The S-Scheme ZnO/MoS2 heterostructure preparation and degradation performance of tetracycline hydrochloride

Abstract

Abstract: The wide range and large dosage of antibiotic drugs led to a large amount of antibiotic wastewater entering water body or remaining in soil environment, which posed a threat to human health. However, the removal effect of antibiotics by traditional processes was not ideal. In this study, S-Scheme ZnO/MoS₂ heterojunction composite was prepared by doping MoS₂ with ZnO as the substrate, and the purification performance of the material on antibiotic wastewater was explored. The purification effect of ZnO/MoS₂ composite material on tetracycline hydrochloride (TC) wastewater with different concentrations was investigated by adjusting the ZnO content, illumination conditions and tetracycline hydrochloride concentration in the composite material. The results showed that the degradation efficiency of 60 mg·L^－1 tetracycline wastewater is 88% (pH= 7 105 min) when the catalyst composite ratio of ZnO/MoS₂ composite material is 1∶1 under light condition.The study of the mechanism of electron transport and pollutant degradation showed that electrons migrate from ZnO conduction band to MoS₂ valence band to form S-scheme heterojunction, which effectively improves the catalytic efficiency and pollutant degradation performance.

Key words: ZnO, MoS₂, S-scheme heterojunction, tetracycline hydrochloride, wastewater purification

CLC Number:

TB33

HU Huai-sheng, ZHANG Peng-hui. The S-Scheme ZnO/MoS₂ heterostructure preparation and degradation performance of tetracycline hydrochloride[J]. Journal of Lanzhou University of Technology, 2022, 48(6): 28-33.

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The S-Scheme ZnO/MoS₂ heterostructure preparation and degradation performance of tetracycline hydrochloride

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