
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Affiliation(s)
- Wenbin Wang
- Engineering Research Center of Nano-Geomaterials of Ministry of Education, Faculty of Materials Science and Chemistry, China University of Geosciences, 388 Lumo Road, Wuhan 430074, China
| | - Zhu Shu
- Engineering Research Center of Nano-Geomaterials of Ministry of Education, Faculty of Materials Science and Chemistry, China University of Geosciences, 388 Lumo Road, Wuhan 430074, China
- Hubei Three Gorges Laboratory, 1 Mazongling Road, Yichang 443007, China
| | - Jun Zhou
- Engineering Research Center of Nano-Geomaterials of Ministry of Education, Faculty of Materials Science and Chemistry, China University of Geosciences, 388 Lumo Road, Wuhan 430074, China
- Hubei Three Gorges Laboratory, 1 Mazongling Road, Yichang 443007, China
| | - Haomiao Tang
- Engineering Research Center of Nano-Geomaterials of Ministry of Education, Faculty of Materials Science and Chemistry, China University of Geosciences, 388 Lumo Road, Wuhan 430074, China
| | - Tiantian Li
- College of Chemistry and Chemical Engineering, Henan Province Key Laboratory of Utilization of Non-metallic Mineral in the South of Henan, Xinyang Normal University, Xinyang 464000, China
| | - Dawei Meng
- Engineering Research Center of Nano-Geomaterials of Ministry of Education, Faculty of Materials Science and Chemistry, China University of Geosciences, 388 Lumo Road, Wuhan 430074, China
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30
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Synergizing n → π* electronic transition and plasmonic hot electron injection enhances carrier generation of S-doped carbon nitride decorated with Au nanoparticles for Cr(VI) degradation. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.121515] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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31
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Recent Advances of Doping and Surface Modifying Carbon Nitride with Characterization Techniques. Catalysts 2022. [DOI: 10.3390/catal12090962] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
As a non-metallic organic semiconductor photocatalyst, graphitic carbon nitride (g–C3N4, CN) has become a research hotspot due to its excellent performance in organic degradation, CO2 reduction and water splitting to produce hydrogen. However, the high recombination rate of electron-hole pairs, low specific surface area and weak light absorption of bulk CN synthesized by the traditional one-step thermal polymerization method seriously restrict its photocatalytic performance and practical application. To enhance the photocatalytic performance of CN, doping and surface modification strategies are usually employed to tune the band gap of carbon nitride and improve the separation of carriers. In this paper, the research progress of different methods to modify CN in recent years is introduced, and the mechanisms of improving the photocatalytic performance are mainly analyzed. Typical modification methods are mainly divided into metal doping, non-metal doping, co-doping and surface-functionalized modification. Some characterization methods that can analyze the doping state and surface modification are also discussed as examples. Finally, the difficulties that need to be addressed through modified CN photocatalysts and the directions for future research are pointed out.
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32
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Meng Y, Sun J, Guo Y, Chen J, Lou Y. Two-dimensional polymerized carbon nitride coupled with (0 0 1)-facets-exposed titanium dioxide S-scheme heterojunction for photocatalytic degradation of norfloxacin. INORG CHEM COMMUN 2022. [DOI: 10.1016/j.inoche.2022.109704] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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33
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Zhu C, Fang Q, Liu R, Dong W, Song S, Shen Y. Insights into the Crucial Role of Electron and Spin Structures in Heteroatom-Doped Covalent Triazine Frameworks for Removing Organic Micropollutants. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2022; 56:6699-6709. [PMID: 35475353 DOI: 10.1021/acs.est.2c01781] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The water shortage crisis, characterized by organic micropollutants (OMPs), urgently requires new materials and methods to deal with it. Although heteroatom doping has been developed into an effective method to modify carbon nanomaterials for various heterogeneous adsorption and catalytic oxidation systems, the active source regulated by intrinsic electron and spin structures is still obscure. Here, a series of nonmetallic element-doped (such as P, S, and Se) covalent triazine frameworks (CTFs) were constructed and applied to remove organic pollutants using the adsorption-photocatalysis process. The external mass transfer model (EMTM) and the homogeneous surface diffusion model (HSDM) were employed to describe the adsorption process. It was found that sulfur-doped CTF (S-CTF-1) showed a 25.6-fold increase in saturated adsorption capacity (554.7 μmol/g) and a 169.0-fold surge in photocatalytic kinetics (5.07 h-1), respectively, compared with the pristine CTF-1. A positive correlation between electron accumulation at the active site (N1 atom) and adsorption energy was further demonstrated with experimental results and theoretical calculations. Meanwhile, the photocatalytic degradation rates were greatly enhanced by forming a built-in electric field driven by spin polarization. In addition, S-CTF-1 still maintained a 98.3% removal of 2,2',4,4'-tetrahydroxybenzophenone (BP-2) micropollutants and 97.6% regeneration after six-cycle sequencing batch treatment in real water matrices. This work established a relation between electron and spin structures for adsorption and photocatalysis, paving a new way to design modified carbon nanomaterials to control OMPs.
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Affiliation(s)
- Chao Zhu
- College of Environment, Zhejiang University of Technology, Hangzhou 310032, P. R. China
| | - Qile Fang
- Advanced Institute of Natural Sciences, Beijing Normal University at Zhuhais, Zhuhai 519087, P. R. China
| | - Renlan Liu
- College of Life and Environmental Science, Wenzhou University, Wenzhou 325035, P. R. China
| | - Wen Dong
- College of Environment, Zhejiang University of Technology, Hangzhou 310032, P. R. China
| | - Shuang Song
- College of Environment, Zhejiang University of Technology, Hangzhou 310032, P. R. China
| | - Yi Shen
- College of Environment, Zhejiang University of Technology, Hangzhou 310032, P. R. China
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34
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Ding L, Wang LJ, Liu RY, Li YF, Sun HZ. Carbon nitride based Schottky junction with a Ni–Mo synergistic interaction for highly efficient photocatalytic hydrogen production. Catal Sci Technol 2022. [DOI: 10.1039/d2cy00792d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A CN/3NiMoP2 Schottky junction with a Ni–Mo synergistic interaction demonstrates a comparable photocatalytic HER performance to CN/3 wt% Pt and satisfactory stability.
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Affiliation(s)
- Lei Ding
- National and Local United Engineering Laboratory for Power Batteries, College of Chemistry, Northeast Normal University, Changchun 130024, China
| | - Li-Jing Wang
- Henan Engineering Center of New Energy Battery Materials, Henan D&A Engineering Center of Advanced Battery Materials, College of Chemistry and Chemical Engineering, Shangqiu Normal University, Shangqiu 476000, China
| | - Ru-Yi Liu
- National and Local United Engineering Laboratory for Power Batteries, College of Chemistry, Northeast Normal University, Changchun 130024, China
| | - Yan-Fei Li
- National and Local United Engineering Laboratory for Power Batteries, College of Chemistry, Northeast Normal University, Changchun 130024, China
| | - Hai-Zhu Sun
- National and Local United Engineering Laboratory for Power Batteries, College of Chemistry, Northeast Normal University, Changchun 130024, China
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