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Preparation and characterization of silica/titania nanoparticles with tunable silica coatings
Alternative TitleRare Metal Mat. Eng.
Li, QY; Du, SF; Wu, ZJ; Chen, YF
2003-12-01
Source PublicationRARE METAL MATERIALS AND ENGINEERING
ISSN1002-185X
Volume32Issue:0Pages:772-775
Abstract

Silica coated titania nanoparticles were prepared on the basis of the hydrolysis of tetraethyl orthosilicate (TEOS) in aqueous ethanol solution with ammonia as catalyst. The various values of thickness of silica coating on titania nanoparticles were obtained by controlling the weight ratios of TEOS added to TiO2 particles in solutions. When the silica loading was 9.33 wt%, the amorphous silica coating was uniform and distinct on the titania nanoparticles and the coated nanoparticles exhibited much better UV absorbance performances. However, as the silica loading further increased to 25.19wt%, the UV absorbance performances of silica/titania nanoparticles decreased. With the increase of silica loading in coated nanoparticles, the photocatalytic activity decreased.

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Silica coated titania nanoparticles were prepared on the basis of the hydrolysis of tetraethyl orthosilicate (TEOS) in aqueous ethanol solution with ammonia as catalyst. The various values of thickness of silica coating on titania nanoparticles were obtained by controlling the weight ratios of TEOS added to TiO2 particles in solutions. When the silica loading was 9.33 wt%, the amorphous silica coating was uniform and distinct on the titania nanoparticles and the coated nanoparticles exhibited much better UV absorbance performances. However, as the silica loading further increased to 25.19wt%, the UV absorbance performances of silica/titania nanoparticles decreased. With the increase of silica loading in coated nanoparticles, the photocatalytic activity decreased.

KeywordTitania Nanoparticle Silica Coatings Photochemical Activity Methyl Orange
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
URL查看原文
Indexed BySCI
Language英语
WOS KeywordMULTIPLY COATED SUBMICROSPHERES ; PARTICLES ; ALUMINA
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000223266400204
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/5329
Collection研究所(批量导入)
AffiliationChinese Acad Sci, Inst Proc Engn, Beijing 100080, Peoples R China
Recommended Citation
GB/T 7714
Li, QY,Du, SF,Wu, ZJ,et al. Preparation and characterization of silica/titania nanoparticles with tunable silica coatings[J]. RARE METAL MATERIALS AND ENGINEERING,2003,32(0):772-775.
APA Li, QY,Du, SF,Wu, ZJ,&Chen, YF.(2003).Preparation and characterization of silica/titania nanoparticles with tunable silica coatings.RARE METAL MATERIALS AND ENGINEERING,32(0),772-775.
MLA Li, QY,et al."Preparation and characterization of silica/titania nanoparticles with tunable silica coatings".RARE METAL MATERIALS AND ENGINEERING 32.0(2003):772-775.
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