期刊
MATERIALS RESEARCH BULLETIN
卷 111, 期 -, 页码 53-60出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.materresbull.2018.10.034
关键词
Bi2S3/ZnIn2S4; Photocatalyst; Photocatalytic activity; Visible light; Charge transportation
资金
- Thailand Research Fund (TRF)
- Office of the Higher Education Commission [MRG6080270]
- Center of Excellence for Innovation in Chemistry (PERCH-CIC), Office of the Higher Education Commission, Ministry of Education (OHEC), Thailand
This study successfully synthesized Bi2S3/ZnIn2S4 composites with different weight percentages of Bi2S3 by cyclic microwave irradiation followed by wet impregnation. The photocatalytic activities of the Bi2S3/ZnIn2S4 composites were evaluated by the photodegradation of methylene blue in an aqueous solution. It was found that the 12.5%wt-Bi2S3/ZnIn2S4 photocatalyst exhibited the highest decolorization efficiency (95.4% within 300 min) with good stability against photocorrosion and good recyclability for photocatalytic reaction. Based on the results from UV-vis DRS, PL, photocurrent response measurement, and the active species trapping experiments, the enhanced photocatalytic activity of the Bi2S3/ZnIn2S4 photocatalyst was due to the increased ability to absorb visible light, and the enhanced charge separation and transportation between Bi2S3 and ZnIn2S4 through the Z-scheme mechanism. A direct Z-scheme charge transfer pathway for photocatalytic reaction over the Bi2S3/ZnIn2S4 photocatalyst was also proposed and discussed.
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