Montmorillonite-hybridized g-C3N4 composite modified by NiCoP cocatalyst for efficient visible-light-driven photocatalytic hydrogen evolution by dye-sensitization |
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| Affiliation: | 1. Key Laboratory of Eco-Chemical Engineering, Taishan Scholar Advantage and Characteristic Discipline Team of Eco Chemical Process and Technology, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China;2. Key Laboratory of Clay Mineral Applied Research of Gansu Province, Center of Eco-material and Green Chemistry, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, PR China;1. Forschungszentrum Jülich GmbH, IEK-3: Institute of Electrochemical Process Engineering, 52425 Jülich, Germany;2. Chair for Fuel Cells, RWTH Aachen University, 52072 Aachen, Germany;1. College of Chemistry and Chemical Engineering, Research Center of Gansu Military and Civilian Integration Advanced Structural Materials, Northwest Normal University, Lanzhou 730070, China;2. Key Laboratory for Photonic and Electronic Bandgap Materials, Ministry of Education, School of Physics and Electronic Engineering, Harbin Normal University, Harbin 150025, China;1. School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, PR China;2. School of Pharmacy, Jiangsu University, Zhenjiang 212013, PR China;3. Institute for Energy Research, Jiangsu University, Zhenjiang 212013, PR China;1. School of Chemical Engineering/Xi''an Key Laboratory of Special Energy Materials, Northwest University, Xi’ an, 710069, PR China;2. School of Physics, Northwest University, Xi''an, 710069, PR China |
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| Abstract: | The photocatalytic hydrogen evolution performance of g-C3N4 was enhanced via the hybridization with montmorillonite (MMT) and using NiCoP as cocatalyst. The highest hydrogen-evolution rate from water splitting under visible-light irradiation observed over MMT/g-C3N4/15%NiCoP was 12.50 mmol g?1 h?1 under 1.0 mmol L?1 of Eosin Y-sensitization at pH of 11, which was ～26.0 and 1.6 times higher than that of MMT/g-C3N4 (0.48 mmol g?1 h?1) and g-C3N4/15%NiCoP (7.69 mmol g?1 h?1). The apparent quantum yield at 420 nm reached 40.3%. The remarkably improved photocatalytic activity can be ascribed to the increased dispersion of g-C3N4 layers, staggered conduction band potentials between g-C3N4 and NiCoP, as well as the electrostatic repulsion originated from negatively charged MMT. This work demonstrates that MMT can be an outstanding support for the deposition of catalytically active components for photocatalytic hydrogen production. |
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| Keywords: | Montmorillonite NiCoP Photocatalysis |
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