Preparation of titania-coated polystyrene particles in mixed solvents by ammonia catalysis

Langmuir : the ACS Journal of Surfaces and Colloids
Peng WangFang-Qiong Tang

Abstract

A mixed-solvent method was developed to coat polystyrene (PS) spheres with smooth, homogeneous shells of amorphous titania by ammonia catalysis. The TEM images showed that, in the presence of ammonia, the thickness of titania shells could be controlled in the range of 8-65 nm by varying the concentration of titanium tetrabutoxide (TBOT) in the ethanol/acetonitrile mixed solvents with an appropriate volume ratio. The diffusion-controlled mechanism of the mixed solvents and the catalysis mechanism of ammonia were investigated. After the calcination of core-shell particles for 2 h at 500 degrees C, spherical hollow titania shells could be obtained, and the surfaces of the particles remained quite smooth and homogeneous. The XRD analysis indicated that calcination promoted the transformation of amorphous titania into an anatase phase.

References

Apr 5, 2000·Chemistry : a European Journal·F Caruso
Jun 14, 2005·Angewandte Chemie·Jing Li, Hua Chun Zeng
Sep 7, 2005·Langmuir : the ACS Journal of Surfaces and Colloids·Hiroshi NakamuraHideyuki Nakano

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Citations

Jan 1, 2009·Nanoscale Research Letters·Xianwei MengJun Ren
Dec 14, 2011·ACS Applied Materials & Interfaces·Bo PengFangqiong Tang
Dec 26, 2013·Langmuir : the ACS Journal of Surfaces and Colloids·Ting Huang, Dong Qiu
Jan 22, 2014·Langmuir : the ACS Journal of Surfaces and Colloids·Kathryn A Whitaker, Eric M Furst
Oct 24, 2008·Journal of Colloid and Interface Science·Bo PengJun Ren
Jul 12, 2014·Chemical Reviews·Michael DahlYadong Yin
Nov 20, 2009·Langmuir : the ACS Journal of Surfaces and Colloids·Guang JiaHongjie Zhang
Sep 30, 2009·Langmuir : the ACS Journal of Surfaces and Colloids·Mukesh AgrawalManfred Stamm
Oct 19, 2010·Langmuir : the ACS Journal of Surfaces and Colloids·Mukesh AgrawalManfred Stamm
Nov 17, 2006·Langmuir : the ACS Journal of Surfaces and Colloids·Juan ZhouLimin Wu
Nov 17, 2006·Langmuir : the ACS Journal of Surfaces and Colloids·Chao Luo, Dongfeng Xue

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