The role of crystal phase in determining photocatalytic activity of nitrogen doped TiO(2)

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	The role of crystal phase in determining photocatalytic activity of nitrogen doped TiO(2)
	G. Liu; X. W. Wang; Z. G. Chen; H. M. Cheng; G. Q. Lu
	2009
发表期刊	Journal of Colloid and Interface Science
ISSN	0021-9797
卷号	329 期号:2 页码:331-338
摘要	Two series of nitrogen doped TiO(2) samples with different ratios of anatase to rutile phases were prepared by milling the mixture of P25 TiO(2) and C(6)H(12)N(4) in air and gaseous NH(3) atmosphere, respectively. Compared to air, NH(3) atmosphere plays an important role in delaying the crystallite transformation from anatase to rutile in the mechanochemical reaction of TiO(2) and C(6)H(12)N(4). In contrast to the previously reported results for pure TiO(2), it is found that nitrogen doped TiO(2) with higher content of rutile phase demonstrates higher photocatalytic activity in photodegrading pollutant Rhodamine B under both UV light and visible light irradiation (lambda > 420 nm), and the amount of the surface-adsorbed water and hydroxyl groups on nitrogen doped TiO(2) have little correlations with their crystallite phases (anatase or rutile) and photocatalytic activity. The more abundant surface states characterized by photoluminescence spectroscopy together with the lowered valence band maximum of rutile TiO(2) by nitrogen doping are considered as the key factors for the higher activity of nitrogen doped TiO(2) with higher content of rutile phase. (C) 2008 Elsevier Inc. All rights reserved.
部门归属	[liu, gang; wang, xuewen; chen, zhigang; cheng, hui-ming] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. [liu, gang; lu, gao qing (max)] univ queensland, sch engn, arc ctr excellence funct nanomat, brisbane, qld 4072, australia. [liu, gang; lu, gao qing (max)] univ queensland, australian inst bioengn & nanotechnol, brisbane, qld 4072, australia.;cheng, hm (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china;cheng@imr.ac.cn maxlu@uq.edu.au
关键词	Tio(2) Anatase Rutile Nitrogen Doping Crystal Phase Visible-light Photocatalysis Titanium-dioxide Band-gap Photoelectrochemical Properties Mechanochemical Reaction Nanocrystalline Tio2 Thermal-treatment Rutile Particles Surface Science Mesoporous Tio2
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/32083
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	G. Liu,X. W. Wang,Z. G. Chen,et al. The role of crystal phase in determining photocatalytic activity of nitrogen doped TiO(2)[J]. Journal of Colloid and Interface Science,2009,329(2):331-338.
APA	G. Liu,X. W. Wang,Z. G. Chen,H. M. Cheng,&G. Q. Lu.(2009).The role of crystal phase in determining photocatalytic activity of nitrogen doped TiO(2).Journal of Colloid and Interface Science,329(2),331-338.
MLA	G. Liu,et al."The role of crystal phase in determining photocatalytic activity of nitrogen doped TiO(2)".Journal of Colloid and Interface Science 329.2(2009):331-338.