Fabrication of porous nanostructured TiO 2 particles by an aerosol templating method

Abstract

An aerosol templating method was applied to fabricate the spherical nanostructured TiO 2 particles containing both mesopores and macropores using two kinds of colloidal mixture such as polystyrene latex (PSL) particles and TiO 2 nanoparticles (P25), and PSL and a titanium hydroxybislactato (TC315). As the weight ratio of PSL/P25 increased from 0 to 1.30, morphology of the as-prepared particles changed from mesoporous particles to particles containing mesopores and macropores. As the furnace temperature decreased from 800 to 600 °C at the fixed process conditions, the increase of mesopore volume and specific surface area were determined. The TiO 2 particles fabricated from a mixture of TC315 and PSL were composed of lots of mesopores and a few macropores. The width of UV-absorption spectra of the porous particles synthesized from two colloidal mixtures decreased a little with respect to the increase of the weight ratio. The complete decomposition of p-xylene of 97.9 ppm was accomplished within 2 h under the illumination of UV-light by all the porous particles.