Synthesis of rutile-anatase core-shell structured TiO(2) for photocatalysis

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	Synthesis of rutile-anatase core-shell structured TiO(2) for photocatalysis
	G. Liu; X. X. Yan; Z. G. Chen; X. W. Wang; L. Z. Wang; G. Q. Lu; H. M. Cheng
	2009
发表期刊	Journal of Materials Chemistry
ISSN	0959-9428
卷号	19 期号:36 页码:6590-6596
摘要	The crystal phases, surface states and hydroxyl groups of TiO(2) can intrinsically determine its performance in the applications of photocatalysis and dye-sensitized solar cells. Here we developed a unique rutile-anatase core-shell structured nanocrystalline TiO(2) with controlled surface states and hydroxyl groups for photocatalytic applications via a simple phase conversion method, where the semi-crystalline TiO2 embedded in the caramelized sucrose matrix following the hydrothermal process was first converted to a composite of TiO(x)C(y)/C by calcining in a nitrogen atmosphere, and this composite was subsequently converted to TiO(2) by calcining in an oxygen atmosphere. It was found that the rutile phase exists within anatase particles, and the depth of rutile core in the anatase shell particles can be tuned by adjusting the thickness of TiO(x)C(y) (x < y) and TiO(x)C(y) (x > y) in the precursor composite TiO(x)C(y)/C simply through changing the calcination temperature. More interestingly, the amount of surface adsorbed water and hydroxyl groups and the abundance of surface states in such core-shell structured TiO(2) can be controlled by changing the size of the rutile and anatase phases. Finally, photocatalytic degradation reaction as an example clearly demonstrates the substantial role of the surface states in determining photocatalytic activity of the TiO(2) in desired applications.
部门归属	[liu, gang; yan, xiaoxia; wang, lianzhou; lu, gao qing] univ queensland, sch engn, arc ctr excellence funct nanomat, brisbane, qld 4072, australia. [liu, gang; chen, zhigang; wang, xuewen; cheng, hui-ming] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. [liu, gang; yan, xiaoxia; wang, lianzhou; lu, gao qing] univ queensland, australia inst bioengn & nanotechnol, brisbane, qld 4072, australia.;lu, gq (reprint author), univ queensland, sch engn, arc ctr excellence funct nanomat, brisbane, qld 4072, australia;maxlu@uq.edu.au cheng@imr.ac.cn
关键词	Interfacial Electron-transfer Sensitized Solar-cells Nitrogen-doped Tio2 Visible-light Titanium-dioxide Nanocrystalline Tio2 Facile Synthesis Thin-films Phase-transformation Mesoporous Titania
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/32085
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	G. Liu,X. X. Yan,Z. G. Chen,et al. Synthesis of rutile-anatase core-shell structured TiO(2) for photocatalysis[J]. Journal of Materials Chemistry,2009,19(36):6590-6596.
APA	G. Liu.,X. X. Yan.,Z. G. Chen.,X. W. Wang.,L. Z. Wang.,...&H. M. Cheng.(2009).Synthesis of rutile-anatase core-shell structured TiO(2) for photocatalysis.Journal of Materials Chemistry,19(36),6590-6596.
MLA	G. Liu,et al."Synthesis of rutile-anatase core-shell structured TiO(2) for photocatalysis".Journal of Materials Chemistry 19.36(2009):6590-6596.