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题名: Photocatalytic H-2 and O-2 evolution over tungsten oxide dispersed on silica
作者: Liu, Gang1;  Wang, Xiuli1;  Wang, Xiang1;  Han, Hongxian1;  Li, Can1
关键词: Tungsten oxide ;  Photocatalysis ;  Water splitting ;  Semiconductor ;  Sol-gel
刊名: JOURNAL OF CATALYSIS
发表日期: 2012-09-01
DOI: 10.1016/j.jcat.2012.06.003
卷: 293, 页:61-66
收录类别: SCI
文章类型: Article
类目[WOS]: Chemistry, Physical ;  Engineering, Chemical
研究领域[WOS]: Chemistry ;  Engineering
英文摘要: Tungsten oxide dispersed on silica (WO3/SiO2) as photocatalysts was prepared by sol-gel method and characterized with various techniques, including X-ray diffraction (XRD), UV Raman spectroscopy (UV Raman), UV-vis spectroscopy (UV-vis), N-2-adsorption, X-ray photoelectron spectra (XPS), and high-resolution transmission electron microscopy (HRTEM). The characterization results show that most of tungsten oxide species are present as nanoparticles, which are highly dispersed on the surface of silica. Compared to bulk WO3, WO3/SiO2 exhibits relatively high visible-light-driven O-2 evolution activity in the presence of Fe3+ ions as sacrificial reagents. Interestingly, it is found that WO3/SiO2 also shows H-2 evolution activity with methanol as sacrificial reagents under UV light. The high photocatalytic O-2 evolution and unexpected H-2 generation properties of WO3/SiO2 could be correlated with the presence of highly dispersed WO3 nanoparticles and their interface W-O-Si like species. (C) 2012 Elsevier Inc. All rights reserved.
关键词[WOS]: LIGHT-DRIVEN PHOTOCATALYSTS ;  VISIBLE-LIGHT ;  HYDROGEN-PRODUCTION ;  CITRIC-ACID ;  WATER ;  SEMICONDUCTOR ;  NANOCOMPOSITES ;  NANOCRYSTALS ;  PERFORMANCE ;  CATALYSTS
语种: 英语
WOS记录号: WOS:000308836800006
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/142880
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China

Recommended Citation:
Liu, Gang,Wang, Xiuli,Wang, Xiang,et al. Photocatalytic H-2 and O-2 evolution over tungsten oxide dispersed on silica[J]. JOURNAL OF CATALYSIS,2012,293:61-66.
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