Efficient photocatalytic H2 evolution over Cu and Cu3P co-modified TiO2 nanosheet |
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Authors: | Zhongyuan Fu Xinyi Ma Bing Xia Xiaoyun Hu Jun Fan Enzhou Liu |
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Affiliation: | 1. School of Chemical Engineering/Xi''an Key Laboratory of Special Energy Materials, Xi''an 710069, PR China;2. School of Physics, Northwest University, Xi''an 710069, PR China;3. ShaanXi Design & Research Institute of Building, PR China |
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Abstract: | Schottky junction and p-n heterojunction are widely employed to enhance the charge transfer during the photocatalysis process. Herein, Cu and Cu3P co-modified TiO2 nanosheet hybrid (Cu–Cu3P/TiO2) was fabricated using an in situ hydrothermal method. The ternary composite achieved the superior H2 evolution rate of 6915.7 μmol g?1 h?1 under simulated sunlight, which was higher than that of Cu/TiO2 (4643.4 μmol g?1 h?1) and Cu3P/TiO2 (6315.8 μmol g?1 h?1) and pure TiO2 (415.7 μmol g?1 h?1). The enhanced activity can be attributed to the collaboration effect of Schottky junction and p-n heterojunction among Cu/TiO2 and Cu3P/TiO2, which can harvest the visible light, reduce the recombination of charge carriers and lower the overpotential of H2 evolution, leading to a fast H2 evolution kinetics. This work develops a feasible method for the exploration of H2 evolution photocatalyst with outstanding charge separation properties. |
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Keywords: | Cocatalyst Schottky junction p-n heterojunction |
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