Institutional Repository of Key Laboratory of Coastal Zone Environmental Processes, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences (KLCEP)
Singlet oxygen photogeneration and 2,4,6-TCP photodegradation at Pt/TiO2 under visible light illumination | |
Hu, Xuefeng1; Ji, Huanhuan1,2; Wu, Lei1,2 | |
发表期刊 | RSC ADVANCES |
ISSN | 2046-2069 |
2012 | |
卷号 | 2期号:32页码:12378-12383 |
关键词 | Photocatalytic Degradation Titanium-dioxide Tio2 4-chlorophenol Nanoparticles Nanomaterials Irradiation Suspension Oxidation Anatase |
产权排序 | [Hu, Xuefeng; Ji, Huanhuan; Wu, Lei] Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Zone Environm Proc, Yantai 264003, Shandong, Peoples R China; [Ji, Huanhuan; Wu, Lei] Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
通讯作者 | Hu, XF (reprint author), Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Zone Environm Proc, Yantai 264003, Shandong, Peoples R China. |
作者部门 | 中科院海岸带环境过程与生态修复重点实验室 |
英文摘要 | Pure and Pt nanoparticle-modified rutile TiO2 were synthesized via hydrolysis of TiCl4 in the absence or presence of Pt nanoparticles. HRTEM, XRD, and SEM were used to characterize the structure of the prepared catalysts. The resulting modified TiO2 catalysts show extended visible light absorbance. Photodegradation of 2,4,6-trichlorophenol (2,4,6-TCP) over these photocatalysts was investigated under visible light illumination. The Pt nanoparticles facilitate the separation of photogenerated electron-hole pairs at low Pt content, then enhances the photodegradation rate of 2,4,6-TCP. 0.18Pt-TiO2 achieved the best photocatalytic activity among the tested catalysts. It was found that singlet oxygen rather than (OH)-O-center dot acts as the main oxidative species for the degradation of 2,4,6-TCP according to the experimental results. The degradation intermediates of 2,4,6-TCP were identified and the degradation pathway was proposed. Pt nanoparticles on TiO2 significantly enhance O-2 adsorption and the formation of O-center dot(2). The rutile surface is a favorable condition for stabilizing O-center dot(2)-. These properties of the Pt nanoparticle-modified rutile TiO2 facilitate the formation of O-1(2) via the reaction of superoxide anions with holes.; Pure and Pt nanoparticle-modified rutile TiO2 were synthesized via hydrolysis of TiCl4 in the absence or presence of Pt nanoparticles. HRTEM, XRD, and SEM were used to characterize the structure of the prepared catalysts. The resulting modified TiO2 catalysts show extended visible light absorbance. Photodegradation of 2,4,6-trichlorophenol (2,4,6-TCP) over these photocatalysts was investigated under visible light illumination. The Pt nanoparticles facilitate the separation of photogenerated electron-hole pairs at low Pt content, then enhances the photodegradation rate of 2,4,6-TCP. 0.18Pt-TiO2 achieved the best photocatalytic activity among the tested catalysts. It was found that singlet oxygen rather than (OH)-O-center dot acts as the main oxidative species for the degradation of 2,4,6-TCP according to the experimental results. The degradation intermediates of 2,4,6-TCP were identified and the degradation pathway was proposed. Pt nanoparticles on TiO2 significantly enhance O-2 adsorption and the formation of O-center dot(2). The rutile surface is a favorable condition for stabilizing O-center dot(2)-. These properties of the Pt nanoparticle-modified rutile TiO2 facilitate the formation of O-1(2) via the reaction of superoxide anions with holes. |
文章类型 | Article |
资助机构 | National Natural Science Foundation of China [41076040, 20807036]; Chinese Academy of Sciences [KZCX2-YW-JS208]; Yantai Science & Technology Bureau [2010160] |
收录类别 | SCI |
语种 | 英语 |
关键词[WOS] | PHOTOCATALYTIC DEGRADATION ; TITANIUM-DIOXIDE ; TIO2 ; 4-CHLOROPHENOL ; NANOPARTICLES ; NANOMATERIALS ; IRRADIATION ; SUSPENSION ; OXIDATION ; ANATASE |
研究领域[WOS] | Chemistry |
WOS记录号 | WOS:000312148500051 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://ir.yic.ac.cn/handle/133337/6048 |
专题 | 中国科学院海岸带环境过程与生态修复重点实验室 |
作者单位 | 1.Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Zone Environm Proc, Yantai 264003, Shandong, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
推荐引用方式 GB/T 7714 | Hu, Xuefeng,Ji, Huanhuan,Wu, Lei. Singlet oxygen photogeneration and 2,4,6-TCP photodegradation at Pt/TiO2 under visible light illumination[J]. RSC ADVANCES,2012,2(32):12378-12383. |
APA | Hu, Xuefeng,Ji, Huanhuan,&Wu, Lei.(2012).Singlet oxygen photogeneration and 2,4,6-TCP photodegradation at Pt/TiO2 under visible light illumination.RSC ADVANCES,2(32),12378-12383. |
MLA | Hu, Xuefeng,et al."Singlet oxygen photogeneration and 2,4,6-TCP photodegradation at Pt/TiO2 under visible light illumination".RSC ADVANCES 2.32(2012):12378-12383. |
条目包含的文件 | 下载所有文件 | |||||
文件名称/大小 | 文献类型 | 版本类型 | 开放类型 | 使用许可 | ||
Singlet oxygen photo(494KB) | 开放获取 | -- | 浏览 下载 |
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。
修改评论