Effect of Drying Methods on Photocatalytic Activity of Nanosized Titanium Dioxide

摘要

Precursor of nanosized TiO_2 was prepared by alkoxide hydrolysis method. It was dried by common drying, far infrared drying, vacuum drying and supercritical drying before heat-treated at 600 deg C and 800 deg C. Influence of drying process and treatment temperature on the crystalline phase composition and photocatalytic activity were analyzed. The photocatalytic activity of the TiO_2 dried by common and far infrared drying is higher than that of the TiO_2 dried by vacuum and supercritical drying after treated at 600 deg C. The photocatalytic activity of the TiO_2 dried by common and far infrared drying is lower than that of the TiO_2 treated by the other two drying methods after treated at 800 deg C.