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
ISSN2046-2069
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
被引频次:41[WOS]   [WOS记录]     [WOS相关记录]
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.
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