Ag2S and MoS2 as dual, co-catalysts for enhanced photocatalytic degradation of organic pollutions over CdS
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- 作者：Ying Wang ; Mingxuan Sun ; Yalin Fang ; Shanfu Sun ; Jia He
- 刊名：Journal of Materials Science
- 出版年：2016
- 出版时间：January 2016
- 年：2016
- 卷：51
- 期：2
- 页码：779-787
- 全文大小：1,218 KB
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Mingxuan Sun (1)
Yalin Fang (1)
Shanfu Sun (1)
Jia He (1)
1. School of Materials Engineering, Shanghai University of Engineering Science, Shanghai, 201620, China - 刊物类别：Chemistry and Materials Science
- 刊物主题：Chemistry
Materials Science
Characterization and Evaluation Materials
Polymer Sciences
Continuum Mechanics and Mechanics of Materials
Crystallography
Mechanics - 出版者：Springer Netherlands
- ISSN：1573-4803
文摘
CdS photocatalysts loaded with Ag2S and MoS2 as dual co-catalysts were prepared via a one-step in situ hydrothermal method using CdCl2路2.5H2O, H2MoO4, AgNO3路9H2O, and CS(NH2)2 as the raw materials. The as-prepared photocatalysts were characterized by X-ray diffraction, scanning electron microscopy, transmission electron micrograph, X-ray photoelectron spectroscopy, photoluminescence spectra, and Ultraviolet鈥揤isible diffuse reflectance spectroscopy (UV鈥揤is DRS). The highest photocatalytic degradation rate was achieved for Ag2S/MoS2/CdS composites (87 %) compared to MoS2/CdS composites (66 %) and CdS (62 %) under visible light illumination for 60 min. The recycled photocatalytic experiments showed that the photocatalytic stability of CdS was improved with the introduction of Ag2S and MoS2. The improved photocatalytic performance of Ag2S/MoS2/CdS composites can be ascribed to the red shift of absorption edge, enhanced light absorption intensity, and the increased separation of the photoinduced electron鈥揾ole pairs, which was attributed to the synergetic effect of MoS2 and Ag2S on CdS. It was proven that Ag2S and MoS2 can act as effective dual co-catalysts to enhance the photocatalytic degradation activity of CdS.