Fabrication and photocatalytic activity of photocatalyst balls by MCT and acid bath treatment

Abstract

In this study, TiO₂ photocatalyst balls were prepared by sulfuric and acetic acid bath treatment and subsequent heat oxidation. The photocatalytic activity was investigated and discussed relating the conditions (temperature, concentration and time) of the acid bath. TiO₂ photocatalyst with anatase type was obtained by the acid bath treatment and subsequent heat oxidation. The photocatalytic activity reached R = 10.3 nmol・L^-1・min^-1 for the sample by the sulfuric acid treatment with concentration of 0.25 mol/L at 393 K for 60 min. The influence of the formation of anatase type TiO₂, the corrosion in the acid bath treatment and the microstructures of the surface of TiO₂ photocatalyst balls on the photocatalytic activity was discussed.