{"title":"增强生物介导的 Ag@Cu2O NPs 对氨吡啶的光催化活性：动力学模型和机理途径","authors":"Pratibha Attri, Sangeeta Garg, Jatinder Kumar Ratan, Ardhendu Sekhar Giri","doi":"10.1007/s11814-024-00283-2","DOIUrl":null,"url":null,"abstract":"<div><p>To enhance the photocatalytic activity of Cu<sub>2</sub>O NPs, <i>Tabernaemontana divaricata</i> leaf extract was used to synthesize Ag@Cu<sub>2</sub>O NPs. The synthesized Ag@Cu<sub>2</sub>O NPs were characterized using UV–Vis, XPS, XRD, and HR-TEM. The mechanism of Ag onto Cu<sub>2</sub>O NPs showed that the plant extract was fully saturated with flavonoids and can implant Ag onto Cu<sub>2</sub>O NPs. XPS spectra showed a shift towards lower binding energy for Cu 2<i>p</i> peaks from 932 to 931 eV and 952 to 951 eV, which confirmed the formation of Ag@Cu<sub>2</sub>O NPs. HR-TEM investigation indicated that the lattice distance was <i>d</i> = 0.25 nm which corresponds to the (111) plane of Ag, hence demonstrating the fabrication of Ag@Cu<sub>2</sub>O NPs. The degradation efficiency of fampridine was enhanced using Ag@Cu<sub>2</sub>O NPs to 95% with 97% chemical oxygen demand (COD) removal and 75% total organic carbon (TOC) conversion after 210 min of reaction time compared to Cu<sub>2</sub>O NPs. The modified first-order kinetic (MFOK) model was well fitted for the TOC conversion of fampridine, with <i>R</i><sup>2</sup> = 0.99 as compared to the first-order kinetic (FOK) model. Liquid chromatography–mass spectroscopy (LC–MS) spectra for the degradation of fampridine showed ten intermediate fragments. The synthesized Ag@Cu<sub>2</sub>O NPs also showed a high inhibition zone for the two different bacterial pathogens.</p></div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"41 12","pages":"3191 - 3211"},"PeriodicalIF":2.9000,"publicationDate":"2024-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Enhanced Photocatalytic Activity of Bio-Mediated Ag@Cu2O NPs Towards Fampridine: Kinetic Modelling and Mechanistic Pathways\",\"authors\":\"Pratibha Attri, Sangeeta Garg, Jatinder Kumar Ratan, Ardhendu Sekhar Giri\",\"doi\":\"10.1007/s11814-024-00283-2\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>To enhance the photocatalytic activity of Cu<sub>2</sub>O NPs, <i>Tabernaemontana divaricata</i> leaf extract was used to synthesize Ag@Cu<sub>2</sub>O NPs. The synthesized Ag@Cu<sub>2</sub>O NPs were characterized using UV–Vis, XPS, XRD, and HR-TEM. The mechanism of Ag onto Cu<sub>2</sub>O NPs showed that the plant extract was fully saturated with flavonoids and can implant Ag onto Cu<sub>2</sub>O NPs. XPS spectra showed a shift towards lower binding energy for Cu 2<i>p</i> peaks from 932 to 931 eV and 952 to 951 eV, which confirmed the formation of Ag@Cu<sub>2</sub>O NPs. HR-TEM investigation indicated that the lattice distance was <i>d</i> = 0.25 nm which corresponds to the (111) plane of Ag, hence demonstrating the fabrication of Ag@Cu<sub>2</sub>O NPs. The degradation efficiency of fampridine was enhanced using Ag@Cu<sub>2</sub>O NPs to 95% with 97% chemical oxygen demand (COD) removal and 75% total organic carbon (TOC) conversion after 210 min of reaction time compared to Cu<sub>2</sub>O NPs. The modified first-order kinetic (MFOK) model was well fitted for the TOC conversion of fampridine, with <i>R</i><sup>2</sup> = 0.99 as compared to the first-order kinetic (FOK) model. Liquid chromatography–mass spectroscopy (LC–MS) spectra for the degradation of fampridine showed ten intermediate fragments. The synthesized Ag@Cu<sub>2</sub>O NPs also showed a high inhibition zone for the two different bacterial pathogens.</p></div>\",\"PeriodicalId\":684,\"journal\":{\"name\":\"Korean Journal of Chemical Engineering\",\"volume\":\"41 12\",\"pages\":\"3191 - 3211\"},\"PeriodicalIF\":2.9000,\"publicationDate\":\"2024-09-21\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Korean Journal of Chemical Engineering\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s11814-024-00283-2\",\"RegionNum\":4,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"CHEMISTRY, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Korean Journal of Chemical Engineering","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1007/s11814-024-00283-2","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
Enhanced Photocatalytic Activity of Bio-Mediated Ag@Cu2O NPs Towards Fampridine: Kinetic Modelling and Mechanistic Pathways
To enhance the photocatalytic activity of Cu2O NPs, Tabernaemontana divaricata leaf extract was used to synthesize Ag@Cu2O NPs. The synthesized Ag@Cu2O NPs were characterized using UV–Vis, XPS, XRD, and HR-TEM. The mechanism of Ag onto Cu2O NPs showed that the plant extract was fully saturated with flavonoids and can implant Ag onto Cu2O NPs. XPS spectra showed a shift towards lower binding energy for Cu 2p peaks from 932 to 931 eV and 952 to 951 eV, which confirmed the formation of Ag@Cu2O NPs. HR-TEM investigation indicated that the lattice distance was d = 0.25 nm which corresponds to the (111) plane of Ag, hence demonstrating the fabrication of Ag@Cu2O NPs. The degradation efficiency of fampridine was enhanced using Ag@Cu2O NPs to 95% with 97% chemical oxygen demand (COD) removal and 75% total organic carbon (TOC) conversion after 210 min of reaction time compared to Cu2O NPs. The modified first-order kinetic (MFOK) model was well fitted for the TOC conversion of fampridine, with R2 = 0.99 as compared to the first-order kinetic (FOK) model. Liquid chromatography–mass spectroscopy (LC–MS) spectra for the degradation of fampridine showed ten intermediate fragments. The synthesized Ag@Cu2O NPs also showed a high inhibition zone for the two different bacterial pathogens.
期刊介绍：
The Korean Journal of Chemical Engineering provides a global forum for the dissemination of research in chemical engineering. The Journal publishes significant research results obtained in the Asia-Pacific region, and simultaneously introduces recent technical progress made in other areas of the world to this region. Submitted research papers must be of potential industrial significance and specifically concerned with chemical engineering. The editors will give preference to papers having a clearly stated practical scope and applicability in the areas of chemical engineering, and to those where new theoretical concepts are supported by new experimental details. The Journal also regularly publishes featured reviews on emerging and industrially important subjects of chemical engineering as well as selected papers presented at international conferences on the subjects.
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