NiSe as an effective co-catalyst coupled with TiO2 for enhanced photocatalytic hydrogen evolution |
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| Affiliation: | 1. New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur P.O., Bangalore 560064, India;2. Department of Chemistry and Industrial Chemistry, Vijayanagara Sri Krishnadevaraya University, Jnanasagara Campus, Cantonment, Bellary 583105, India;3. International Center for Materials Science, Jakkur P.O., Bangalore 560064, India;4. Chemistry & Physics of Materials Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur P.O., Bangalore 560064, India;1. College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou, 310018, China;2. College of Electronic Engineering, Chengdu University of Information Technology, Chengdu, 610225, China;3. College of Management & Technology, Zhejiang Technical Institute of Economics, Hangzhou, 310018, China;4. Department of Electrical and Computer Engineering, University of Waterloo, 200 University Ave West, Waterloo, Canada;5. Microelectronics Research Institute, Hangzhou Dianzi University, Hangzhou, 310018, China;6. College of Physics and Electronic Engineering, Hainan Normal University, Haikou, 571158, China;1. School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an 710119, China;2. Department of Chemistry, Renmin University of China, Beijing 100872, China |
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| Abstract: | Construction of semiconductor heterojunctions can effectively accelerate the separation of photo-induced charge carriers and thereby enhance photocatalytic activity. Here, NiSe was used as an effective co-catalyst to construct an active NiSe/TiO2 heterojunction for improving the photocatalytic H2 production of TiO2. The resultant 10%NiSe/TiO2 heterojunction exhibited 11 times higher photocatalytic H2-production activity than that of bare TiO2. The NiSe/TiO2 heterojunction and the photo-reduction of partial Ni2+ to Ni0 notably accelerated the separation and transfer of photo-excited electron-hole pairs, and thus resulted in obvious improvement of H2-evolution activity. This work holds promise for the application of NiSe in photocatalysis as a high-efficiency photocatalytic cocatalyst. |
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| Keywords: | Photoreduction Heterojunction |
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