Macrostructure-controlled titania ceramics derived from particle-stabilized emulsions: Preparation and photocatalysis performance

Abstract

To enhance the photocatalytic efficiency and resolve the titania recovery problem, we studied the processing of particle-stabilized emulsions for preparing porous TiO2 ceramics in this study. The samples were synthesized with different solid contents from 15 vol% to 30 vol%. The solid content markedly affected the pore structure and morphology. When the solid content in the precursor was controlled at 30 vol%, the sample had the three-dimensional interpenetrating structure with high porosity and uniform pore structure and the average pore size was about 3–18 μm. With excellent pore structures, the samples show the high adsorption capacity and excellent photocatalysis performance for Rhodamine B. Furthermore, when porous TiO2 ceramic was covered by a 2 nm carbon film layer (C/TiO2), the adsorption efficiency and photocatalytic degradation rates were efficiently improved.