{"title":"Cauliflower-like CuO-ZnO modified glassy carbon electrode as an electrochemical platform for the detection of hydrogen peroxide in adulterated milk","authors":"Haiyan Song, Haobin Hu, Zhijun Li, Yun Wu, Chunxiao He, Yuanyuan Gao, Nana Hou, Qiqi He, Zhenyu Cheng","doi":"10.1007/s00604-025-07130-z","DOIUrl":null,"url":null,"abstract":"<div><p>The detection of hydrogen peroxide (H₂O₂) is a crucial process in various industries, including food safety. In this study, a cauliflower-like CuO-ZnO composite with p–n junction was successfully synthesized using a straightforward one-pot hydrothermal method. The resulting material demonstrates outstanding electrocatalytic performance for H₂O₂ detection, outperforming the individual components. The electrochemical sensor constructed from the cauliflower-like CuO-ZnO composite exhibits a well-defined linear response in the concentration range 0.0005 to 0.105 mmol·L⁻<sup>1</sup> for H₂O₂. The sensor’s limit of detection (LOD) is 0.21 µmol·L⁻<sup>1</sup> at a signal-to-noise ratio (S/N) of 3, with a sensitivity of 1582.7 µA·(mmol·L⁻<sup>1</sup>)⁻<sup>1</sup>·cm⁻<sup>2</sup>. Furthermore, the sensor has been successfully applied to detect trace amounts of H₂O₂ in milk samples, showcasing its potential for sensitive electrochemical sensing applications.</p><h3>Graphical Abstract</h3>\n<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":705,"journal":{"name":"Microchimica Acta","volume":"192 4","pages":""},"PeriodicalIF":5.3000,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Microchimica Acta","FirstCategoryId":"92","ListUrlMain":"https://link.springer.com/article/10.1007/s00604-025-07130-z","RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, ANALYTICAL","Score":null,"Total":0}
引用次数: 0
Abstract
The detection of hydrogen peroxide (H₂O₂) is a crucial process in various industries, including food safety. In this study, a cauliflower-like CuO-ZnO composite with p–n junction was successfully synthesized using a straightforward one-pot hydrothermal method. The resulting material demonstrates outstanding electrocatalytic performance for H₂O₂ detection, outperforming the individual components. The electrochemical sensor constructed from the cauliflower-like CuO-ZnO composite exhibits a well-defined linear response in the concentration range 0.0005 to 0.105 mmol·L⁻1 for H₂O₂. The sensor’s limit of detection (LOD) is 0.21 µmol·L⁻1 at a signal-to-noise ratio (S/N) of 3, with a sensitivity of 1582.7 µA·(mmol·L⁻1)⁻1·cm⁻2. Furthermore, the sensor has been successfully applied to detect trace amounts of H₂O₂ in milk samples, showcasing its potential for sensitive electrochemical sensing applications.
期刊介绍：
As a peer-reviewed journal for analytical sciences and technologies on the micro- and nanoscale, Microchimica Acta has established itself as a premier forum for truly novel approaches in chemical and biochemical analysis. Coverage includes methods and devices that provide expedient solutions to the most contemporary demands in this area. Examples are point-of-care technologies, wearable (bio)sensors, in-vivo-monitoring, micro/nanomotors and materials based on synthetic biology as well as biomedical imaging and targeting.
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