Effect of synthesis temperature on the preparation of titanium dioxides by the hydrothermal method. photocatalytic activity

Abstract

TiO2 nanoparticles were prepared by the hydrolysis of titanium tetraisopropoxide (TTIP) using TMA (tetramethylamine) as a peptizer in the hydrothermal method. The photocatalytic degradation of Orange II has been studied in a batch reactor under UV light. The particle size was similar to that from hydrothermal treatment at 120-170oC, but it increased to 23 nm at 200oC. The titania particles prepared at 170oC and calcined at 600oC showed the highest activity in the photocatalytic decomposition ofOrange II.