期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 44, 期 29, 页码 14550-14560出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2019.04.227
关键词
Carbon nitride; Microtubes; High dispersity; CoSx cocatalyst; Photocatalytic H-2 production
资金
- National Natural Science Foundation of China [21576050, 51602052]
- Jiangsu Provincial Natural Science Foundation of China [BK20150604]
- Fundamental Research Funds for the Central Universities of China [3207045403, 3207045409, 3207046414]
- Foundation of Jiangsu Key Laboratory for Biomass Energy [JSBEM201805]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- Zhongying Young Scholars of Southeast University
Appropriate dispersion of cocatalyst on semiconductor for improving photocatalytic H-2 production efficiency is a challenging work in semiconductor photocatalysis. Herein, we constructed the noble-metal-free CoSx modified tubular sulfur doped carbon nitride (SCN) photocatalysts by chemical precipitation process. The amorphous CoSx well dispersed on SCN served as H-2 production sites, which reduced the overpotential and inhibited the recombination of photogenerated carriers by interfacial charge transfer. Maximized H-2 production rate of 573.06 mu mol g(-1) h(-1) under visible light irradiation was obtained by optimizing the CoSx loading proportion to 2.4%, which was higher than that of 0.75 wt% Pt/SCN. In addition, a possible mechanism for improved H-2 production activity was proposed based on the experiments and discussion. This work provides a new strategy to design rational structure of non-noble metal cocatalyst modified photocatalyst to further improve H-2 production performance. (C) 2019 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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