Photocatalytic Properties of Mesoporous TiO2 Films Derived from Evaporation-Induced Self-Assembly Method

Abstract:

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Hexagonal and cubic mesoporous TiO2 films were prepared by using triblock copolymer-templated sol-gel method via evaporation-induced self-assembly (EISA) process. The mesophase of TiO2 film was controlled by spin-speed during the spin-coating process. The hexagonal mesoporous structure was formed at a high spin-speed around 2000 rpm, whereas the cubic mesostructure was formed at a low spin-speed around 600 rpm. XRD and TEM results indicate that those mesostructures are highly organized with a pore diameter of 7 nm. The prepared cubic and hexagonal mesoporous films were tested as photocatalysts for the decomposition of 2-propanol in gas phase. Both films presented considerably higher photocatalytic activity than a nonporous TiO2 films prepared by a typical sol-gel process without addition of triblock copolymer. Notably, we found that the cubic mesoporous films showed a relatively higher photocatalytic activity than the hexagonal mesostructured film. We believe this is due to the orientation of pore channels open on the surface of mesoporous films.

Info:

Periodical:

Materials Science Forum (Volumes 510-511)

Edited by:

Hyung Sun Kim, Yu Bao Li and Soo Wohn Lee

Pages:

58-61

DOI:

10.4028/www.scientific.net/MSF.510-511.58

Citation:

J. H. Pan et al., "Photocatalytic Properties of Mesoporous TiO2 Films Derived from Evaporation-Induced Self-Assembly Method", Materials Science Forum, Vols. 510-511, pp. 58-61, 2006

Online since:

March 2006

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$35.00

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