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《Chinese Journal of Catalysis》 2011-01
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Influence of Pt Promoter on the Visible Light Photocatalytic Properties of N-Doped TiO_2

ZHENG Huarong,CUI Yanjuan,ZHANG Jinshui,DING Zhengxin,WANG Xinchen State Key Laboratory Breeding Base of Photocatalysis,Fuzhou University,Fuzhou 350002,Fujian,China  
The influence of Pt as a promoter on the photocatalytic performance of nitrogen-doped TiO2 was described.The sample was characterized by X-ray diffraction,transmission electron microscopy,X-ray photoelectron spectroscopy,UV-Vis diffuse reflectance spectroscopy,photoelectrochemistry,and photoluminescence.The degradation of methyl orange in aqueous solution under visible light irradiation was used to evaluate the photocatalytic activity of the sample.The modification of N-TiO2 with Pt did not change the crystal structure and the mesoporous structure of TiO2.The loading of Pt enhanced the material absorption in visible light region,which is assigned to background absorption that has detrimental effect on photocatalytic activity.However,the highly dispersed Pt on the surface of N-TiO2 remarkably altered the surface structure(surface state) of N-TiO2,contributing largely to the enhanced photocatalytic activity of nitrogen-doped TiO2.
【Key Words】: nitrogen doped titania promoter platinum photocatalyst visible light degradation
【Fund】: 国家自然科学基金(20603007 21033003);; 国家重点基础研究发展计划(973计划 2007CB613306);; 教育部“长江学者和创新团队发展计划”(PCSIRT0818);; 福建省高等学校新世纪优秀人才支持计划(XSJRC2007-19)
【CateGory Index】: O643.36
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