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Citation: DONG Rulin, LIU Shuyun, CHEN Zhidong, JIN Changchun, WANG Caixia. Self-cleaning TiO₂ Film Prepared by Microemulsion-mediated Hydrothermal Method[J]. Chinese Journal of Applied Chemistry, ;2013, 30(8): 938-944. doi: 10.3724/SP.J.1095.2013.20460 shu

Self-cleaning TiO₂ Film Prepared by Microemulsion-mediated Hydrothermal Method

School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China

Received Date: 12 October 2012
Revised Date: 9 January 2013

Self-cleaning TiO₂ films were prepared by hydrothermally treating a microemulsion followed by dipcoating. Effect of the amount of surfactant dodecylbenzenesulfonic acid(DBS) in the microemulsion on the surface morphology and microstructure of TiO₂ film was investigated. Photocatalytic activity,photo-induced hydrophilicity and self-cleaning efficiency of the synthesized TiO₂ films were evaluated. With the amount of DBS increases,the size of the dispersed TiO₂ particle decreases,but the particles tend to agglomerate after hydrothermal treatment. When the amount of DBS is in the range of 0 and 58 mg/L,the resultant TiO₂ films consisted of particles with 15~20 nm in diameter are quite smooth. The water contact angles of those films kept in dark increase slowly and their superhydrophilicity can be quickly recovered after irradiation by UV light. The surfaces maintain clean when the films are exposed to outdoor atmosphere for 25 days with their contact angles increasing from 0° to 14°~18°. When the amount of DBS is increased to beyond 580 mg/L,the surfaces of the films become rough and show poor hydrophilicity. The contact angles of the surfaces exposed to outdoor atmosphere for 25 days increase from 0 to 46°~48°.
- microemulsion,
- TiO₂ film,
- self-cleaning,
- dodecylbenzenesulfonic acid
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Self-cleaning TiO₂ Film Prepared by Microemulsion-mediated Hydrothermal Method