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题名: A novel approach for the preparation of phase-tunable TiO2 nanocomposite crystals with superior visible-light-driven photocatalytic activity
作者: Yu Fuhai1, 2;  Wang Junhu1;  Zhao Kunfeng1, 2;  Yin Jie1, 2;  Jin Changzi1;  Liu Xin1
关键词: Chemical solution process ;  Titanium oxide ;  Nanocomposite crystal ;  Phase modulation ;  Visible light ;  Photocatalysis ;  Adsorption capacity
刊名: CHINESE JOURNAL OF CATALYSIS
发表日期: 2013-06-01
DOI: 10.1016/S1872-2067(12)60574-9
卷: 34, 期:6, 页:1216-1223
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Applied ;  Chemistry, Physical ;  Engineering, Chemical
研究领域[WOS]: Chemistry ;  Engineering
英文摘要: A series of novel TiO2 nanocomposite crystals with superior visible-light-driven photocatalytic activity were successfully prepared using a soft chemical solution process involving direct reaction of aqueous H2O2 with a 2-ethoxyethanol solution of tetraisopropyl titanate before calcination of the resulting peroxo-titanium complexes at 500 degrees C for 4 h. The synthesized TiO2 samples are composed of anatase and rutile phases, and the ratio of rutile could be continuously tuned from 0 to 96% by altering the 2-ethoxyethanol volume. There are clear red-shifts in the UV-Vis absorption spectra and apparent band gap narrowing for the synthesized TiO2 in comparison with Evonik P-25. The synthesized TiO2 samples are found to be much more efficient for methylene blue degradation under visible-light irradiation. The optimized sample (2-ethoxyethanol: 5 ml; rutile in bulk: 46%) exhibits 5-fold higher adsorption capacity and 3-fold higher photocatalytic activity than those of Evonik P-25 (lambda >= 400 nm). Characterizations including X-ray diffraction and Raman spectroscopy reveal that the surface of the optimized TiO2 sample only contains a small quantity of rutile. It is concluded that the surface phase composition and distribution of the TiO2 nanocomposite crystals are essential to their greatly enhanced photocatalytic activities and strong adsorption capacities. In addition, the concentration of defects existing in the synthesized TiO2 is also regarded to account for these enhanced properties. (c) 2013, Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.
关键词[WOS]: ELECTROCHEMICAL PROPERTIES ;  CALCINATION TEMPERATURE ;  HYDROGEN-PRODUCTION ;  ACTIVATED CARBON ;  THIN-FILMS ;  ANATASE ;  NANOPARTICLES ;  TITANIA ;  WATER ;  DEGRADATION
语种: 英语
WOS记录号: WOS:000320747400021
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/137737
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, Liaoning, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China

Recommended Citation:
Yu Fuhai,Wang Junhu,Zhao Kunfeng,et al. A novel approach for the preparation of phase-tunable TiO2 nanocomposite crystals with superior visible-light-driven photocatalytic activity[J]. CHINESE JOURNAL OF CATALYSIS,2013,34(6):1216-1223.
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