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《Journal of Functional Materials》 2008-01
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Preparation and photocatalystic activity of the mesoporous Co-doping nanometer TiO_2

SONG Lin-yun,WU Yu-cheng,LI Yun,YE Min,XIE Ting,HUANG Xin-ming,ZHENG Zhi-xiang(School of Materials Science and Engineering,Hefei University of Technology,Hefei 230009,China)  
Cobalt doped mesoporous TiO2 photocatalyst was prepared by hydrolysis precipitation method with Ti(OBu)4 as raw material,HAC as doping agent at room temperature.The morphology and microstructure of the prepared mesoporous Co-TiO2 were characterized by X-ray diffraction(XRD),transmission electronmicroscopy(TEM) and N2 adsorption/desorption isotherm.The structure of the nanocomposites and the relationship between the concentrations of Co and their photocatalystic activity,between heat treatment temperatures and their photocatalystic activity were also studied.The best doping rate and heat treatment temperature were obtained.The results showed that mesoporous titania grain size were in the range of 20-30nm.The mesoporous titania with Co/TiO2 molar ratio of 1.0 shows a narrow distributing pore diameter of 18.5nm,large special surface area of 98.231m2/g and pore volume of 0.285cm3/g.The best heat treatment temperature of the mesoporous Co-TiO2 was 500℃.The optimal concentration of the mesoporous Co-TiO2 was 1.0g/L.Degradation rate of methyl orange was maximal,up to 95%.
【Fund】: 国家自然科学基金资助项目(20571022);; 教育部博士点基金资助项目(20060359011);; 安徽省十五科技攻关资助项目(01402007)
【CateGory Index】: O643.36
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