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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
关键词Titania-based Photocatalysis Formaldehyde Ticl4 Sol-gel
刊名CATALYSIS TODAY
2001-07-01
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
关键词[WOS]BINARY METAL-OXIDES ; ACIDIC PROPERTIES ; MIXED OXIDES ; TIO2 ; SELECTIVITY ; DEGRADATION ; DIOXIDE ; ACETONE ; WATER ; WO3
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.
语种英语
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WOS记录号WOS:000170859100012
引用统计
被引频次:99[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/85837
专题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
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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.
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