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Preparation, characterization and photocatalytic activity of polycrystalline Bi2O3/SrTiO3 composite powders |
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| Authors: | Haitao Zhang Shuxin Ouyang Zhaosheng Li Lifei Liu Tao Yu Jinhua Ye Zhigang Zou |
| Institution: | a Department of Physics, Eco-Materials and Renewable Energy Research Center (ERERC), Nanjing University, Nanjing 210093, PR China b Department of Materials Science and Engineering, Nanjing University, Hankou Road, Nanjing, Jiangsu 210093, PR China c National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, PR China d Ecomaterials Center, National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan |
| Abstract: | Bi2O3/SrTiO3 composite 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/SrTiO3 composite powders exhibited higher photocatalytic activity than pure SrTiO3, Bi2O3 and TiO2 (P25) under visible light irradiation (λ>440 nm). The effects of the Bi2O3 contents on the photocatalytic activities of the composite powders were examined, the photocatalytic activities increased with the content of Bi2O3 increasing 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. |
| Keywords: | A Semiconductors |
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