S-scheme ZnO/MoS2异质结构筑与对盐酸四环素降解性能

兰州理工大学学报 ›› 2022, Vol. 48 ›› Issue (6): 28-33.

S-scheme ZnO/MoS₂异质结构筑与对盐酸四环素降解性能

胡怀生^*, 张鹏会

陇东学院化学化工学院, 甘肃庆阳 745000

收稿日期:2021-12-08 出版日期:2022-12-28 发布日期:2023-03-21
通讯作者: 胡怀生(1978-),男,甘肃环县人,副教授.Email:ldxyhhs@163.com
基金资助:
甘肃省自然科学基金(21JR1RM335)

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

HU Huai-sheng, ZHANG Peng-hui

College of Chemistry & Chemical Engineering, Longdong University, Qingyang 745000

Received:2021-12-08 Online:2022-12-28 Published:2023-03-21

摘要/Abstract

摘要： 抗生素药物使用范围广且用量大,导致大量抗生素废水进入水体或者残留在土壤环境中,对人类健康造成威胁,然而传统工艺对其去除效果并不理想.以ZnO为基底,通过掺杂MoS₂,制备了S-scheme ZnO/MoS₂异质结复合材料,研究了该材料对抗生素废水的净化性能.通过调节复合材料中ZnO含量、光照条件、盐酸四环素浓度等,探讨了ZnO/MoS₂复合材料对不同浓度盐酸四环素(tetracycline hydrochloride,TC)废水的净化效果.结果表明:在光照条件下,催化剂复合比为1∶1的ZnO/MoS₂复合材料对60 mg·L^－1四环素废水的降解效率可达88%(pH=7,105 min);电子传递与污染物降解机理研究表明,电子由ZnO导带迁移至MoS₂价带,形成S-scheme异质结,从而有效提高了催化效率与污染物降解性能.

关键词: ZnO, MoS₂, S-scheme异质结, 盐酸四环素, 废水净化

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

中图分类号:

TB33

胡怀生, 张鹏会. S-scheme ZnO/MoS₂异质结构筑与对盐酸四环素降解性能[J]. 兰州理工大学学报, 2022, 48(6): 28-33.

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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S-scheme ZnO/MoS₂异质结构筑与对盐酸四环素降解性能

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

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[1]	李维学, 高姗姗, 戴剑锋, 索忠强, 王青. Cu/Al共掺ZnO光学性质的第一性原理计算[J]. 兰州理工大学学报, 2021, 47(4): 6-12.
[2]	于富成, 南冬梅, 王博龙, 李圆梦, 刘正艳, 何玲. Ag纳米颗粒修饰对La掺杂ZnO纳米棒光催化性能的影响[J]. 兰州理工大学学报, 2021, 47(1): 28-35.