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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
KeywordTitania-based Photocatalysis Formaldehyde Ticl4 Sol-gel
Source PublicationCATALYSIS TODAY
2001-07-01
Volume68Issue:1-3Pages:89-95
Indexed ByISTP ; SCI
SubtypeArticle
Department5102
Funding Project504
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
WOS SubjectChemistry, Applied ; Chemistry, Physical ; Engineering, Chemical
WOS Research AreaChemistry ; Engineering
WOS KeywordBINARY METAL-OXIDES ; ACIDIC PROPERTIES ; MIXED OXIDES ; TIO2 ; SELECTIVITY ; DEGRADATION ; DIOXIDE ; ACETONE ; WATER ; WO3
AbstractTitania 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.
Language英语
URL查看原文
WOS IDWOS:000170859100012
Citation statistics
Cited Times:102[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/85837
Collection中国科学院大连化学物理研究所
AffiliationChinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
Recommended Citation
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.
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