Photosensitization of SiW11O398--modified TiO2 by Eosin Y for stable visible-light H-2 generation

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	Photosensitization of SiW11O398--modified TiO2 by Eosin Y for stable visible-light H-2 generation
	Liu X(刘兴)1; Li YX(李越湘)1; Peng SQ(彭绍琴)1; Lu GX(吕功煊)2 ; Li SB(李树本)2
刊名	International Journal of Hydrogen Energy
	2013
卷号	38 期号:27 页码:11709-11719
关键词	SiW11O398-/TiO2 Eosin Y Photosensitization H2 generation Stability
ISSN号	0360-3199
通讯作者	李越湘
英文摘要	Stability issue of dye limits greatly applications of sensitization systems. In the present work, TiO₂ was modified with a lacunary Keggin-type polyoxometalate SiW₁₁O₃₉⁸^_ (SiW₁₁). SiW₁₁ is bound at TiO₂ by a chemical interaction and its modification promotes TiO2 crystallization as well as growth of the particles. The as-prepared SiW₁₁/TiO₂ was used to construct a stable and efficient system for visible-light H₂ generation using Eosin Y (EY) as a photosensitizer and Pt as a co-catalyst. SiW11 plays a very important role in enhancement of the sensitization activity and stability of SiW₁₁/TiO₂. SiW11 as an excellent electron relay greatly facilitates the electron transfer from the reduced dye species EY^__ to conduction band (CB) of TiO₂ and suppresses the decomposition of EY^__. Thus, a stable dye-sensitized hydrogen generation system is achieved. The factors which influenced the photocatalytic hydrogen evolution such as concentration of SiW₁₁, concentration of EY, and Pt loading content were investigated. Under the optimal conditions, an average apparent quantum yield of 11.4% was obtained during 20 h irradiation (λ > 420 nm). The possible mechanism was discussed.
学科主题	物理化学与绿色催化
收录类别	SCI
资助信息	the National Nature Science Foundation of China (21163012);the National Basic Research Program of China (2009CB220003);the Innovation Fund for Graduate Student of Nanchang University (cx2011007)
语种	英语
WOS记录号	WOS:000324563200005
公开日期	2013-12-30
内容类型	期刊论文
源URL	[http://210.77.64.217/handle/362003/4930]
专题	兰州化学物理研究所_OSSO国家重点实验室兰州化学物理研究所_ERC国家工程研究中心
作者单位	1.Nanchang Univ, Dept Chem, Nanchang 330031, Peoples R China 2.Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Oxo Synth & Select Oxidat, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Liu X,Li YX,Peng SQ,et al. Photosensitization of SiW11O398--modified TiO2 by Eosin Y for stable visible-light H-2 generation[J]. International Journal of Hydrogen Energy,2013,38(27):11709-11719.
APA	Liu X,Li YX,Peng SQ,Lu GX,&Li SB.(2013).Photosensitization of SiW11O398--modified TiO2 by Eosin Y for stable visible-light H-2 generation.International Journal of Hydrogen Energy,38(27),11709-11719.
MLA	Liu X,et al."Photosensitization of SiW11O398--modified TiO2 by Eosin Y for stable visible-light H-2 generation".International Journal of Hydrogen Energy 38.27(2013):11709-11719.