Synthesis of anatase TiO2 supported on porous solids by chemical vapor deposition

Ding, Z, Hu, XJ, Yue, PL, Lu, GQ and Greenfield, PF (2001) Synthesis of anatase TiO2 supported on porous solids by chemical vapor deposition. Catalysis Today, 68 1-3: 173-182. doi:10.1016/S0920-5861(01)00298-X


Author Ding, Z
Hu, XJ
Yue, PL
Lu, GQ
Greenfield, PF
Title Synthesis of anatase TiO2 supported on porous solids by chemical vapor deposition
Journal name Catalysis Today   Check publisher's open access policy
ISSN 0920-5861
Publication date 2001-01-01
Sub-type Article (original research)
DOI 10.1016/S0920-5861(01)00298-X
Volume 68
Issue 1-3
Start page 173
End page 182
Total pages 10
Place of publication Amsterdam
Publisher Elsevier Science Bv
Language eng
Abstract Coating anatase TiO2 onto three different particle supports, activated carbon (AC), gamma -alumina (Al2O3) and silica gel (SiO2), by chemical vapor deposition (CVD) was studied. The effect of the CVD synthesis conditions on the loading rate of anatase TiO2 was investigated. It was found that introducing water vapor during CVD or adsorbing water before CVD was crucial to obtain anatase TiO2 on the surface of the particle supports. The evaporation temperature of precursor, deposition temperature in the reactor, flow rate of carrier gas, and the length of coating time were also important parameters to obtain more uniform and repeatable TiO2 coating. High inflow precursor concentration, high CVD reactor temperature and long coating time tended to cause block problem. Coating TiO2 onto small particles by CVD involved both chemical vapor deposition and particle deposition. It was believed that the latter was the reason for the block problem. In addition, the mechanism of CVD process in this study included two parts, pyrolysis and hydrolysis, and one of them was dominant in the CVD process under different synthesis route. Among the three types of materials, silica gel, with higher surface hydroxyl groups and macropore surface area, was found to be the most efficient support in terms of both anatase TiO2 coating and photocatalytic reaction. (C) 2001 Elsevier Science B.V. All rights reserved.
Keyword Chemistry, Applied
Chemistry, Physical
Engineering, Chemical
Cvd
Anatase
Particle Support
Photocatalysis
Tio2
Dioxide Thin-films
Kinetics
Mocvd
Gas
Photocatalyst
Surfaces
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Australian Institute for Bioengineering and Nanotechnology Publications
 
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Created: Mon, 13 Aug 2007, 22:31:27 EST