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Photocatalytic Properties Research of Schorl/TiO_2/Rare Earth Ions(Nd~(3+),Gd~(3+)) Composite Photocatalysts

Du Yue Li Yan Liu Yangai Fang Minghao Huang Zhaohui(School of Materials Science and Engineering,China University of Geosciences(Beijing),Beijing 100083)  
In this paper,the effect of composite materials prepared by sol-gel method was studied by the photodegradation of methyl orange experiments.This research discussed the impact of the doping amount of schorl,rare-earth ions(Nd3+,Gd3+) and the concentration of methyl orange on the degradation rate,and analyzed the mechanism of schorl and rare-earth ion on photocatalytic reaction.The results indicated that photocatalytic efficiency could improve significantly by adding schorl and rare-earth element.And the highest degradation rate of composite materials could improve by approximately 26% than pure TiO2.The optimal doping amount of Nd3+,Gd3+,schorl were 0.15%,0.10%,1.5%,respectively.
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