GIEC OpenIR  > 中国科学院广州能源研究所
Effect of surface state properties of modified TiO2 powders on their photo-catalytic activity
Li, FB; Li, XJ; Li, XZ; Hou, MF; Wang, LY
2002-08-01
发表期刊TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
卷号12期号:4页码:707-711
摘要With an attempt to investigate the effect of gold impurity and tungsten oxide on the recombination and separation of electron-hole pairs, and disclose the effect of surface state on the photo-catalytic activity of TiO2, an innovative photo-catalyst 3% WO3/0.5%Au3+/TiO2 was prepared by means of sol-gel method. The photo-oxidation efficiency of photo-catalyst was evaluated by conducting a set of experiments to photo-degrade methylene blue (MB) in aqueous solution. The surface state properties were examined by means of surface photovoltage spectra (SPS) and electron-field-induced SPS (EFISPS). The experiments demonstrate that the strongest peak is attributed to electron excited from valence band to conduction band and the second strongest peak is attributed to electron excited from valence band to oxygen molecular for all samples. Electron is trapped by O-2 absorbed on the surface of TiO2. And,the surface state of O-2(-) forms. For (1%, 3%)Au3+/TiO2 sample, two new peaks that significantly present at 414 nm and 400 nm respectively should be attributable to gold impurity energy level. And for tungsten oxides doping samples, 4 peaks that significantly present in the region of 500similar to800 nm should be attributable to tungsten impurity energy level. The intensity of EFISPS decreases with increasing the content of gold ion or tungsten oxide when its content is no more than their optimal dosage. However, when the content of gold ion or tungsten oxide is more than their optimal dosage, impurity energy level becomes recombination center from separation center and the intensity of all peaks increases for them.
文章类型Article
关键词Surface State Titanium Dioxide Tungsten Oxide Surface Photovoltage Spectra Methylene Blue Gold Ion
WOS标题词Science & Technology ; Technology
研究领域[WOS]Metallurgy & Metallurgical Engineering
关键词[WOS]VISIBLE-LIGHT IRRADIATION ; PHOTOCATALYTIC ACTIVITY ; SEMICONDUCTOR NANOPOWDER ; BEHAVIOR ; FILM
收录类别ISTP ; SCI
语种英语
WOS类目Metallurgy & Metallurgical Engineering
WOS记录号WOS:000177317200031
引用统计
被引频次:2[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.giec.ac.cn/handle/344007/10448
专题中国科学院广州能源研究所
作者单位1.Guangdong Inst Eco Environm & Soil Sci, Guangdong Key Lab Agr Environm Pollut Integrated, Guangzhou 510650, Peoples R China
2.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510070, Peoples R China
3.Hong Kong Polytech Univ, Dept Civil & Struct Engn, Kowloon, Hong Kong, Peoples R China
推荐引用方式
GB/T 7714
Li, FB,Li, XJ,Li, XZ,et al. Effect of surface state properties of modified TiO2 powders on their photo-catalytic activity[J]. TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA,2002,12(4):707-711.
APA Li, FB,Li, XJ,Li, XZ,Hou, MF,&Wang, LY.(2002).Effect of surface state properties of modified TiO2 powders on their photo-catalytic activity.TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA,12(4),707-711.
MLA Li, FB,et al."Effect of surface state properties of modified TiO2 powders on their photo-catalytic activity".TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA 12.4(2002):707-711.
条目包含的文件
条目无相关文件。
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Li, FB]的文章
[Li, XJ]的文章
[Li, XZ]的文章
百度学术
百度学术中相似的文章
[Li, FB]的文章
[Li, XJ]的文章
[Li, XZ]的文章
必应学术
必应学术中相似的文章
[Li, FB]的文章
[Li, XJ]的文章
[Li, XZ]的文章
相关权益政策
暂无数据
收藏/分享
所有评论 (0)
暂无评论
 

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。