Modified stannous sulfide nanoparticles with metal-organic framework: Toward efficient and enhanced photocatalytic reduction of chromium (VI) under visible light

Qi Xia; Binbin Huang; Xingzhong Yuan; Hui Wang; Zhibin Wu; Longbo Jiang; Ting Xiong; Jin Zhang; Guangming Zeng; Hou Wang

doi:10.1016/j.jcis.2018.05.015

Modified stannous sulfide nanoparticles with metal-organic framework: Toward efficient and enhanced photocatalytic reduction of chromium (VI) under visible light

J Colloid Interface Sci. 2018 Nov 15:530:481-492. doi: 10.1016/j.jcis.2018.05.015. Epub 2018 May 9.

Authors

Qi Xia¹, Binbin Huang², Xingzhong Yuan³, Hui Wang¹, Zhibin Wu¹, Longbo Jiang¹, Ting Xiong¹, Jin Zhang¹, Guangming Zeng¹, Hou Wang⁴

Affiliations

¹ College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environment Biology and Pollution Control, Hunan University, Ministry of Education, Changsha 410082, PR China.
² College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environment Biology and Pollution Control, Hunan University, Ministry of Education, Changsha 410082, PR China. Electronic address: binbinhuang@hnu.edu.cn.
³ College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environment Biology and Pollution Control, Hunan University, Ministry of Education, Changsha 410082, PR China. Electronic address: yxz@hnu.edu.cn.
⁴ College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environment Biology and Pollution Control, Hunan University, Ministry of Education, Changsha 410082, PR China; School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore 637459, Singapore. Electronic address: huankewanghou024@163.com.

PMID: 29990784
DOI: 10.1016/j.jcis.2018.05.015

Abstract

Novel metal-organic framework/stannous sulfide (MIL-53(Fe)/SnS) nanocomposite photocatalysts were successfully synthesized by a one-step deposition process. The structure, composition and optical properties of the MIL-53(Fe)/SnS composite were systematically characterized by the X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, transmission electron microscopy, Fourier transform-infrared spectroscopy, UV-vis diffuse reflection spectroscopy and photoluminescence analysis. The photocatalytic performance of MIL-53(Fe)/SnS composite has been evaluated in the reduction of chromium (VI) under visible-light irradiation. Compared with pure MIL-53(Fe) and SnS, the MIL-53(Fe)/SnS composite exhibited enhanced photoreduction capability of chromium (VI) due to the strengthened absorption in the visible region, higher electron-hole separation rate and larger specific area. The MIL-53(Fe)/SnS composite with MIL-53(Fe) adding of 15 mg displayed optimal chromium (VI) reduction rate of 0.01878 min^-1, which was about 7.5 and 5.2 times than pure MIL-53(Fe) and SnS, respectively. The active species superoxide radical (O₂^-), electron(e^-) and hole(h⁺) are essential toward chromium (VI) reduction. Lastly, a possible photocatalytic mechanism is proposed.

Keywords: Chromium (VI); MIL-53(Fe); Photocatalysis; SnS; Visible light irradiation.