Engineering Z-Scheme Bi2S3/CeO2/Ni(OH)2 Heterojunctions for Enhanced Visible-Light Photocatalytic Degradation of Tetracycline Hydrochloride

IF 2.3 4区化学 Q3 CHEMISTRY, PHYSICAL

Catalysis Letters Pub Date : 2025-04-14 DOI:10.1007/s10562-025-05003-x

Xinyin Hu, Guoqing Xiao, Chunlin Chen, Chunyan Chen, Xiang Zeng, Ruili Li, Zhengwei Yang

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Abstract

Recently, several emerging pollutants have caused increasing damage to aquatic ecosystems. Reducing antibiotic concentrations in water by visible light is one of the most promising strategies for sustainable development. Here, a Bi₂S₃/CeO₂/Ni(OH)₂ Z-scheme heterojunction photocatalyst was prepared by the hydrothermal method, which could effectively utilize free radicals to degrade tetracycline. Ni(OH)₂ was used for co-catalysing in photodegradation experiments to improve electron transfer and enhance photocatalytic performance. The degradation rate of the Z-scheme heterojunction photocatalyst for 20 mg/L TC was 91.35% after reacting 60 min under visible light irradiation. Besides, it also investigated such operational parameters influencing the photocatalytic reaction as catalyst dosage, initial concentration of tetracycline hydrochloride (TC), and solution pH. Studies using free radical scavenging experiments and electron spin resonance (ESR) measurements demonstrated that hydroxyl radicals (·OH) and superoxide radicals (·O₂⁻) both contributed to the photodegradation of TC. Finally, with high-performance liquid chromatography-mass spectrometry (LC-MS), potential degradation pathways of the intermediate products were logically inferred as well as the photocatalytic mechanism. The experimental results surface that the prepared Z-scheme heterojunction photocatalyst Bi₂S₃/CeO₂/Ni(OH)₂ exhibits superior photocatalytic performance, offering a novel approach to addressing TC contamination in environmental settings.

Graphical Abstract

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工程z方案Bi2S3/CeO2/Ni(OH)2异质结增强可见光光催化降解盐酸四环素

近年来，一些新出现的污染物对水生生态系统造成了越来越大的破坏。利用可见光降低水中抗生素浓度是可持续发展最有前途的战略之一。本文采用水热法制备了Bi2S3/CeO2/Ni(OH)2 z型异质结光催化剂，该催化剂能有效地利用自由基降解四环素。在光降解实验中，利用Ni(OH)2进行共催化，改善电子传递，提高光催化性能。在可见光照射下反应60 min后，z型异质结光催化剂对20 mg/L TC的降解率为91.35%。此外，还考察了催化剂用量、盐酸四环素（TC）初始浓度、溶液ph等操作参数对光催化反应的影响。通过自由基清除实验和电子自旋共振（ESR）测量表明，羟基自由基（·OH）和超氧自由基（·O2−）都有助于TC的光降解。最后，利用高效液相色谱-质谱（LC-MS）技术，从逻辑上推断了中间产物的潜在降解途径以及光催化机理。实验结果表明，制备的z型异质结光催化剂Bi2S3/CeO2/Ni(OH)2具有优异的光催化性能，为解决环境中TC污染提供了一种新的途径。图形抽象

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来源期刊

Catalysis Letters 化学-物理化学

CiteScore

5.70

自引率

3.60%

发文量

327

审稿时长

1 months

期刊介绍： Catalysis Letters aim is the rapid publication of outstanding and high-impact original research articles in catalysis. The scope of the journal covers a broad range of topics in all fields of both applied and theoretical catalysis, including heterogeneous, homogeneous and biocatalysis. The high-quality original research articles published in Catalysis Letters are subject to rigorous peer review. Accepted papers are published online first and subsequently in print issues. All contributions must include a graphical abstract. Manuscripts should be written in English and the responsibility lies with the authors to ensure that they are grammatically and linguistically correct. Authors for whom English is not the working language are encouraged to consider using a professional language-editing service before submitting their manuscripts.