Preparation of titania-based catalysts for formaldehyde photocatalytic oxidation from TiCl4 by the sol-gel method

	Preparation of titania-based catalysts for formaldehyde photocatalytic oxidation from TiCl4 by the sol-gel method
	Zhang, YH; Xiong, GX; Yao, N; Yang, WS; Fu, XZ
刊名	catalysis today
	2001-07-01
卷号	68 期号:1-3 页码:89-95
关键词	titania-based photocatalysis formaldehyde TiCl4 sol-gel
英文摘要	titania sols were prepared by acid hydrolysis of a ticl4 precursor instead of titanium alkoxides. the effect of acid concentration on the particle size and stability of sol was investigated. stable titania sols with mean particle size of 14 nm could be obtained when the h+/ti molar ratio was 0.5. the titania sols were modified with pt, sio2, zro2, wo3 and moo3 to prepare a series of modified catalysts, which were used for the photocatalytic oxidation of formaldehyde at 37 degreesc. they showed different photocatalytic activities due to the influence of the additives. comparing with pure tio2, the addition of silica or zirconia increased the photocatalytic activity, while the addition of pt and moo3 decreased the activity, and the addition of wo3 had little effect on the activity. it is of great significance that the conversion of formaldehyde was increased up to 94% over the sio2-tio2 catalyst. the increased activity was partly due to higher surface area and porosity or smaller crystallite size. a comparison of our catalyst compositions with the literature in this field suggested that the difference in activity due to the addition of a second metal oxide maybe caused by the surface chemistry of the catalysts, particularly the acidity. (c) 2001 elsevier science 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]	binary metal-oxides ; acidic properties ; mixed oxides ; tio2 ; selectivity ; degradation ; dioxide ; acetone ; water ; wo3
收录类别	ISTP ; SCI
原文出处	true
语种	英语
WOS记录号	WOS:000170859100012
公开日期	2010-11-30
内容类型	期刊论文
源URL	[http://159.226.238.44/handle/321008/85837]
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	Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
推荐引用方式 GB/T 7714	Zhang, YH,Xiong, GX,Yao, N,et al. Preparation of titania-based catalysts for formaldehyde photocatalytic oxidation from TiCl4 by the sol-gel method[J]. catalysis today,2001,68(1-3):89-95.
APA	Zhang, YH,Xiong, GX,Yao, N,Yang, WS,&Fu, XZ.(2001).Preparation of titania-based catalysts for formaldehyde photocatalytic oxidation from TiCl4 by the sol-gel method.catalysis today,68(1-3),89-95.
MLA	Zhang, YH,et al."Preparation of titania-based catalysts for formaldehyde photocatalytic oxidation from TiCl4 by the sol-gel method".catalysis today 68.1-3(2001):89-95.