Influence of Factors on Porous TiO2 Films Prepared at Room Temperature

doi:10.3724/SP.J.1077.2007.00937

Abstract

Abstract: A solution consisting of styrene-acrylate spheres and anatase TiO₂ colloidal particles was synthesized. The films were
prepared from resultant solution by a dip-coating technique, and then styrene-acrylate spheres were preferentially dissolved in toluene, and the porous anatase TiO₂ films were obtained at room temperature. Transmission electron microscope (TEM)
and scanning electron microscope (SEM) were adopted to analyze the influence of the styrene-acrylate emulsion consumption, the dosage of TiO₂ sol, the aging time of the solutions and the conditions of eliminating styrene-acrylate spheres
on the morphology of the films. The results show that the mass ratio of TiO₂ sol and styrene-acrylate emulsion affects the morphology of the pores; the aging time is a dominant factor for the formation of the dense pores on the surface;
styrene-acrylate spheres can be eliminated effectively by the ultrasonic oscillation. The results also indicate that the appropriate proportion is: 15g TiO₂ sol+0.2g styrene-acrylate emulsion+10g H₂O; the solutions are aged for 15d, and the films are soaked into toluene and vibrated by ultrasonic for 10min.

Key words: titania film, porosity, styrene-acrylate emulsion, room-temperature preparation

CLC Number:

O643

SHEN Qian-Hong,CAI Zhen-Qian,GAO Ji-Wei,YANG Hui. Influence of Factors on Porous TiO₂ Films Prepared at Room Temperature[J]. Journal of Inorganic Materials, DOI: 10.3724/SP.J.1077.2007.00937.

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Influence of Factors on Porous TiO₂ Films Prepared at Room Temperature

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