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题名: Preparation of titania-based catalysts for formaldehyde photocatalytic oxidation from TiCl4 by the sol-gel method
作者: Zhang, YH;  Xiong, GX;  Yao, N;  Yang, WS;  Fu, XZ
关键词: titania-based ;  photocatalysis ;  formaldehyde ;  TiCl4 ;  sol-gel
刊名: CATALYSIS TODAY
发表日期: 2001-07-01
卷: 68, 期:1-3, 页:89-95
收录类别: ISTP ;  SCI
文章类型: Article
部门归属: 5102
项目归属: 504
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: 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.
关键词[WOS]: BINARY METAL-OXIDES ;  ACIDIC PROPERTIES ;  MIXED OXIDES ;  TIO2 ;  SELECTIVITY ;  DEGRADATION ;  DIOXIDE ;  ACETONE ;  WATER ;  WO3
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000170859100012
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/85837
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, State Key Lab Catalysis, Dalian 116023, Peoples R China

Recommended Citation:
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.
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