LIANG Huayin ,WANG Zhumei , LUO Minhua

(School of Materials Science and Engineering, Jingdezhen Ceramic Institute, Jingdezhen, Jiangxi 333001)

Abstract: Porous ceramics coated with multilayer TiO₂ photocatalytic films was prepared by sol -gel process and then

characterized by SEM and XRD. Its adsorption before and after coating was also observed. Results show: the loaded photocatalytic TiO₂ occurs mainly in anatase and to a lesser extent in rutile; there is no obvious change to the microstructure and adsorption of porous ceramics loaded with TiO₂; methyl orange decomposition rate of TiO₂-loaded porous ceramics is lower than that of TiO₂ powder in the initial stage, but it exceeds the latter as the activity of the powder declines with the agglomeration and precipitation of the particles as reaction time increases.

Key words: porous ceramics; TiO₂ ; methyl orange