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《Micronanoelectronic Technology》 2008-04
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Microwave Synthesis and Photocatalytic Activity of Bi_2O_3/TiO_2 Nanocomposite

Liao Xuehong,Wang Xiaojia (Department of Chemistry,Huanggang Normal University,Huanggang 438000,China)  
Bismuth doped TiO2 nanocomposite was prepared by bismuth nitrate and titanium sulfate as materials by hydroiysis synthesis method under microwave irradiation. The samples were characterized by X-ray diffraction (XRD) and transmission electron micrograph (TEM). The results show that the as-prepared Bi3+-doped TiO2 nanocomposite of inventory molar ratio of 1∶10 calcined at 500 ℃ is anatase with crystalline diameter of 6-10 nm. The photocatalytic activity of the as-prepared Bi3+-doped TiO2 nanocomposite by using degradation of methyl orange was researched. The result indicates that the as-prepared Bi3+-doped TiO2 nanocomposite is a good photo-catalyst. The effects of photo-catalytic activities of the composite with different ratios of qualities of inventory molar ratio, calcined at different temperature, different amount of nanocomposite were investigated . When the concentration of catalyst loading is 1 g/L, the degradation rate of TiO2 reaches 97% for 2 mg/L concentration of methyl orange under ultraviolet irradiation after 30 min. The photocatalytic degradation of methyl orange meets first order kinetics equation.
【Fund】: 湖北省教育厅重点基金资助(D200627001)
【CateGory Index】: O643.3
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