{"title":"用氧化石墨烯/氧化石墨烯纳米复合材料†快速检测和可见光催化降解水中氯霉素","authors":"Kamalpreet Kaur, Tarab Akhtar, Gagandeep Singh, Navneet Kaur and Narinder Singh","doi":"10.1039/D4NJ05369A","DOIUrl":null,"url":null,"abstract":"<p >Nanoscale materials employed in the electrochemical detection of chloramphenicol (CAP) have attracted significant research attention due to concerns regarding antibiotic residue detection in water and food products, associated with widespread contamination of water reservoirs by human and veterinary waste. Graphene-based materials are especially intriguing because of their π–π interactions. In the present work, <strong>CoAl<small><sub>2</sub></small>O<small><sub>4</sub></small></strong> and reduced graphene oxide (<strong>rGO</strong>) have been used to modify glassy carbon electrodes (<strong>GCEs</strong>). The synthesized <strong>CoAl<small><sub>2</sub></small>O<small><sub>4</sub></small>/rGO</strong> nanocomposite was characterized through various techniques such as XPS, FE-SEM, EDS, Raman spectroscopy, FTIR, and HR-TEM. The electrochemical performance of <strong>CoAl<small><sub>2</sub></small>O<small><sub>4</sub></small>/rGO</strong> for CAP determination was evaluated using cyclic voltammetry (CV), differential pulse voltammetry (DPV), linear sweep voltammetry, and chronoamperometry techniques. The <strong>CoAl<small><sub>2</sub></small>O<small><sub>4</sub></small>/rGO</strong> exhibited linear detection limit = 13.5 nM, limit of quantification = 19.34 nM, and sensitivity = 1.1505 μA μM<small><sup>−1</sup></small> cm<small><sup>−2</sup></small> with a linear calibration equation of <em>I</em><small><sub>pc</sub></small> (μA) = 0.3895[CAP]/(μM) + 0.1599 having <em>R</em><small><sup>2</sup></small> = 0.9957. Additionally, <strong>CoAl<small><sub>2</sub></small>O<small><sub>4</sub></small>/rGO</strong> showed excellent selectivity and anti-interference towards CAP recognition. The <strong>CoAl<small><sub>2</sub></small>O<small><sub>4</sub></small>/rGO</strong> showed promising potential for CAP analysis in tap water, river water, and pharmaceutical wastewater with good % recovery rates. Moreover, the <strong>CoAl<small><sub>2</sub></small>O<small><sub>4</sub></small>/rGO</strong> nanocomposite is an efficient catalyst for the photodegradation of CAP as revealed by the UV-vis spectroscopy results, which showed that the <strong>CoAl<small><sub>2</sub></small>O<small><sub>4</sub></small>/rGO</strong> nanocomposite exhibits 100% CAP degradation efficiency within 80 min under natural sunlight and displays good stability and reusability of the catalyst.</p>","PeriodicalId":95,"journal":{"name":"New Journal of Chemistry","volume":" 11","pages":" 4668-4681"},"PeriodicalIF":2.5000,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Rapid detection and visible light driven photocatalytic degradation of chloramphenicol in aqueous medium using a CoAl2O4/rGO nanocomposite†\",\"authors\":\"Kamalpreet Kaur, Tarab Akhtar, Gagandeep Singh, Navneet Kaur and Narinder Singh\",\"doi\":\"10.1039/D4NJ05369A\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p >Nanoscale materials employed in the electrochemical detection of chloramphenicol (CAP) have attracted significant research attention due to concerns regarding antibiotic residue detection in water and food products, associated with widespread contamination of water reservoirs by human and veterinary waste. Graphene-based materials are especially intriguing because of their π–π interactions. In the present work, <strong>CoAl<small><sub>2</sub></small>O<small><sub>4</sub></small></strong> and reduced graphene oxide (<strong>rGO</strong>) have been used to modify glassy carbon electrodes (<strong>GCEs</strong>). The synthesized <strong>CoAl<small><sub>2</sub></small>O<small><sub>4</sub></small>/rGO</strong> nanocomposite was characterized through various techniques such as XPS, FE-SEM, EDS, Raman spectroscopy, FTIR, and HR-TEM. The electrochemical performance of <strong>CoAl<small><sub>2</sub></small>O<small><sub>4</sub></small>/rGO</strong> for CAP determination was evaluated using cyclic voltammetry (CV), differential pulse voltammetry (DPV), linear sweep voltammetry, and chronoamperometry techniques. The <strong>CoAl<small><sub>2</sub></small>O<small><sub>4</sub></small>/rGO</strong> exhibited linear detection limit = 13.5 nM, limit of quantification = 19.34 nM, and sensitivity = 1.1505 μA μM<small><sup>−1</sup></small> cm<small><sup>−2</sup></small> with a linear calibration equation of <em>I</em><small><sub>pc</sub></small> (μA) = 0.3895[CAP]/(μM) + 0.1599 having <em>R</em><small><sup>2</sup></small> = 0.9957. Additionally, <strong>CoAl<small><sub>2</sub></small>O<small><sub>4</sub></small>/rGO</strong> showed excellent selectivity and anti-interference towards CAP recognition. The <strong>CoAl<small><sub>2</sub></small>O<small><sub>4</sub></small>/rGO</strong> showed promising potential for CAP analysis in tap water, river water, and pharmaceutical wastewater with good % recovery rates. Moreover, the <strong>CoAl<small><sub>2</sub></small>O<small><sub>4</sub></small>/rGO</strong> nanocomposite is an efficient catalyst for the photodegradation of CAP as revealed by the UV-vis spectroscopy results, which showed that the <strong>CoAl<small><sub>2</sub></small>O<small><sub>4</sub></small>/rGO</strong> nanocomposite exhibits 100% CAP degradation efficiency within 80 min under natural sunlight and displays good stability and reusability of the catalyst.</p>\",\"PeriodicalId\":95,\"journal\":{\"name\":\"New Journal of Chemistry\",\"volume\":\" 11\",\"pages\":\" 4668-4681\"},\"PeriodicalIF\":2.5000,\"publicationDate\":\"2025-02-10\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"New Journal of Chemistry\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://pubs.rsc.org/en/content/articlelanding/2025/nj/d4nj05369a\",\"RegionNum\":3,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"CHEMISTRY, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"New Journal of Chemistry","FirstCategoryId":"92","ListUrlMain":"https://pubs.rsc.org/en/content/articlelanding/2025/nj/d4nj05369a","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
Rapid detection and visible light driven photocatalytic degradation of chloramphenicol in aqueous medium using a CoAl2O4/rGO nanocomposite†
Nanoscale materials employed in the electrochemical detection of chloramphenicol (CAP) have attracted significant research attention due to concerns regarding antibiotic residue detection in water and food products, associated with widespread contamination of water reservoirs by human and veterinary waste. Graphene-based materials are especially intriguing because of their π–π interactions. In the present work, CoAl2O4 and reduced graphene oxide (rGO) have been used to modify glassy carbon electrodes (GCEs). The synthesized CoAl2O4/rGO nanocomposite was characterized through various techniques such as XPS, FE-SEM, EDS, Raman spectroscopy, FTIR, and HR-TEM. The electrochemical performance of CoAl2O4/rGO for CAP determination was evaluated using cyclic voltammetry (CV), differential pulse voltammetry (DPV), linear sweep voltammetry, and chronoamperometry techniques. The CoAl2O4/rGO exhibited linear detection limit = 13.5 nM, limit of quantification = 19.34 nM, and sensitivity = 1.1505 μA μM−1 cm−2 with a linear calibration equation of Ipc (μA) = 0.3895[CAP]/(μM) + 0.1599 having R2 = 0.9957. Additionally, CoAl2O4/rGO showed excellent selectivity and anti-interference towards CAP recognition. The CoAl2O4/rGO showed promising potential for CAP analysis in tap water, river water, and pharmaceutical wastewater with good % recovery rates. Moreover, the CoAl2O4/rGO nanocomposite is an efficient catalyst for the photodegradation of CAP as revealed by the UV-vis spectroscopy results, which showed that the CoAl2O4/rGO nanocomposite exhibits 100% CAP degradation efficiency within 80 min under natural sunlight and displays good stability and reusability of the catalyst.