期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 321, 期 -, 页码 183-192出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jhazmat.2016.09.008
关键词
g-C-3 N-4 nanosheets; Bi2MoO6; Photocatalysis; Hydrogen evolution; Disinfection of bacteria
资金
- National Natural Science Foundation of China [21476183, 21306150, 51372201]
- Specialized Research Fund for the Doctoral Program of Higher Education of China [20136101110009]
- Natural Science Foundation of Shaanxi Province, China [2015JM5159]
- Scientific Research Foundation of graduate students of Northwest University [YZZ15003]
Bi2MoO6/g-C3N4 heterojunctions were fabricated by an in situ solvothermal method using g-C3N4 nanosheets. The photocatalytic activities of as-prepared samples were evaluated by hydrogen evolution from water splitting and disinfection of bacteria under visible light irradiation. The results indicate that exfoliating bulk g-C3N4 to g-C3N4 nanosheets greatly enlarges the specific surface area and shortens the diffusion distance for photogenerated charges, which could not only promote the photocatalytic performance but also benefit the sufficient interaction with Bi2MoO6. Furthermore, intimate contact of Bi2MoO6 (BM) and g-C3N4 nanosheets (CNNs) in the BM/CNNs composites facilitates the transfer and separation of photogenetrated electron-hole pairs. 20%-BM/CNNs heterojunction exhibits the optimal photocatalytic hydrogen evolution as well as photocatalytic disinfection of bacteria. Furthermore, h(+) was demonstrated as the dominant reactive species which could make the bacteria cells inactivated in the photocatalytic disinfection process. This study extends new chance of g-C3N4-based photocatalysts to the growing demand of clean new energy and drinking water. (C) 2016 Elsevier B.V. All rights reserved.
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