Synthesis and Photocatalytic Activity of Modified TiO2 Thin Films Prepared by Spray Pyrolysis

Abstract

TiO₂ and silver doped TiO₂ thin films were prepared by spray pyrolysis technique and their photocatalytic activity were determined. Titanium(IV) isopropoxide solution or its mixture with silver nitrate were used as precursors. As-prepared at 300 °C films were X-ray amorphous. Calcination of the films at 500 °C for 5 – 6 hours allowed to obtain partially crystalline anatase films with uniform grain size in the range of 80 – 150 nm. Degradation degree of MB water solution by using TiO₂ and TiO₂/Ag photocatalysts under UV irradiation reached 60 and 70 % respectively.