Photodegradation based on ZnIn2S4/ZnTiO3 heterojunction for the removal of tetracycline and nitenpyram from wastewater

IF 4.2 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials Pub Date : 2025-07-15 DOI:10.1016/j.optmat.2025.117326

Qian Yang, Jing shi, Jiaqi Wei, Shaoye Li, Yangqing He

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引用次数: 0

Abstract

Background

Despite the numerous reports on the application of perovskite oxide ZnTiO₃ in photodegradation, literature specifically addressing the degradation of tetracycline (TC) remains sparse. Furthermore, there is significant variability in the reported photodegradation rates across different studies. Therefore, it is meaningful to re-evaluate and enhance the efficacy of ZnTiO₃ for the photodegradation of TC.

Motivation

ZnTiO₃ and ZnIn₂S₄ are both n-type semiconductor materials. The valence band (VB) and conduction band (CB) levels of ZnIn₂S₄ are 1.64 V and −0.68 V, respectively, which align well with ZnTiO₃. So our objective is to construct a ZnIn₂S₄/ZnTiO₃ heterojunction to synergistically enhance the photocatalytic activity of ZnTiO₃ through improved charge separation.

Methods

In this study, ZnIn₂S₄/ZnTiO₃ were synthesized via a hydrothermal method using ZnTiO₃, ZnCl₂, InCl₃·4H₂O and Thioacetamide as raw materials, and subjected to a water bath reaction at 80 °C for 2 h. The structure and morphology were analyzed through XRD, SEM, XPS and other characterization techniques.

Results and conclusions

The optimum 25 % ZnIn₂S₄/ZnTiO₃ catalyst demonstrates superior photocatalytic degradation towards TC and nitenpyram, achieving removal rates of 82 % and 67 % within 210 min, significantly surpassing the efficiency of pure ZnTiO₃. Free radical scavenging experiments indicate that the order of active species contributing to the photodegradation of TC and nitenpyram is ·O₂⁻ > h⁺ > ·OH. These findings highlight the potential application of ZnIn₂S₄/ZnTiO₃ in the photocatalytic degradation of specific antibiotics and pesticides in wastewater.

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ZnIn2S4/ZnTiO3异质结光降解废水中四环素和硝基吡喃的研究

尽管有许多关于钙钛矿氧化物ZnTiO3在光降解中的应用的报道，但专门针对四环素（TC）降解的文献仍然很少。此外，不同研究报告的光降解率存在显著差异。因此，重新评价和提高ZnTiO3光降解TC的效果具有重要意义。zntio3和ZnIn2S4都是n型半导体材料。ZnIn2S4的价带能级（VB）和导带能级（CB）分别为1.64 V和- 0.68 V，与ZnTiO3排列良好。因此，我们的目标是构建一个ZnIn2S4/ZnTiO3异质结，通过改善电荷分离来协同增强ZnTiO3的光催化活性。方法本研究以ZnTiO3、ZnCl2、InCl3·4H2O和硫乙酰胺为原料，采用水热法合成ZnIn2S4/ZnTiO3，在80℃下进行水浴反应2 h，通过XRD、SEM、XPS等表征技术对其结构和形貌进行分析。结果与结论25% ZnIn2S4/ZnTiO3催化剂对TC和nitenpyram具有良好的光催化降解效果，在210 min内去除率分别为82%和67%，明显优于纯ZnTiO3。自由基清除实验表明，参与TC和nitenpyram光降解的活性物质的顺序为：·O2−>；h +比;·哦。这些发现突出了ZnIn2S4/ZnTiO3在光催化降解废水中特定抗生素和农药方面的潜在应用。

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来源期刊

Optical Materials 工程技术-材料科学：综合

CiteScore

6.60

自引率

12.80%

发文量

1265

审稿时长

38 days

期刊介绍： Optical Materials has an open access mirror journal Optical Materials: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. The purpose of Optical Materials is to provide a means of communication and technology transfer between researchers who are interested in materials for potential device applications. The journal publishes original papers and review articles on the design, synthesis, characterisation and applications of optical materials. OPTICAL MATERIALS focuses on: • Optical Properties of Material Systems; • The Materials Aspects of Optical Phenomena; • The Materials Aspects of Devices and Applications. Authors can submit separate research elements describing their data to Data in Brief and methods to Methods X.