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Tang R, Wang H, Dong X, Zhang L, Sun Y, Dong F. Selectivity regulation of CO 2 photoreduction via the electron configuration of active sites on single-atom photocatalysts. J Colloid Interface Sci 2024; 655:243-252. [PMID: 37944372 DOI: 10.1016/j.jcis.2023.10.154] [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: 07/30/2023] [Revised: 10/23/2023] [Accepted: 10/29/2023] [Indexed: 11/12/2023]
Abstract
The major challenge in the photocatalytic reduction of CO2 is to achieve high conversion efficiency while maintaining selectivity for a single product. Photocatalysts containing single-metal Cu2+ with 3d9 and Zn2+ with 3d10 on g-C3N4 were prepared using a high-energy ball mill. Single-atom Zn inner electron configuration is stable (3d10) and the peripheral empty orbitals act as electron traps to trap photo-generated electrons and improve the efficiency of charge separation; Zn is an active site to enhance the adsorption and activation of CO2. The stable electron configuration can reduce the energy required for the overall reaction and increase the activity while changing the reaction pathway to form CO. As a result, the 0.5 mol% Zn/g-C3N4 (Zn-CN-0.5) photocatalyst achieves ∼100 % selectivity for the photocatalytic reduction of CO2 to CO at a rate of ∼21.1 μmol·g-1·h-1. In contrast, the 0.5 mol% Cu/g-C3N4 (Cu-CN-0.5) photocatalyst with an unstable electronic structure does not exhibit high selectivity.
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Affiliation(s)
- Ruofei Tang
- Yangtze Delta Region Institute (Huzhou) & Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Huzhou 313000, China; Sichuan Provincial Engineering Research Center of Functional Development and Application of High Performance Special Textile Materials, Chengdu Textile College, Chengdu, 611731, China
| | - Hong Wang
- Yangtze Delta Region Institute (Huzhou) & Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Huzhou 313000, China
| | - Xing'an Dong
- Yangtze Delta Region Institute (Huzhou) & Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Huzhou 313000, China
| | - Lili Zhang
- Institute of Sustainability for Chemicals, Energy and Environment (ISCE(2)), Agency for Science, Technology and Research (A*STAR), 1 Pesek Road, Jurong Island 627833, Singapore
| | - Yanjuan Sun
- Yangtze Delta Region Institute (Huzhou) & Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Huzhou 313000, China
| | - Fan Dong
- Yangtze Delta Region Institute (Huzhou) & Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Huzhou 313000, China.
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2
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Chen L, Liu X, Wang D, Xia Y, Yan G, Huang X, Wang X. Plasmon Au/K-doped defective graphitic carbon nitride for enhanced hydrogen production. Dalton Trans 2023; 52:2845-2852. [PMID: 36756969 DOI: 10.1039/d2dt03925g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Knowledge of the photocatalytic H2-evolution mechanism is of critical importance for water splitting, and for designing active catalysts for a sustainable energy supply. In this study, we prepared plasmon Au-modified K-doped defective graphitic carbon nitride (Au/KCNx) and then applied it in photocatalytic hydrogen-production tests. The hydrogen-production rate of the Au/KCNx photocatalyst (8.85 mmol g-1 h-1) was found to be almost 104 times higher than that of Au/g-C3N4 (0.085 mmol g-1 h-1), together with an apparent quantum efficiency of 12.8% at 420 nm. It could significantly improve the photocatalytic activities of the Au/KCNx sample, which was attributed to the synergistic effects of the plasmon effect, potassium doping, and nitrogen vacancy. In addition, the Au/KCNx photocatalyst had a large surface area, which was beneficial for photogenerated carrier separation and transfer. The novel strategy proposed here is a potential new method for the development of graphitic carbon nitride photocatalysts with obviously enhanced activities.
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Affiliation(s)
- Lu Chen
- Department of Chemistry, Fujian Province University Key Laboratory of Green Energy and Environment Catalysis, Ningde Normal University, Ningde 352100, PR China
| | - Xiyao Liu
- Department of Chemistry, Fujian Province University Key Laboratory of Green Energy and Environment Catalysis, Ningde Normal University, Ningde 352100, PR China
| | - Deling Wang
- Department of Chemistry, Fujian Province University Key Laboratory of Green Energy and Environment Catalysis, Ningde Normal University, Ningde 352100, PR China
| | - Yuzhou Xia
- Department of Chemistry, Fujian Province University Key Laboratory of Green Energy and Environment Catalysis, Ningde Normal University, Ningde 352100, PR China
| | - Guiyang Yan
- Department of Chemistry, Fujian Province University Key Laboratory of Green Energy and Environment Catalysis, Ningde Normal University, Ningde 352100, PR China
| | - Xueyan Huang
- School of Automobile, Fujian Chuanzheng Communications College, Fuzhou, 350002, PR China
| | - Xuxu Wang
- State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, Fuzhou 350002, PR China
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3
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Wang M, Xu S, Ge Z, Li Y, Zhou Z, Chen Y. All-Solid-State C 3N 4/Ni xP/Red Phosphorus Z-Scheme Heterostructure for Wide-Spectrum Photocatalytic Pure Water Splitting. Ind Eng Chem Res 2023. [DOI: 10.1021/acs.iecr.2c03297] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Menglong Wang
- International Research Center for Renewable Energy, State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an710049, P. R. China
| | - Shuai Xu
- Department of Chemical Engineering, School of Water and Environment, Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, Chang’an University, Xi’an710064, P. R. China
| | - Zhichao Ge
- International Research Center for Renewable Energy, State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an710049, P. R. China
| | - Yuliang Li
- Department of Chemical Engineering, School of Water and Environment, Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, Chang’an University, Xi’an710064, P. R. China
| | - Zhaohui Zhou
- Department of Chemical Engineering, School of Water and Environment, Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, Chang’an University, Xi’an710064, P. R. China
| | - Yubin Chen
- International Research Center for Renewable Energy, State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an710049, P. R. China
- Integrated Energy Institute, Sichuan Digital Economy Industry Development Research Institute, Jinniu District, Chengdu610036, P. R. China
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4
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Tang R, Wang H, Dong X, Zhang S, Zhang L, Dong F. A ball milling method for highly dispersed Ni atoms on g-C3N4 to boost CO2 photoreduction. J Colloid Interface Sci 2023; 630:290-300. [DOI: 10.1016/j.jcis.2022.10.110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2022] [Revised: 10/20/2022] [Accepted: 10/21/2022] [Indexed: 11/06/2022]
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5
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Underlying Mechanisms of Reductive Amination on Pd-Catalysts: The Unique Role of Hydroxyl Group in Generating Sterically Hindered Amine. Int J Mol Sci 2022; 23:ijms23147621. [PMID: 35886969 PMCID: PMC9320161 DOI: 10.3390/ijms23147621] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2022] [Revised: 07/04/2022] [Accepted: 07/08/2022] [Indexed: 12/27/2022] Open
Abstract
Pd nanospecies supported on porous g-C3N4 nanosheets were prepared for efficient reductive amination reactions. The structures of the catalysts were characterized via FTIR, XRD, XPS, SEM, TEM, and TG analysis, and the mechanisms were investigated using in situ ATR−FTIR spectroscopic analysis complemented by theoretical calculation. It transpired that the valence state of the Pd is not the dominating factor; rather, the hydroxyl group of the Pd(OH)2 cluster is crucial. Thus, by passing protons between different molecules, the hydroxyl group facilitates both the generation of the imine intermediate and the reduction of the C=N unit. As a result, the sterically hindered amines can be obtained at high selectivity (>90%) at room temperature.
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Qasim M, Liu M, Guo L. Z-scheme P-doped-g-C3N4/Fe2P/red-P ternary composite enables efficient two-electron photocatalytic pure water splitting. Catal Today 2022. [DOI: 10.1016/j.cattod.2022.05.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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7
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Li X, Li N, Gao Y, Ge L. Design and applications of hollow-structured nanomaterials for photocatalytic H2 evolution and CO2 reduction. CHINESE JOURNAL OF CATALYSIS 2022. [DOI: 10.1016/s1872-2067(21)63863-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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8
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A Facile One Step Synthesis of MoS2/g-C3N4 Photocatalyst with Enhanced Visible Light Photocatalytic Hydrogen Production. Catal Letters 2021. [DOI: 10.1007/s10562-021-03689-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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9
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Surface assembly of cobalt species for simultaneous acceleration of interfacial charge separation and catalytic reactions on Cd0.9Zn0.1S photocatalyst. CHINESE JOURNAL OF CATALYSIS 2021. [DOI: 10.1016/s1872-2067(20)63717-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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10
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Liu X, Yang Z, Zhang L. In-situ fabrication of 3D hierarchical flower-like β-Bi 2O 3@CoO Z-scheme heterojunction for visible-driven simultaneous degradation of multi-pollutants. JOURNAL OF HAZARDOUS MATERIALS 2021; 403:123566. [PMID: 32781277 DOI: 10.1016/j.jhazmat.2020.123566] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Revised: 07/20/2020] [Accepted: 07/21/2020] [Indexed: 06/11/2023]
Abstract
Development of an efficient heterojunction catalyst with a superior visible-light driven activity is regarded as a promising strategy to decontaminate organic wastewater. Herein, a novel direct Z-scheme β-Bi2O3@CoO heterojunction was well designed and successfully fabricated by in situ incorporating the two energy band-matched semiconductors. The obtained β-Bi2O3@CoO hybrid presented a unique 3D hierarchical structure with a mass of open channels and mesoporous, which afforded not only rapid mass transfer of targets but also good light-harvesting in view of the multiple reflections. Compared to the pristine β-Bi2O3 and CoO, the β-Bi2O3@CoO hybrid exhibited remarkably improved photocatalytic activity towards the simultaneous degradation of chlorotetracycline (CTC), tetracycline hydrochloride (TCH), oxytetracycline (OTC) and nitrobenzene (NB) under visible-light irradiation. The possible intermediates and degradation pathways were also tracked by mass spectra (MS) analysis. Moreover, a direct Z-scheme charge transfer mechanism in the intimate contact interface between β-Bi2O3 and CoO was verified for the improved catalytic activity, endowing the effective separation/transportation of the photo-excited charge carriers and maintenance of the strong redox ability in β-Bi2O3@CoO heterojunction. The present work affords a simple approach to design and construct 3D hierarchical direct Z-scheme photocatalysts with promising applications in water environment remediation.
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Affiliation(s)
- Xueyan Liu
- College of Chemistry, Liaoning University, Shenyang, 110036, China
| | - Zhen Yang
- College of Chemistry, Liaoning University, Shenyang, 110036, China
| | - Lei Zhang
- College of Chemistry, Liaoning University, Shenyang, 110036, China.
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11
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Yan F, Wu Y, Jiang L, Xue X, Lv J, Lin L, Yu Y, Zhang J, Yang F, Qiu Y. Design of C 3 N 4 -Based Hybrid Heterojunctions for Enhanced Photocatalytic Hydrogen Production Activity. CHEMSUSCHEM 2020; 13:876-881. [PMID: 31944616 DOI: 10.1002/cssc.201903437] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Revised: 01/09/2020] [Indexed: 06/10/2023]
Abstract
Semiconductors and metals can form an Ohmic contact with an electric field pointing to the metal, or a Schottky contact with an electric field pointing to the semiconductor. If these two types of heterojunctions are constructed on a single nanoparticle, the two electric fields may cause a synergistic effect and increase the separation rate of the photogenerated electrons and holes. Metal Ni and Ag nanoparticles were successively loaded on the graphitic carbon nitride (g-C3 N4 ) surface by precipitation and photoreduction in the hope of forming hybrid heterojunctions on single nanoparticles. TEM/high-resolution TEM images showed that Ag and Ni were loaded on different locations on C3 N4 , which indicated that during the photoreduction reaction Ag+ obtained electrons from C3 N4 in the reduction reaction, whereas oxidation reactions proceeded on Ni nanoparticles. Photocatalytic hydrogen production experiments showed that C3 N4 -based hybrid heterojunctions can greatly improve the photocatalytic activity of materials. The possible reason is that two heterojunctions could form a long-range electric field similar to the p-i-n structure in semiconductors. Most of the photogenerated carriers were generated and then separated in this electric field, thereby increasing the separation rate of electrons and holes. This further improved the photocatalytic activity of C3 N4 .
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Affiliation(s)
- Fengpo Yan
- Key Laboratory of Green Perovskites Application of Fujian Province Universities, Fujian Jiangxia University, Fuzhou, 350108, P.R. China
| | - Yonghua Wu
- Key Laboratory of Green Perovskites Application of Fujian Province Universities, Fujian Jiangxia University, Fuzhou, 350108, P.R. China
| | - Linqin Jiang
- Key Laboratory of Green Perovskites Application of Fujian Province Universities, Fujian Jiangxia University, Fuzhou, 350108, P.R. China
| | - Xiaogang Xue
- School of Materials Science and Engineering, Guangxi Key Laboratory of Information Materials, Guilin University of Electronic Technology, Guilin, 541004, P.R. China
| | - Jiangquan Lv
- Key Laboratory of Green Perovskites Application of Fujian Province Universities, Fujian Jiangxia University, Fuzhou, 350108, P.R. China
| | - Lingyan Lin
- Key Laboratory of Green Perovskites Application of Fujian Province Universities, Fujian Jiangxia University, Fuzhou, 350108, P.R. China
| | - Yunlong Yu
- Key Laboratory of Green Perovskites Application of Fujian Province Universities, Fujian Jiangxia University, Fuzhou, 350108, P.R. China
| | - Jiye Zhang
- School of Materials Science and Engineering, Shanghai University, 99 Shangda Road, Shanghai, 200444, P.R. China
| | - Fugui Yang
- Mathematical Institution, Fujian Jiangxia University, Fuzhou, 350108, P.R. China
| | - Yu Qiu
- Key Laboratory of Green Perovskites Application of Fujian Province Universities, Fujian Jiangxia University, Fuzhou, 350108, P.R. China
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12
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Zhang L, Zhang J, Xia Y, Xun M, Chen H, Liu X, Yin X. Metal-Free Carbon Quantum Dots Implant Graphitic Carbon Nitride: Enhanced Photocatalytic Dye Wastewater Purification with Simultaneous Hydrogen Production. Int J Mol Sci 2020; 21:ijms21031052. [PMID: 32033369 PMCID: PMC7036787 DOI: 10.3390/ijms21031052] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2019] [Revised: 01/23/2020] [Accepted: 02/01/2020] [Indexed: 12/05/2022] Open
Abstract
The use of photocatalysts to purify wastewater and simultaneously convert solar energy into clean hydrogen energy is of considerable significance in environmental science. However, it is still a challenge due to their relatively high costs, low efficiencies, and poor stabilities. In this study, a metal-free carbon quantum dots (CQDs) modified graphitic carbon nitride photocatalyst (CCN) was synthesized by a facile method. The characterization and theoretical calculation results reveal that the incorporation of CQDs into the g-C3N4 matrix significantly improves the charge transfer and separation efficiency, exhibits a redshift of absorption edge, narrows the bandgap, and prevents the recombination of photoexcited carriers. The hydrogen production and simultaneous degradation of methylene blue (MB) or rhodamine B (RhB) in simulated wastewaters were further tested. In the simulated wastewater, the CCN catalyst showed enhanced photodegradation efficiency, accompanied with the increased hydrogen evolution rate (1291 µmol·h−1·g−1). The internal electrical field between the g-C3N4 and the CQDs is the main reason for the spatial separation of photoexcited electron-hole pairs. Overall, this work could offer a new protocol for the design of highly efficient photocatalysts for dye wastewater purification with simultaneous hydrogen production.
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Affiliation(s)
- Lilei Zhang
- College of Chemistry and Chemical Engineering, Luoyang Normal University, Luoyang 471934, China;
| | - Jingxiao Zhang
- College of Chemistry and Chemical Engineering, Luoyang Normal University, Luoyang 471934, China;
- College of Food and Drug, Luoyang Normal University, Luoyang 471934, China
- Correspondence:
| | - Yuanyu Xia
- College of Food and Drug, Luoyang Normal University, Luoyang 471934, China
| | - Menghan Xun
- College of Food and Drug, Luoyang Normal University, Luoyang 471934, China
| | - Hong Chen
- College of Food and Drug, Luoyang Normal University, Luoyang 471934, China
| | - Xianghui Liu
- College of Food and Drug, Luoyang Normal University, Luoyang 471934, China
| | - Xia Yin
- School of Chemical Engineering and Pharmacy, Wuhan Institute of Technology, Wuhan 430205, China
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13
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Enhanced photocatalytic hydrogen production over Co3O4@g-C3N4 p-n junction adhering on one-dimensional carbon fiber. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2019.124200] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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14
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Zhu A, Qiao L, Tan P, Pan J. Interfaces of graphitic carbon nitride-based composite photocatalysts. Inorg Chem Front 2020. [DOI: 10.1039/d0qi01026j] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
This review concentrates on the interface issues of g-C3N4-based photocatalysts, including methods for constructing interfaces, techniques for identifying interfaces, and the types and roles of the as-developed interfaces.
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Affiliation(s)
- Anquan Zhu
- State Key Laboratory for Powder Metallurgy
- Central South University
- Changsha 410083
- P. R. China
| | - Lulu Qiao
- State Key Laboratory for Powder Metallurgy
- Central South University
- Changsha 410083
- P. R. China
| | - Pengfei Tan
- State Key Laboratory for Powder Metallurgy
- Central South University
- Changsha 410083
- P. R. China
| | - Jun Pan
- State Key Laboratory for Powder Metallurgy
- Central South University
- Changsha 410083
- P. R. China
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15
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Zhu M, Zhu C, Wu D, Wang X, Wang H, Gao J, Huang H, Shi C, Liu Y, Kang Z. Efficient photocatalytic water splitting through titanium silicalite stabilized CoO nanodots. NANOSCALE 2019; 11:15984-15990. [PMID: 31424466 DOI: 10.1039/c9nr05057d] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Water can be split into hydrogen (H2) and hydrogen peroxide (H2O2) in an environment-friendly manner through photocatalysis by CoO, which is a promising strategy to alleviate the energy crisis. However, the stability of CoO remains a great challenge because of the oxidation effect of the product H2O2. Herein, titanium silicalite-1 (TS-1) was employed as a framework to obtain and anchor monodisperse CoO nanodots, improve CoO photocatalytic performance, and efficiently separate the oxidizing species from CoO by adsorbing the resulting H2O2. As a result, TS-1 prevented CoO from aggregation, surface oxidation, and rapid inactivation. CoO-TS-1 showed H2 and H2O2 production rates of 1460 μmol h-1 gCoO-1 and 1390 μmol h-1 gCoO-1, respectively, with a high photostability for about 168 h. In addition, the efficiently harvested H2O2 was directly used in the oxidation of cyclohexane to cyclohexanol and cyclohexanone with a selectivity of up to 89.48%. This work paves a new way for the design of an efficient and stable photocatalyst as well as product utilization.
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Affiliation(s)
- Mengmeng Zhu
- Institute of Functional Nano and Soft Materials Laboratory (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, 199 Ren'ai Road, Suzhou, 215123, Jiangsu, PR China.
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16
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Liu X, Zhang Q, Liang L, Chen L, Wang Y, Tan X, Wen L, Huang H. In situ growing of CoO nanoparticles on g-C 3N 4 composites with highly improved photocatalytic activity for hydrogen evolution. ROYAL SOCIETY OPEN SCIENCE 2019; 6:190433. [PMID: 31417741 PMCID: PMC6689614 DOI: 10.1098/rsos.190433] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/13/2019] [Accepted: 06/11/2019] [Indexed: 06/10/2023]
Abstract
CoO/g-C3N4 hybrid catalyst is facilely prepared for application to photocatalytic H2 evolution from water splitting by the vacuum rotation-evaporation and in situ thermal method. The physical and chemical properties of CoO/g-C3N4 are determined by a series of characterization methods. The g-C3N4 with 0.6 wt% Co loading exhibits superior photocatalytic hydrogen evolution activity with an H2 evolution amount of 23.25 mmol g-1 after 5 h. The obtained 0.6 wt% CoO/g-C3N4 can split water to generate 0.39 mmol g-1 H2 without sacrificial agent and noble metal, while the pure g-C3N4 is inactive under the same reaction conditions. The remarkable enhancement of photocatalytic H2 evolution activity of CoO/g-C3N4 composites is mainly ascribed to the effective separation of electron-hole pairs and charge transfer. The work creates new opportunities for the design of low-cost g-C3N4-based photocatalysts with high photocatalytic H2 evolution activity from overall water splitting.
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Affiliation(s)
- Xuecheng Liu
- Engineering Research Center for Waste Oil Recovery Technology and Equipment, Chongqing Key Laboratory of Catalysis and New Environmental Materials, College of Environment and Resources, Chongqing Technology and Business University, Chongqing 400067, People's Republic of China
- Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, People's Republic of China
| | - Qian Zhang
- Engineering Research Center for Waste Oil Recovery Technology and Equipment, Chongqing Key Laboratory of Catalysis and New Environmental Materials, College of Environment and Resources, Chongqing Technology and Business University, Chongqing 400067, People's Republic of China
| | - Liwei Liang
- Engineering Research Center for Waste Oil Recovery Technology and Equipment, Chongqing Key Laboratory of Catalysis and New Environmental Materials, College of Environment and Resources, Chongqing Technology and Business University, Chongqing 400067, People's Republic of China
| | - Lintao Chen
- Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, People's Republic of China
| | - Yuyou Wang
- Engineering Research Center for Waste Oil Recovery Technology and Equipment, Chongqing Key Laboratory of Catalysis and New Environmental Materials, College of Environment and Resources, Chongqing Technology and Business University, Chongqing 400067, People's Republic of China
| | - Xiaoqing Tan
- Engineering Research Center for Waste Oil Recovery Technology and Equipment, Chongqing Key Laboratory of Catalysis and New Environmental Materials, College of Environment and Resources, Chongqing Technology and Business University, Chongqing 400067, People's Republic of China
| | - Li Wen
- Engineering Research Center for Waste Oil Recovery Technology and Equipment, Chongqing Key Laboratory of Catalysis and New Environmental Materials, College of Environment and Resources, Chongqing Technology and Business University, Chongqing 400067, People's Republic of China
| | - Hongyu Huang
- Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, People's Republic of China
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17
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Kinetic study of Z-scheme C3N4/CuWO4 photocatalyst towards solar light inactivation of mixed populated bacteria. J Photochem Photobiol A Chem 2019. [DOI: 10.1016/j.jphotochem.2018.08.035] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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18
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Niu J, Xie Y, Luo H, Wang Q, Zhang Y, Wang Y. Cobalt oxide loaded graphitic carbon nitride as adsorptive photocatalyst for tetracycline removal from aqueous solution. CHEMOSPHERE 2019; 218:169-178. [PMID: 30471497 DOI: 10.1016/j.chemosphere.2018.11.111] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Revised: 11/15/2018] [Accepted: 11/16/2018] [Indexed: 06/09/2023]
Abstract
The treatment of antibiotic-containing wastewater is of great importance due to the potential threats of antibiotics to human and the ecosystem. We reported the preparation of cobalt oxide loaded graphitic carbon nitride (CoO/g-C3N4) by an impregnation-calcination method for tetracycline (TC) removal from aqueous solution. The developed CoO/g-C3N4 exhibited high adsorption capacity and fast adsorption kinetic for TC due to the complexation of TC with surface loaded CoO. In particular, 7%CoO/gC3N43 sample presented a maximum TC adsorption capacity of 391.4 mg g-1. It was found that Langmuir and pseudo-second order kinetic models fitted TC adsorption process well. Further photocatalytic studies showed that CoO loaded g-C3N4 was active for TC photodegradation, although the photocatalytic reaction rate constant was lower than that of native g-C3N4. CoO nanoparticles loading on g-C3N4 played the major role of adsorption sites rather than cocatalyst for photocatalysis. We believe that the developed CoO/g-C3N4 could be a potential adsorptive photocatalyst for antibiotic pollutants removal from wastewater.
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Affiliation(s)
- Jinye Niu
- School of Chemical Engineering, Sichuan University, Chengdu, 610065, China
| | - Yi Xie
- School of Chemical Engineering, Sichuan University, Chengdu, 610065, China
| | - Haiqiong Luo
- School of Chemical Engineering, Sichuan University, Chengdu, 610065, China
| | - Qian Wang
- School of Chemical Engineering, Sichuan University, Chengdu, 610065, China
| | - Yongkui Zhang
- School of Chemical Engineering, Sichuan University, Chengdu, 610065, China
| | - Yabo Wang
- School of Chemical Engineering, Sichuan University, Chengdu, 610065, China.
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19
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Cui L, Fang Z, Liu Y, Chen M, Yin C, Wang J, Wang Z, Dong M, Kang S, Liu P. Moderate NaNO2 etching enables easy crystallinity optimization of g-C3N4 with superior photoreduction performance. Inorg Chem Front 2019. [DOI: 10.1039/c9qi00113a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An economical and general method to fabricate g-C3N4 with high crystallinity and excellent photocatalytic properties is developed, in which cheap sodium nitrite aqueous solution is utilized as a moderate etching agent.
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Affiliation(s)
- Lifeng Cui
- Department of Environmental Science and Engineering
- University of Shanghai for Science and Technology
- Shanghai
- P.R. China
| | - Zirou Fang
- Department of Environmental Science and Engineering
- University of Shanghai for Science and Technology
- Shanghai
- P.R. China
| | - Yanfei Liu
- Department of Environmental Science and Engineering
- University of Shanghai for Science and Technology
- Shanghai
- P.R. China
| | - Mengya Chen
- Department of Environmental Science and Engineering
- University of Shanghai for Science and Technology
- Shanghai
- P.R. China
| | - Chaochuang Yin
- Department of Environmental Science and Engineering
- University of Shanghai for Science and Technology
- Shanghai
- P.R. China
| | - Junjie Wang
- Department of Environmental Science and Engineering
- University of Shanghai for Science and Technology
- Shanghai
- P.R. China
| | - Zegao Wang
- Interdisciplinary Nanoscience Center (iNANO)
- Aarhus University
- Aarhus C
- Denmark
- College of Materials Science and Engineering
| | - Mingdong Dong
- Interdisciplinary Nanoscience Center (iNANO)
- Aarhus University
- Aarhus C
- Denmark
| | - Shifei Kang
- Department of Environmental Science and Engineering
- University of Shanghai for Science and Technology
- Shanghai
- P.R. China
- Interdisciplinary Nanoscience Center (iNANO)
| | - Ping Liu
- Department of Materials Science & Engineering
- University of Shanghai for Science and Technology
- Shanghai
- P.R. China
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20
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Wang N, Li X. Protonated carbon nitride nanosheet supported IrO2 quantum dots for pure water splitting without sacrificial reagents. Inorg Chem Front 2018. [DOI: 10.1039/c8qi00419f] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel photocatalyst with IrO2 quantum dots anchored on g-C3N4 exhibits enhanced visible-light-driven overall water splitting.
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Affiliation(s)
- Nan Wang
- Guangzhou Institute of Energy Conversion
- Chinese Academy of Sciences
- Guangzhou 510640
- P.R. China
- CAS Key Laboratory of Renewable Energy
| | - Xinjun Li
- Guangzhou Institute of Energy Conversion
- Chinese Academy of Sciences
- Guangzhou 510640
- P.R. China
- CAS Key Laboratory of Renewable Energy
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21
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Fu Y, Liu C, Zhu C, Wang H, Dou Y, Shi W, Shao M, Huang H, Liu Y, Kang Z. High-performance NiO/g-C3N4 composites for visible-light-driven photocatalytic overall water splitting. Inorg Chem Front 2018. [DOI: 10.1039/c8qi00292d] [Citation(s) in RCA: 67] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
NiO/g-C3N4 as a photocatalyst achieves efficient visible-light-driven overall water splitting without a sacrificial agent.
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