Jornal de Técnicas Analíticas e Bioanalíticas

Abstrato

Photocatalytic Studies of Tio2/Sio2 Nanocomposite Xerogels

Muhammad Yaseen, Zeban Shah, Renato Veses C, Silvio Dias LP, Éder Lima C, Glaydson dos Reis S, Julio Vaghetti CP, Wagner Alencar SD and Khalid Mehmood

The use of titania-silica materials in photocatalytic processes has been proposed as an alternative to the conventional TiO2 catalysts, in order to facilitate the separation of products after the reaction. However, despite the large number of research in this field, the mechanism governing the photocatalytic activity of the mixed TiO2/SiO2 oxides is not clear. Titania-Silica nanocomposite xerogels were prepared by sol-gel method. This work has been used to describe the synthesis and the photocatalytic properties of TiO2-SiO2 nanocomposite xerogel. The nanocomposite xerogels were prepared by keeping the molar ratio of TEOS:TTIP:MtOH:DIW at 1: 1:6:14 respectively and the catalysts used were HCl and NH4OH. After the preparation xerogels were characterized by FTIR, XRD, UV and LLS. All these techniques show the amorphous nature of Titania-silica xerogel.