Preparation, characterization and photocatalytic activity of polycrystalline Bi2O3/SrTiO3 composite powders
Preparation, characterization and photocatalytic activity of polycrystalline Bi2O3/SrTiO3 composite powders
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DOI：
10.1016/j.jpcs.2006.07.005
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发表时间：
2006-12
影响因子：
4
通讯作者：
Haitao Zhang;S. Ouyang;Zhaosheng Li;Lifei Liu;Tao Yu;Jinhua Ye;Z. Zou
中科院分区：
文献类型：
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作者：
Haitao Zhang;S. Ouyang;Zhaosheng Li;Lifei Liu;Tao Yu;Jinhua Ye;Z. Zou
制备了Bi 2 O3/SrTiO 3复合粉体，并以甲醇为光催化剂，研究了其光催化活性。采用紫外-可见漫反射光谱、扫描电镜和X射线衍射对粉体进行了表征。结果表明，在可见光照射下（λ> 440 nm），Bi 2 O3/SrTiO 3复合粉体的光催化活性均高于纯SrTiO 3、Bi 2 O3和TiO 2（P25）。考察了Bi 2 O3含量对复合粉体光催化活性的影响，在可见光照射下，复合粉体的光催化活性随Bi 2 O3含量的增加而增加，当Bi 2 O3含量达到83%时，复合粉体的光催化活性逐渐降低。考察了煅烧温度对复合粉体光催化活性的影响。
Bi2O3/SrTiO3composite powders have been prepared and their photocatalytic activities were investigated by photooxidation of methanol. These powders were characterized by UV–Visible diffuse reflectance spectra, SEM and X-ray diffraction (XRD). The results revealed that all the Bi2O3/SrTiO3composite powders exhibited higher photocatalytic activity than pure SrTiO3, Bi2O3and TiO2(P25) under visible light irradiation (λ>440nm). The effects of the Bi2O3contents on the photocatalytic activities of the composite powders were examined, the photocatalytic activities increased with the content of Bi2O3increasing to a maximum of 83% and then decreased under visible light irradiation. The effects of the calcination temperatures on the photocatalytic activities of the composite powders were also investigated.