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Jia T, Li J, Deng Z, Yu D, Lee JH. Facile Synthesis of Oxygen-Doped g-C 3N 4 Mesoporous Nanosheets for Significant Enhancement of Photocatalytic Hydrogen Evolution Performance. MATERIALS (BASEL, SWITZERLAND) 2024; 17:3345. [PMID: 38998426 PMCID: PMC11243153 DOI: 10.3390/ma17133345] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2024] [Revised: 03/13/2024] [Accepted: 03/14/2024] [Indexed: 07/14/2024]
Abstract
In this work, oxygen-doped g-C3N4 mesoporous nanosheets (O-CNS) were synthesized via a facile recrystallization method with the assistance of H2O2. The crystal phase, chemical composition, morphological structure, optical property, electronic structure and electrochemical property of the prepared O-CNS samples were well investigated. The morphological observation combined with the nitrogen adsorption-desorption results demonstrated that the prepared O-CNS samples possessed nanosheet-like morphology with a porous structure. Doping O into g-C3N4 resulted in the augmentation of the specific surface area, which could provide more active sites for photocatalytic reactions. Simultaneously, the visible light absorption capacity of O-CNS samples was boosted owing to the regulation of O doping. The built energy level induced by the O doping could accelerate the migration rate of photoinduced carriers, and the porous structure was most likely to speed up the release of hydrogen during the photocatalytic hydrogen process. Resultantly, the photocatalytic hydrogen production rate of the optimized oxygen-doped g-C3N4 nanosheets reached up to 2012.9 μmol·h-1·g-1, which was 13.4 times higher than that of bulk g-C3N4. Thus, the significantly improved photocatalytic behavior was imputed to the synergistic effect of the porous structure, the increase in active sites, and the enhancement of visible light absorption and charge separation efficiency. Our research highlights that the synergistic effect caused by element doping will make a great contribution to the remarkable improvement in photocatalytic activity, providing a new inspiration for the construction of novel catalysts.
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Affiliation(s)
- Tiekun Jia
- School of Materials Science and Engineering & Henan Province International Joint Laboratory of Materials for Solar Energy Conversion and Lithium Sodium Based Battery, Luoyang Institute of Science and Technology, Luoyang 471023, China;
| | - Jingjing Li
- School of Materials Science and Engineering & Henan Province International Joint Laboratory of Materials for Solar Energy Conversion and Lithium Sodium Based Battery, Luoyang Institute of Science and Technology, Luoyang 471023, China;
| | - Zhao Deng
- State Key Lab of Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China;
| | - Dongsheng Yu
- School of Materials Science and Engineering & Henan Province International Joint Laboratory of Materials for Solar Energy Conversion and Lithium Sodium Based Battery, Luoyang Institute of Science and Technology, Luoyang 471023, China;
| | - Joong Hee Lee
- Department of Nano Convergence Engineering, Jeonbuk National University, Jeonju 54896, Republic of Korea;
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Vigneshwaran S, Kim DG, Ko SO. Tuning of interfacial HGO@CLS nanohybrid S-scheme heterojunction with improved carrier separation and photocatalytic activity towards RhB degradation. CHEMOSPHERE 2023; 340:139914. [PMID: 37633616 DOI: 10.1016/j.chemosphere.2023.139914] [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: 07/18/2023] [Revised: 08/14/2023] [Accepted: 08/19/2023] [Indexed: 08/28/2023]
Abstract
Herein, we premeditated and invented the innovative hybrid photocatalyst 2D/2D CuLa2S4 on holey graphene oxide (HGO) (HGO@CLS) via the hydrothermal method. Electrochemical techniques demonstrate the action of HGO in the HGO@CLS photocatalyst as an effective medium for electron transfer. Combining bimetallic sulfides on porous HGO synergistically provides a higher negative conduction band edge (-0.141 V), greater photo response (10.8 mA/cm2), smaller charge transfer resistance (Rct = 1.79Ω), and lower photoluminescence (PL) spectral intensity. According to our research, the catalytic recitals are sped up when HGO is assimilated into CLS photocatalyst hetero-junction. Additionally, it lowers the reassimilation rate due to the combined mesh nanostructures and functionality of CLS and HGO. UV-Vis DRS, Mott-Schottky, PL, and Electrochemical impedance spectra (EIS) results manifested that the CuLa2S4/HGO makes the spatial separation competent and transference of charge carriers due to the photon irradiation and exhibits superior photocatalytic ability. Electron spin resonance (ESR) analysis confirmed that •OH and h+ were the predominant radical species responsible for Rhodamine B(RhB) degradation. Moreover, conceivable degradation ways of RhB were deduced according to the identified intermediates which are responsible for the degradation of recalcitrant products. To check the stability of the photocatalyst, revival tests were also carried out. Similarly, the oxidative byproducts created in the deprivation courses were looked at, and a thorough explanation for the mechanism of degradation was given.
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Affiliation(s)
- Sivakumar Vigneshwaran
- Environmental System Laboratory, Department of Civil Engineering, Kyung Hee University-Global Campus, 1732 Deogyong-daero, Giheung-Gu, Yongin-Si, Gyeonggi-Do 16705, Republic of Korea
| | - Do-Gun Kim
- Department of Environmental Engineering, Sunchon National University, 255 Jungang-ro, Suncheon, Jellanam-do, 57922, Republic of Korea
| | - Seok-Oh Ko
- Environmental System Laboratory, Department of Civil Engineering, Kyung Hee University-Global Campus, 1732 Deogyong-daero, Giheung-Gu, Yongin-Si, Gyeonggi-Do 16705, Republic of Korea.
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Guo Z, Tian Y, Dou G, Wang Y, He J, Song H. CoP decorated 2D/2D red phosphorus/B doped g-C 3N 4 type II heterojunction for boosted pure water splitting activity via the two-electron pathway. Catal Sci Technol 2023. [DOI: 10.1039/d3cy00054k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
Abstract
CoP decorated 2D/2D red phosphorus/B doped g-C3N4 heterojunction enabled photocatalytic pure water splitting to produce H2 with a two-electron process.
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Zhou Y, Qin H, Fang S, Wang Y, Li J, Mele G, Wang C. Photocatalytic hydrogen evolution over Pt–Pd dual atom sites anchored on TiO 2 nanosheets. Catal Sci Technol 2022. [DOI: 10.1039/d2cy01314b] [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
The defective TiO2 nanosheets (Vo-TiO2) supported dual atomic catalyst (Pt–Pd SAs/Vo-TiO2) to product hydrogen.
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Affiliation(s)
- Yaxin Zhou
- School of Chemical Engineering, Northwest University, Xi'an, Shaanxi 710069, China
- International Science & Technology Cooperation Base for Clean Utilization of Hydrocarbon Resources, Chemical Engineering Research Center of the Ministry of Education for Advanced Use Technology of Shanbei Energy, Collaborative Innovation Center for Development of Energy and Chemical Industry in Northern Shaanxi, Northwest University, Xi'an, 710069, China
| | - Hao Qin
- School of Chemical Engineering, Northwest University, Xi'an, Shaanxi 710069, China
- International Science & Technology Cooperation Base for Clean Utilization of Hydrocarbon Resources, Chemical Engineering Research Center of the Ministry of Education for Advanced Use Technology of Shanbei Energy, Collaborative Innovation Center for Development of Energy and Chemical Industry in Northern Shaanxi, Northwest University, Xi'an, 710069, China
| | - Sihan Fang
- School of Chemical Engineering, Northwest University, Xi'an, Shaanxi 710069, China
- International Science & Technology Cooperation Base for Clean Utilization of Hydrocarbon Resources, Chemical Engineering Research Center of the Ministry of Education for Advanced Use Technology of Shanbei Energy, Collaborative Innovation Center for Development of Energy and Chemical Industry in Northern Shaanxi, Northwest University, Xi'an, 710069, China
| | - Yangyang Wang
- School of Chemical Engineering, Northwest University, Xi'an, Shaanxi 710069, China
- International Science & Technology Cooperation Base for Clean Utilization of Hydrocarbon Resources, Chemical Engineering Research Center of the Ministry of Education for Advanced Use Technology of Shanbei Energy, Collaborative Innovation Center for Development of Energy and Chemical Industry in Northern Shaanxi, Northwest University, Xi'an, 710069, China
| | - Jun Li
- School of Chemical Engineering, Northwest University, Xi'an, Shaanxi 710069, China
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, School of Chemistry & Materials Science, Northwest University, Xi'an, Shaanxi 710069, China
| | - Giuseppe Mele
- Department of Engineering for Innovation, University of Salento, Via Arnesano, 73100 Lecce, Italy
| | - Chen Wang
- School of Chemical Engineering, Northwest University, Xi'an, Shaanxi 710069, China
- International Science & Technology Cooperation Base for Clean Utilization of Hydrocarbon Resources, Chemical Engineering Research Center of the Ministry of Education for Advanced Use Technology of Shanbei Energy, Collaborative Innovation Center for Development of Energy and Chemical Industry in Northern Shaanxi, Northwest University, Xi'an, 710069, China
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