Preparation and Properties of Composite TiO2-HZSM-5 Used for Photocatalytic Degradation of Methyl Orange
Photocatalytic activities of TiO2-HZSM-5 composite photocatalysts prepared by solid-state dispersion method were investigated. TiO2 particles were well distributed on the surface of HZSM-5. Methyl orange removal rates increased with decreasing TiO2:HZSM-5 ratio from 10:1 to 1:50 in TiO2-HZSM-5 composites. Adsorption of methyl orange increased constantly with increasing amount of HZSM-5. Photocatalytic degradation activity was also noticeably enhanced up to 56% when using TiO2-HZSM-5 composite, resulting in 13% more removal compared with using pure TiO2. Composite photocatalysts calcinated at temperatures from 400 oC to 600 oC exhibited enhanced methyl orange removal abilities, and the optimum calcination temperature was 450 oC. After 70 min of irradiation, methyl orange removal rates were 99.1% and 86.5% when TiO2 concentrations of TiO2-HZSM-5 composite were 40 mg/l and 20 mg/l, respectively.
Zhenyu Du and Bin Liu
W. J. Zhang and Y. Yu, "Preparation and Properties of Composite TiO2-HZSM-5 Used for Photocatalytic Degradation of Methyl Orange", Applied Mechanics and Materials, Vols. 26-28, pp. 281-284, 2010