期刊
PROGRESS IN NATURAL SCIENCE-MATERIALS INTERNATIONAL
卷 28, 期 2, 页码 183-188出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.pnsc.2018.02.006
关键词
Photocatalysis; Carbon nitride; High pressure; Hydrogenation; Visible light
资金
- Major Basic Research Program, Ministry of Science and Technology of China [2014CB239401]
- National Science Fund of China [51422210, 51572266, 51521091]
- Key Research Program of Frontier Sciences CAS [QYZDB-SSW-JSC039]
- Guangxi Key Laboratory of Information Materials [151006-K]
- Newton Advanced Fellowship
Extending visible light absorption range and suppressing the recombination of photogenerated charge carriers are always important topics in developing efficient solar-driven photocatalysts. In this study, the thermal treatment process at 400 degrees C in a high-pressure hydrogen atmosphere was applied to modify graphitic carbon nitride. Compared to the normal atmospheric hydrogen treatment process, this process has the merit of producing nitrogen deficient graphitic carbon nitride in high-yield. The optimal photocatalytic activity of modified graphitic carbon nitride was demonstrated by controlling the treatment duration in the hydrogen atmosphere. The changes in the crystal structure, microstructure and optical properties of carbon nitrides were investigated by several characterizations. The relationship between the photocatalytic activity and structures of graphitic carbon nitride was preliminarily established. The results obtained in this study could provide some new ways of improving the activity of graphitic carbon nitride based photocatalyst.
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