Preparation and Photocatalysis of Sulfur-Doped Nano-TiO2/Ti Film
Owing to the defects of the fixed TiO2 photocatalysts, the research employed the approach of anodic oxidation to produce high efficiend S-TiO2/Ti ceramic film oxidized on the surface of titanium, in order to make the absorbable spectrum of light catalyst spread to the visible region and constrain the high recombination rate of electron-hole pairs during photoreaction. The surface appearance and the distribution of elements have been checked with scanning electron microscopy. The microcrystal structure of the films has been checked with XRD. The results showed that the main components of sulfur-doped catalyzer were rutile and anatase, meanwhile, the sulfur element distributing on the film was fairly uniform. Films of S-TiO2 photocatalysis reduction K2CrO4 revealed that with the amount of S-contained increased, the rate of reduction K2CrO4 decreased under ultraviolet light while that increased under visible light. It was found that the highest reduction rate of K2CrO4 was achieved through an optimal Na2S2O3 dosage of 0.6g/L in ceramic film prepared processes.
Yiwang Bao, Li Tian and Jianghong Gong
Y. L. Jiang et al., "Preparation and Photocatalysis of Sulfur-Doped Nano-TiO2/Ti Film", Advanced Materials Research, Vol. 177, pp. 281-283, 2011