XPS and Raman study of the active-sites on molybdenum disulfide nanopetals for photocatalytic removal of rhodamine B and doxycycline hydrochlride

Xuefeng Ai; Hougang Fan; Yijun Wang; Yumeng Guo; Xiaoyan Liu; Lili Yang; Huilian Liu; Jinghai Yang

doi:10.1039/c8ra08027e

XPS and Raman study of the active-sites on molybdenum disulfide nanopetals for photocatalytic removal of rhodamine B and doxycycline hydrochlride

RSC Adv. 2018 Oct 25;8(63):36280-36285. doi: 10.1039/c8ra08027e. eCollection 2018 Oct 22.

Authors

Xuefeng Ai^{1

2}, Hougang Fan^{1

2

3}, Yijun Wang², Yumeng Guo², Xiaoyan Liu^{1

2}, Lili Yang^{1

2

3}, Huilian Liu^{1

2

3}, Jinghai Yang^{1

2

3}

Affiliations

¹ Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University Changchun 130103 PR China fanhougang@jlnu.edu.cn jhyang1@jlnu.edu.cn.
² College of Physics, Jilin Normal University Siping 136000 PR China.
³ National Demonstration Center for Experimental Physics Education, Jilin Normal University Siping 136000 PR China.

Abstract

Molybdenum disulfide (MoS₂) nanopetals were successfully synthesized by hydrothermal method (sample without sintering) and then sintered at different temperature (sintered samples). The products were characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), nitrogen (N₂) adsorption analyses for Brunauer-Emmett-Teller (BET) specific surface area measurements, X-ray photoelectron spectrum (XPS) and Raman spectrum. XRD pattern indicated that the samples can be indexed to hexagonal phase 2H-MoS₂. SEM and TEM images showed that the sintered MoS₂ nanopetals had sizes ranging from 150 to 300 nm with almost the same morphology. The pore structure and surface area were nearly the same for the three sintered MoS₂ nanopetals. Interestingly, XPS and Raman spectra implied that there was a few 1T-phase in the MoS₂ nanopetals which enhanced the photocatalytic performance greatly when sintered at low temperature.