Singlet oxygen photogeneration and 2,4,6-TCP photodegradation at Pt/TiO2 under visible light illumination
文献类型：期刊论文
| 作者 | Hu, Xuefeng1 ; Ji, Huanhuan1,2; Wu, Lei1,2
|
| 刊名 | RSC ADVANCES
 |
| 出版日期 | 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 |
| ISSN号 | 2046-2069 |
| 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. |
| 中文摘要 | 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. |
| 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. |
| 学科主题 | Chemistry |
| 研究领域[WOS] | Chemistry |
| 关键词[WOS] | PHOTOCATALYTIC DEGRADATION ; TITANIUM-DIOXIDE ; TIO2 ; 4-CHLOROPHENOL ; NANOPARTICLES ; NANOMATERIALS ; IRRADIATION ; SUSPENSION ; OXIDATION ; ANATASE |
| 收录类别 | SCI |
| 资助信息 | National Natural Science Foundation of China [41076040, 20807036]; Chinese Academy of Sciences [KZCX2-YW-JS208]; Yantai Science & Technology Bureau [2010160] |
| 原文出处 | http://dx.doi.org/10.1039/c2ra21661b |
| 语种 | 英语 |
| WOS记录号 | WOS:000312148500051 |
| 公开日期 | 2013-03-08 |
| 源URL | [http://ir.yic.ac.cn/handle/133337/6049]  |
| 专题 | 烟台海岸带研究所_中科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. |
入库方式： OAI收割
来源：烟台海岸带研究所
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