实验技术与管理2026，Vol.43Issue(5)：98-104,7.DOI:10.16791/j.cnki.sjg.2026.05.013
钒酸铋/氧化铜异质结的可控构筑及其光催化降解四环素性能研究
Construction and photocatalytic tetracycline degradation performance of a bismuth vanadate-copper oxide heterojunction
摘要
Abstract
[Objective]To address the high carrier recombination rate and low degradation efficiency of traditional single-component photocatalysts,this study aims to construct efficient bismuth vanadate-copper oxide(BiVO4-CuO)heterojunction photocatalysts and investigate their performance in tetracycline degradation.[Methods]BiVO4-CuO heterojunction photocatalysts with different component ratios were prepared via a hydrothermal method and characterized using various analytical techniques to analyze their structural properties.The photocatalytic performance was evaluated using tetracycline as the target pollutant under visible light irradiation(λ>420 nm).The degradation mechanism was elucidated through kinetic analysis,active species trapping experiments,and electrochemical measurements.The effects of reaction temperature,pH,catalyst dosage,and initial tetracycline concentration on degradation efficiency were systematically investigated.[Results]The experimental results showed that 1)X-ray diffraction and high-resolution transmission electron microscopy confirmed the successful construction of a heterojunction structure with intimate contact between BiVO4(121)and CuO(-111)facets;2)under optimal conditions(catalyst dosage of 0.5 g/L;tetracycline concentration of 20 mg/L;pH 7.0),the BC-1 sample achieved an apparent rate constant of 0.021 6 min-1,with 90.3%degradation and 85.6%mineralization rates within 120 min;3)Mott-Schottky and X-ray photoelectron spectroscopy analyses verified the formation of a Z-scheme band structure favorable for carrier migration,extending the carrier lifetime to 15.6 ns;4)electron spin resonance and electrochemical tests revealed·O2-and·OH as the primary active species,achieving degradation through C—N and amide bond cleavage;5)after five cycles,the catalyst maintained 91.8%of its initial activity.[Conclusions]Through facet control and interface engineering,an efficient BiVO4-CuO heterojunction photocatalyst was successfully constructed.The Z-scheme band structure significantly enhanced the separation efficiency of photogenerated carriers,achieving effective degradation and mineralization of tetracycline.This work provides valuable insights for the development of high-performance composite photocatalytic materials.关键词
BiVO4/CuO异质结/晶面调控/界面电荷转移/光催化降解/反应动力学/活性物种Key words
BiVO4/CuO heterojunction/facet control/interfacial charge transfer/photocatalytic degradation/reaction kinetics/active species分类
化学化工引用本文复制引用
党铭铭..钒酸铋/氧化铜异质结的可控构筑及其光催化降解四环素性能研究[J].实验技术与管理,2026,43(5):98-104,7.基金项目
2024年度湖南省自然科学基金项目(2024JJ8069) （2024JJ8069）
2024年度湖南省教育厅科学研究优秀青年项目(24B1108) （24B1108）
2022年度湖南省普通高校青年骨干教师培养项目(湘教通[2022]287号) （湘教通[2022]287号）
