Preparation, Characterization, and Performance Analysis of S-Doped Bi2MoO6 Nanosheets

Ruiqi Wang; Duanyang Li; Hailong Wang; Chenglun Liu; Longjun Xu

doi:10.3390/nano9091341

Preparation, Characterization, and Performance Analysis of S-Doped Bi₂MoO₆ Nanosheets

Nanomaterials (Basel). 2019 Sep 19;9(9):1341. doi: 10.3390/nano9091341.

Authors

Ruiqi Wang¹, Duanyang Li², Hailong Wang³, Chenglun Liu^{4

5}, Longjun Xu⁶

Affiliations

¹ State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, China. wrq666@cqu.edu.cn.
² College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, China. 20161813101@cqu.edu.cn.
³ State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, China. cqwhl@cqu.edu.cn.
⁴ State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, China. xlclj@cqu.edu.cn.
⁵ College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, China. xlclj@cqu.edu.cn.
⁶ State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, China. xulj@cqu.edu.cn.

Abstract

S-doped Bi₂MoO₆ nanosheets were successfully synthesized by a simple hydrothermal method. The as-prepared samples were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscopy (TEM), N₂ adsorption-desorption isotherms, Raman spectroscopy, Fourier transform infrared spectroscopy (FT-IR), elemental mapping spectroscopy, photoluminescence spectra (PL), X-ray photoelectron spectroscopy (XPS), and UV-visible diffused reflectance spectra (UV-vis DRS). The photo-electrochemical performance of the samples was investigated via an electrochemical workstation. The S-doped Bi₂MoO₆ nanosheets exhibited enhanced photocatalytic activity under visible light irradiation. The photo-degradation rate of Rhodamine B (RhB) by S-doped Bi₂MoO₆ (1 wt%) reached 97% after 60 min, which was higher than that of the pure Bi₂MoO₆ and other S-doped products. The degradation rate of the recovered S-doped Bi₂MoO₆ (1 wt%) was still nearly 90% in the third cycle, indicating an excellent stability of the catalyst. The radical-capture experiments confirmed that superoxide radicals (·O^2-) and holes (h⁺) were the main active substances in the photocatalytic degradation of RhB by S-doped Bi₂MoO₆.

Keywords: Rhodamine B; S-doped Bi2MoO6; characterization; performance; photodegradation rate.

Abstract

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