Citation: LIN Xue, GUAN Qing-Feng, ZOU Chun-Jie, LIU Ting-Ting, ZHANG Yao, LIU Chun-Bo, ZHAI Hong-Ju. Hydrothermal Synthesis and Visible Light Photocatalytic Property of Bi3.25Sm0.75Ti3O12 Nanowires[J]. Chinese Journal of Inorganic Chemistry, ;2013, 29(3): 605-612. doi: 10.3969/j.issn.1001-4861.2013.00.102
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Bi3.25Sm0.75Ti3O12 (BSmT) nanowires of 40 nm in diameter were synthesized through a one-step hydrothermal process. The BSmT nanowires are of layered perovskites. The results of UV-Visible diffuse reflectance spectra (DRS) demonstrate that the band gap of BSmT nanowires is about 2.67 eV. The BSmT nanowires exhibit higher photocatalytic activity than that of the traditional N doped TiO2 (N-TiO2) and pure bismuth titanate (Bi4Ti3O12, BIT). 92.0% methyl orange (MO) (0.01 mmol·L-1) is decolorized after visible light irradiation for 360 min. The high photocatalytic performance of BSmT photocatalyst could be attributed to the strong visible light absorption and the recombination restraint of the e-/h+ pairs resulting from doping of Sm3+ ions. In addition, after 4 recycles, there is no significant decrease in the photocatalytic activity, indicating that BSmT is a stable photocatalyst for degradation of MO under visible light irradiation.
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