Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 390, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jhazmat.2020.122158
Keywords
MoS2; ZnSnO3; Composite photocatalyst; Tetracycline degradation; Visible light
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Funding
- National Natural Science Foundation of China [21906072, 21671084]
- Natural Science Foundation of Jiangsu Province [BK20190982]
- Jiangsu 333 talents project [BRA2018342]
- Jiangsu provincial government scholarship for overseas studies
- Doctoral Scientific Research Foundation of Jiangsu University of Science and Technology (China) [1142931803]
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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.
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