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《Journal of Guilin University of Electronic Technology》 2012-01
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Study of the DTB composite catalyst photocatalytic degradation for alizarin red and basic fuchsin

Wang Yanghe,Xia Jinhong,Wei Wei,Huang Guoyin(School of Life and Environmental Sciences,Guilin University of Electronic Technology,Guilin 541004,China)  
To degrade alizarin red and basic fuchsin in light conditions,the Dy-TiO2-bentonite(DTB)composite catalyst were prepared by bentonite as a carrier are four n-butyl titanate and dysprosium salt as raw material,the use of sol-gel method of dysprosium doped.The catalyst photocatalytic's structure and morphology were characterization by XRD and SEM,the results showed the catalyst photocatalytic has an huge specific surface and the anatase TiO2 crystalline characteristics peaks was clearly existence.The crystal face spacing of DTB's bentonite obviously increased 0.196 nm,from 1.691 nm to 1.887 nm.The influence of catalyst photocatalytic dosage,initial dye concentration,illumination time,pH value and other factors on decolorization rate,of alizarin red and basic fuchsin were studied.The degradation mechanism and kinetic equation of catalyst photocatalytic were studied at the same time.The data shows that under the conditions of DBT 0.1 g,illumination time 45min and pH=7,the degradation amount of alizarin red and basic fuchsin was 18.0 mg/g,19.5 mg/g.while under the same condition,use the Solar light,the degradation amount of alizarin red and basic fuchsin reached 20 mg/g or more.After the catalyst photocatalytic has been used twice,the removal rate of alizarin red and basic fuchsin was still reached 80% or more.The DTB degradation of the dynamic behavior of alizarin red and basic fuchsin line with second-order rate kinetic adsorption model.
【Fund】: 桂林电子科技大学大学生创新性实验项目(2008C043)
【CateGory Index】: X703
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