Preparation and Characterization of Thin Film TiO2 Dip Coated on Non-Conductive Substrate Prepared from Tetraethyl Orthotitanate Precursor

Influence factors of photocatalytic activity of the filter media modified by TiO2

“…But the anatase phase of higher surface area had better photocatalytic activity. When small amount anatase phase transformed into the rutile phase, the catalytic activities of mixed phases were higher than those of pure anatase phase TiO 2 [35][36][37]. In this study, the optimal temperature of heat treatment was 500 °C.…”

“…So the crystallinity of dried anatase phase and mixed phases was obviously improved. When calcination temperature was less than 550 °C, anatase phase mainly existed [37]. When calcination temperature was 550 °C, the rutile phase mainly existed and its proportion gradually increased with the rising of temperature.…”

“…Calcination effected not only the physical and chemical properties of nanocrystal of titanium oxide but also the size of grain. When calcination temperature was from 300 to 500 °C, catalyst had the best photocatalytic activity [35][36][37]. Because calcination could let the gel become dense at above temperature, and the particle size of micropore increased with the enlargement of sintering grain.…”

“…When calcination temperature was more than 700 °C, rutile phase mainly existed. The photocatalytic performance of TiO 2 strongly depended on its crystal phase and surface area [37]. The pure rutile phase TiO 2 hardly had catalytic activity.…”