| 水热法合成多孔Ag_2S敏化二氧化钛催化剂及其可见光催化活性(英文) |
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| 引用本文： | TRISHA Ghosh,OH Won-Chun. 水热法合成多孔Ag_2S敏化二氧化钛催化剂及其可见光催化活性(英文)[J]. 催化学报, 2012, 0(2): 254-260 |
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| 作者姓名： | TRISHA Ghosh OH Won-Chun |
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| 作者单位： | Department of Advanced Materials Science & Engineering,Hanseo University |
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| 基金项目： | supported by the Department of Science & Technology, New Delhi under SERC Scheme, DST No. SR/S1/PC-40/2006 |
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| 摘 要： | Porous Ag2S sensitized TiO2 catalysts were synthesized by the hydrothermal process.The crystallization and porous structure of the Ag2S/TiO2 composite photocatalysts were investigated by X-ray diffraction,scanning electron microscopy with energy dispersive X-ray analysis,UV-Vis diffuse reflectance spectroscopy,and N2 adsorption.The Ag2S/TiO2 composites were mainly composed of anatase TiO2 and acanthite Ag2S.The absorption edge wavelengths of TiO2 and the Ag2S/TiO2 composite prepared with 3 mmol Na2S.5H2O were 400 and 800 nm,respectively,that is,the absorption edge of the composite had a pronounced red shift.The photocatalytic activity under visible light was investigated by the degradation of methylene blue with a UV-Vis spectrophotometer.The photocatalytic activities under visible light of the Ag2S/TiO2 photocatalysts were much higher than that of TiO2.
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| 关 键 词： | silver sulfide titanium dioxide visible light photocatalytic activity methylene blue |
Hydrothermal Synthesis of Porous Ag2S Sensitized TiO2 Catalysts and Their Photocatalytic Activities in the Visible Light Range |
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| ZHU Lei,MENG Zeda,TRISHA Ghosh,OH Won-Chun. Hydrothermal Synthesis of Porous Ag2S Sensitized TiO2 Catalysts and Their Photocatalytic Activities in the Visible Light Range[J]. Chinese Journal of Catalysis, 2012, 0(2): 254-260 |
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| Authors: | ZHU Lei MENG Zeda TRISHA Ghosh OH Won-Chun |
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| Affiliation: | Department of Advanced Materials Science & Engineering,Hanseo University,Chungnam 356-706,Korea |
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| Abstract: | Porous Ag2S sensitized TiO2 catalysts were synthesized by the hydrothermal process.The crystallization and porous structure of the Ag2S/TiO2 composite photocatalysts were investigated by X-ray diffraction,scanning electron microscopy with energy dispersive X-ray analysis,UV-Vis diffuse reflectance spectroscopy,and N2 adsorption.The Ag2S/TiO2 composites were mainly composed of anatase TiO2 and acanthite Ag2S.The absorption edge wavelengths of TiO2 and the Ag2S/TiO2 composite prepared with 3 mmol Na2S.5H2O were 400 and 800 nm,respectively,that is,the absorption edge of the composite had a pronounced red shift.The photocatalytic activity under visible light was investigated by the degradation of methylene blue with a UV-Vis spectrophotometer.The photocatalytic activities under visible light of the Ag2S/TiO2 photocatalysts were much higher than that of TiO2. |
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| Keywords: | silver sulfide titanium dioxide visible light photocatalytic activity methylene blue |
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