A novel approach for the preparation of phase-tunable TiO2 nanocomposite crystals with superior visible-light-driven photocatalytic activity

	A novel approach for the preparation of phase-tunable TiO2 nanocomposite crystals with superior visible-light-driven photocatalytic activity
	Yu Fuhai 1,2; Wang Junhu 1; Zhao Kunfeng 1,2; Yin Jie 1,2; Jin Changzi 1; Liu Xin 1
刊名	chinese journal of catalysis
	2013-06-01
卷号	34 期号:6 页码:1216-1223
关键词	Chemical solution process Titanium oxide Nanocomposite crystal Phase modulation Visible light Photocatalysis Adsorption capacity
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.
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
关键词[WOS]	electrochemical properties ; calcination temperature ; hydrogen-production ; activated carbon ; thin-films ; anatase ; nanoparticles ; titania ; water ; degradation
收录类别	SCI
语种	英语
WOS记录号	WOS:000320747400021
公开日期	2015-11-10
内容类型	期刊论文
源URL	[http://159.226.238.44/handle/321008/137737]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
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
推荐引用方式 GB/T 7714	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.
APA	Yu Fuhai,Wang Junhu,Zhao Kunfeng,Yin Jie,Jin Changzi,&Liu Xin.(2013).A novel approach for the preparation of phase-tunable TiO2 nanocomposite crystals with superior visible-light-driven photocatalytic activity.chinese journal of catalysis,34(6),1216-1223.
MLA	Yu Fuhai,et al."A novel approach for the preparation of phase-tunable TiO2 nanocomposite crystals with superior visible-light-driven photocatalytic activity".chinese journal of catalysis 34.6(2013):1216-1223.