A Study On The Preparation Of Fe\Zn Doped Nanometer TiO2 Photocatalyst Coated On Activited Carbon And Its Photocatalystic Property

In recent years,semiconductor photocatalysts have evoked tremendous interest in the light-stimulated degradation of aqueous pollutants and atomospheric pollutants along with the entironmental deterioration. Titanium doxide (TiO₂) photocatalyst has been the focus of the investigations, because of its outstanding property. It has great practical value to improve the photocatalytic performance of Titania and apply it to entironmental protection.In this paper,preparation Fe\Zn doped TiO₂ coated on granular activated carbon by the particle sol-gel method,which were based on the predecessor's stadies, was investigated. The effect of different heat treatment temperatures on phase constitution, phase transformation, crystalline sizes and photocatalysis performance has been studied using XRD, BET, and UV-Vis spectrophotometer.The results showed that, photocatalyst coated on granular activated carbon can be preparation by the sol-gel method and its photocatalytic performance is affected by accelerant additive, coating time, and heat treatment temperature The Fe\Zn doped TiO₂ coated on granular activated carbon heat treated at 500℃ demonstrated the highest photocatalytic performance:methyl orange solution was 97.3% decomposed in 2 hours, comparing to that only 41% decomposed without activated carbon carrier. The using of activated carbon carrier can improve the photocatalytic performance of titania.