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Issue 44, 2014
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UV/ozone-assisted low temperature preparation of mesoporous TiO2 with tunable phase composition and enhanced solar light photocatalytic activity

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Abstract

In this paper, we report a UV/ozone-assisted method for low temperature preparation of mesoporous TiO2 with controlled crystalline phase. The results showed that the crystallization of mesoporous TiO2 can occur at temperatures as low as 100 °C under UV/ozone irradiation. Highly crystalline mesoporous anatase TiO2 was obtained after UV/ozone treatment at 200 °C. The phase transformation from anatase to rutile occurred during the UV/ozone treatment at 300 °C and mesoporous bicrystalline TiO2 with a controlled mixture of anatase and rutile phases was prepared by adjusting the exposure time. The photocatalytic performance of the mesoporous TiO2 strongly depends on the crystal structures and the bicrystalline mesoporous TiO2 exhibits remarkably enhanced solar light photocatalytic activity. This technique can be useful for low temperature preparation of crystalline mesoporous titania on various substrates and may be generalized to the synthesis of other materials.

Graphical abstract: UV/ozone-assisted low temperature preparation of mesoporous TiO2 with tunable phase composition and enhanced solar light photocatalytic activity

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Article information


Submitted
05 Aug 2014
Accepted
16 Sep 2014
First published
16 Sep 2014

J. Mater. Chem. A, 2014,2, 18791-18795
Article type
Paper

UV/ozone-assisted low temperature preparation of mesoporous TiO2 with tunable phase composition and enhanced solar light photocatalytic activity

X. Zhang, J. Yao, M. Ali, J. Wei, H. Wang, L. Y. Yeo, J. R. Friend and D. R. MacFarlane, J. Mater. Chem. A, 2014, 2, 18791
DOI: 10.1039/C4TA04020A

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