Hydrothermal synthesis of Sm-doped Bi2MoO6 and its high photocatalytic performance for the degradation of Rhodamine B

作者：Wang, Min^*; You, Meiyan; Guo, Pengyao; Tang, Hongyang; Lv, Chunmei; Zhang, Yu; Zhu, Tong; Han, Jin

来源：Journal of Alloys and Compounds, 2017, 728: 739-746.

DOI：10.1016/j.jallcom.2017.09.066

• Bi2MoO6
• Sm-doped
• Hydrothermal method
• Rhodamine B
• Visible-light photoactivity

Serials Sm doped Bi2MoO6 photocatalyts with different Sm contents (xSm-Bi2MoO6, x% = 0.0%, 0.4%, 0.6%, 0.8%, 1.0%, 1.2%) were prepared via hydrothermal method to improve the photocatalytic performance of pure Bi2MoO6. The samples are characterized by XRD, XPS, SEM, TEM, HRTEM, and PL techniques. It indicates that Sm3+ ions were successfully doped into Bi2MoO6, and the band gap value was gradually decreased with Sm dopant concentration increasing. The photocatalytic activity of Sm-doped Bi2MoO6 photocatalyst was significantly affected by the Sm doping content. Compared to pure Bi2MoO6, the Sm-doped Bi2MoO6 samples exhibited much higher photocatalytic activity and 0.8% Sm-doped Bi2MoO6 shows the highest RhB photodegradation rate, being 89% in 50 min under visible light irradiation. The improved photocatalytic activity of Sm-doped Bi2MoO6 could be attributed to the enhanced visible light absorption, narrower band gaps and higher separation rate of electron-hole pairs derived from Sm trapping photogenerated electrons. But the phase structure, special surface areas and morphology have little effects on the higher photocatalytic activity of Sm-doped Bi2MoO6.

• 出版日期2017-12-25
• 单位沈阳理工大学; 东北大学