MoS2 nanosheets anchored on porous ZnSnO3 cubes as an efficient visible-light-driven composite photocatalyst for the degradation of tetracycline and mechanism insight

[Display omitted] •MS-ZSO composite was prepared by a simple hydrothermal route.•The MS-ZSO composites showed outstanding visible-light photocatalytic activity for degradation of TC.•The possible photodegradation pathways of TC over MS-ZSO was proposed based on the intermediates detected by LC–MS. I...

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Bibliographic Details
Published inJournal of hazardous materials Vol. 390; p. 122158
Main Authors Guo, Feng, Huang, Xiliu, Chen, Zhihao, Ren, Hongji, Li, Mingyang, Chen, Lizhuang
Format Journal Article
LanguageEnglish
Published Elsevier B.V 15.05.2020
Subjects
Composite photocatalyst
MoS2
Tetracycline degradation
Visible light
ZnSnO3
Tetracycline degradation
Visible light
ZnSnO3
MoS2
Composite photocatalyst
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Summary:[Display omitted] •MS-ZSO composite was prepared by a simple hydrothermal route.•The MS-ZSO composites showed outstanding visible-light photocatalytic activity for degradation of TC.•The possible photodegradation pathways of TC over MS-ZSO was proposed based on the intermediates detected by LC–MS. In this study, MoS2/ZnSnO3 (MS-ZSO) composite photocatalyst with loading MS nanosheets onto the surface of porous ZSO microcubes was synthesized using a simple hydrothermal route. The prepared MS-ZSO composite can be easily excited under visible light, and 3 % MS-ZSO exhibits an outstanding photo-degradation (>80 % in 60 min) and mineralization performance (>42 % in 60 min) of the tetracycline. A remarkable improvement in the photocatalytic activity of MS-ZSO composite derived from a positive synergistic effect of well-matched energy level positions, increasement the absorption of visible light, prolonged life time decay and improved interfacial charge transfer between MS and ZSO. In-depth investigation on charge carrier separation mechanism toward MS/ZSO composite under visible light was proposed, which was further evidenced by capture experiments and electron spin resonance (ESR) techniques. Furthermore, the corresponding intermediates of tetracycline degradation over MS-ZSO composites were inspected by liquid chromatography-mass spectrometry (LC–MS) analysis, and the possible degradation paths were proposed.
ISSN:0304-3894
1873-3336
DOI:10.1016/j.jhazmat.2020.122158