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学科主题: 物理化学
题名: Synergic effect of cation doping and phase composition on the photocatalytic performance of TiO2 under visible light
作者: Yu, Fuhai1, 2;  Wang, Yanjie1, 2;  Tang, Hailian1, 2;  Zhang, Yanjie1;  Jin, Changzi1;  Liu, Xin1;  Li, Mingrun1;  Wang, Junhu1
通讯作者: 王军虎
关键词: Cation doping ;  Phase composition ;  Titanium dioxide ;  Synergic effect ;  Visible light ;  Photocatalyst
刊名: CATALYSIS COMMUNICATIONS
发表日期: 2014-06-05
DOI: 10.1016/j.catcom.2014.03.024
卷: 51, 期:1, 页:46-52
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Physical
研究领域[WOS]: Chemistry
英文摘要: The synergic effect of cation doping and phase composition for the further improvement of the photocatalytic activity of TiO2 under visible light is reported for the first time. Fe3+ and Sn4+ co-doped TiO2 with optimized phase composition were synthesized through a simple soft-chemical solution method. The visible-light-driven photocatalytic activity of Fe3+ and Sn4+ co-doped TiO2 was 5 times of that of Evonik P25 TiO2 using degradation of methylene blue as model reaction. The synthesized photocatalysts were characterized by powder X-ray diffraction, UV-Vis diffuse reflectance spectroscopy, X-ray photoelectron spectroscopy, Sn-119 Mossbauer spectroscopy, and X-ray absorption fine structure spectroscopy. It is indicated that Sn4+ doping can facilitate the phase transition from anatase to rutile. The different ratios of anatase and rutile can be achieved by tuning the amount of Se4+ doped into the lattice. Furthermore, the doping of Se4+ into TiO2 lattice can stabilize the phase composition when Fe3+ is co-doped. In the Fe3+ and Se4+ co-doped TiO2, Sn4+ is mainly used to tune and stabilize the phase composition of TiO2 and Fe3+ acts as a doping cation to narrow the band gap of TiO2. Both band gap and phase composition of TiO2 can be tuned effectively by the simultaneous introduction of Fe3+ and Sn4+. The synergic effect of optimized phase composition (anatase/rutile = 25/75) and narrowed band gap should be the two main reasons for the promoted photocatalytic activity of TiO2 under visible light. (C) 2014 Elsevier B.V. All rights reserved.
关键词[WOS]: TITANIUM-DIOXIDE ;  MOSSBAUER-SPECTRA ;  SURFACE PHASES ;  ANATASE TIO2 ;  THIN-FILMS ;  NANOPARTICLES ;  RUTILE ;  XAFS ;  SPECTROSCOPY ;  DEGRADATION
语种: 英语
WOS记录号: WOS:000336469200011
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/144321
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, Dalian 116023, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China

Recommended Citation:
Yu, Fuhai,Wang, Yanjie,Tang, Hailian,et al. Synergic effect of cation doping and phase composition on the photocatalytic performance of TiO2 under visible light[J]. CATALYSIS COMMUNICATIONS,2014,51(1):46-52.
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