Hydrothermal Synthesis and Visible Light Photocatalytic Property of Bi3.25Sm0.75Ti3O12 Nanowires

作者：Lin Xue^*; Guan Qing-Feng; Zou Chun-Jie; Liu Ting-Ting; Zhang Yao; Liu Chun-Bo; Zhai Hong-Ju

来源：Chinese Journal of Inorganic Chemistry, 2013, 29(3): 605-612.

DOI：10.3969/j.issn.1001-4861.2013.00.102

• bismuth titanate
• samarium doping
• nanowires
• hydrothermal synthesis
• photocatalytic degradation
• visible light irradiation

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.

• 出版日期2013-3-10
• 单位吉林师范大学; 江苏大学