Im provement of photocatalytic activity an d stabilit y by immo bilization of TiO۲ o n the hexagonal me soporous silicate

Photocatalytic purification of wastewater treatment as a method of AOP processes has been widel y used for r emove of organic pollutants of wat er in the lib ratory scale. Many liter atures have been publish ed about the good photoefficiency of TiO۲ in a natase phase for degrad ation and mineralizatio n of organic compounds such as textile dyes [۱- ۲].One o f the main problems of using TiO۲ is the d eactivation of photocatalyst during the reacti on [۳]. It has been found that the absorption of organic dyes on the e xternal surfa ce of photo catalyst pre vents the UV absorption and excitation of Ti O۲ for electron donation and photo catalytic re actions. In this work the dispers ion of pho tocatalyst on the hexagonal mesop orous silicate (HMS) and study of its effect on the stability of the p hotocatalyst were investigated.