Heterostructured boron doped nanodiamonds@g-C3N4 nanocomposites with enhanced photocatalytic capability under visible light irradiation |
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| Affiliation: | 1. School of Physics and Engineering, Zhengzhou University, Zhengzhou 450052, China;2. School of Science, Henan Institute of Engineering, Zhengzhou 451191, China;1. School of Materials Science and Engineering, Northwestern Polytechnical University, Xian, 710072, China;2. Department of Chemistry, University of Okara Punjab, Pakistan;3. State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, 350002, PR China;4. School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou, 510006, PR China;5. Department of Post-Graduate Studies and Research in Chemistry, Gulbarga University, Gulbarga, 585106, India;6. Department of Chemistry, Abdul Wali Khan University, Mardan, Pakistan;7. School of Chemical Engineering, Northwest University, Xi''an, PR China;8. State Key Laboratory of Optoelectronic Materials and Technologies, School of Materials Science and Engineering, Sun Yat-sen University, Guangzhou, 510275, PR China;1. Dalian University of Technology, Dalian 116024, China;2. State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian 116024, China;1. Department of Materials Science and Engineering, Zhejiang Normal University, Jinhua, 321004, China;2. College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua, 321004, China;1. State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou 350002, PR China;2. Department of Environmental Science, Bahauddin Zakariya University, Multan, Pakistan;3. Chemistry Department, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia;1. Ioffe Institute, 194021 Saint-Petersburg, Russia;2. Saint-Petersburg State Institute of Technology, 190013 Saint-Petersburg, Russia;3. Hosei University, 184-8584 Tokyo, Japan |
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| Abstract: | Boron doped nanodiamonds (BDND) were coupled with graphitic carbon nitride (g-C3N4) nanosheets to form a heterojunction via a facile pyrolysis approach. The BDND@g-C3N4 heterojunction exhibits enhanced visible-light absorbance, improved charge generation/separation efficiency and prolonged lifetime of carriers, which lead to the enhanced photocatalytic activities for the hydrogen evolution and organic pollution under visible-light irradiation. The optimal H2 evolution rate and apparent quantum efficiency at 420 nm of the BDND@g-C3N4 heterojunction is 96.3 μmol h−1 and 6.91%, which is about 5 and 2 times higher than those of pristine g-C3N4 nanosheets (18.2 μmol h−1 and 3.92%). No obvious decrease in hydrogen generation rate is observed in the recycling experiment due to the high photo-stabilization of the BDND@g-C3N4 composite. The degradation kinetic rate constant of organic pollution of the BDND@g-C3N4 structure is 0.1075 min−1, which is 3 times higher compared to pristine g-C3N4. This work may provide a promising route to construct highly efficient non-metal photocatalysts for hydrogen evolution and organic pollution degradation under visible light irradiation. |
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| Keywords: | Boron doped nanodiamond Photocatalyst Graphitic carbon nitride Vsible light Hydrogen evolution Heterostructure |
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