{"title":"具有潜在抗菌应用和有效光催化降解污染物的环保型γ-Al2O3/AgO纳米复合材料","authors":"Zarah Alqarni","doi":"10.1007/s11164-024-05498-w","DOIUrl":null,"url":null,"abstract":"<div><p>Addressing the dual challenges of environmental pollution and antibiotic resistance, this study investigates the synthesis and application of biosynthesized aluminum oxide nanoparticles (γ-Al₂O₃ NPs) and aluminum oxide/silver oxide nanocomposite (γ-Al₂O₃/AgO NC) using <i>Ocimum basilicum</i> plant extract. The green synthesis approach yielded stable NPs, characterized by XRD, SEM, TEM, FTIR, and UV–Vis techniques. The γ-Al₂O₃/AgO NC exhibited a band gap energy of 3.4 eV and an average particle size of 35 nm, compared to 3.6 eV and 30 nm for γ-Al<sub>2</sub>O<sub>3</sub> NPs. Zeta potential measurements demonstrated good stability, with values of -24.5 mV for γ-Al₂O₃ NPs and − 28.6 mV for γ-Al₂O₃/AgO NC. The antimicrobial activity of γ-Al<sub>2</sub>O<sub>3</sub> NPs and γ-Al₂O₃/AgO NC was evaluated against <i>Escherichia coli</i> (<i>E. coli</i>) and <i>Staphylococcus aureus</i> (<i>S. aureus</i>). <i>E. coli</i> exhibited an inhibition zone of 18.0 mm, while <i>S. aureus</i> showed a zone of 22.8 mm at a concentration of 5 µg/mL when treated with γ-Al₂O₃ NPs. Furthermore, using the γ-Al₂O₃/AgO NC, the inhibition zones increased significantly to 27.6 mm for <i>E. coli</i> and 23.8 mm for <i>S. aureus</i>, indicating enhanced antibacterial efficacy of the nanocomposite. In photocatalytic experiments, γ-Al₂O₃/AgO NC achieved 96.5% degradation of rhodamine B (RhB) dye within 90 min under sunlight, maintaining 93.05% efficiency after five cycles. These results underscore the dual functionality of γ-Al₂O₃/AgO NC as a sustainable material for environmental remediation and biomedical applications.</p><h3>Graphical Abstract</h3>\n<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":753,"journal":{"name":"Research on Chemical Intermediates","volume":"51 2","pages":"1039 - 1062"},"PeriodicalIF":2.8000,"publicationDate":"2025-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Eco-friendly γ-Al2O3/AgO nanocomposites with potential antibacterial applications and effective photocatalytic degradation of pollutants\",\"authors\":\"Zarah Alqarni\",\"doi\":\"10.1007/s11164-024-05498-w\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Addressing the dual challenges of environmental pollution and antibiotic resistance, this study investigates the synthesis and application of biosynthesized aluminum oxide nanoparticles (γ-Al₂O₃ NPs) and aluminum oxide/silver oxide nanocomposite (γ-Al₂O₃/AgO NC) using <i>Ocimum basilicum</i> plant extract. The green synthesis approach yielded stable NPs, characterized by XRD, SEM, TEM, FTIR, and UV–Vis techniques. The γ-Al₂O₃/AgO NC exhibited a band gap energy of 3.4 eV and an average particle size of 35 nm, compared to 3.6 eV and 30 nm for γ-Al<sub>2</sub>O<sub>3</sub> NPs. Zeta potential measurements demonstrated good stability, with values of -24.5 mV for γ-Al₂O₃ NPs and − 28.6 mV for γ-Al₂O₃/AgO NC. The antimicrobial activity of γ-Al<sub>2</sub>O<sub>3</sub> NPs and γ-Al₂O₃/AgO NC was evaluated against <i>Escherichia coli</i> (<i>E. coli</i>) and <i>Staphylococcus aureus</i> (<i>S. aureus</i>). <i>E. coli</i> exhibited an inhibition zone of 18.0 mm, while <i>S. aureus</i> showed a zone of 22.8 mm at a concentration of 5 µg/mL when treated with γ-Al₂O₃ NPs. Furthermore, using the γ-Al₂O₃/AgO NC, the inhibition zones increased significantly to 27.6 mm for <i>E. coli</i> and 23.8 mm for <i>S. aureus</i>, indicating enhanced antibacterial efficacy of the nanocomposite. In photocatalytic experiments, γ-Al₂O₃/AgO NC achieved 96.5% degradation of rhodamine B (RhB) dye within 90 min under sunlight, maintaining 93.05% efficiency after five cycles. These results underscore the dual functionality of γ-Al₂O₃/AgO NC as a sustainable material for environmental remediation and biomedical applications.</p><h3>Graphical Abstract</h3>\\n<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>\",\"PeriodicalId\":753,\"journal\":{\"name\":\"Research on Chemical Intermediates\",\"volume\":\"51 2\",\"pages\":\"1039 - 1062\"},\"PeriodicalIF\":2.8000,\"publicationDate\":\"2025-01-07\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Research on Chemical Intermediates\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s11164-024-05498-w\",\"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":"Research on Chemical Intermediates","FirstCategoryId":"92","ListUrlMain":"https://link.springer.com/article/10.1007/s11164-024-05498-w","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
Eco-friendly γ-Al2O3/AgO nanocomposites with potential antibacterial applications and effective photocatalytic degradation of pollutants
Addressing the dual challenges of environmental pollution and antibiotic resistance, this study investigates the synthesis and application of biosynthesized aluminum oxide nanoparticles (γ-Al₂O₃ NPs) and aluminum oxide/silver oxide nanocomposite (γ-Al₂O₃/AgO NC) using Ocimum basilicum plant extract. The green synthesis approach yielded stable NPs, characterized by XRD, SEM, TEM, FTIR, and UV–Vis techniques. The γ-Al₂O₃/AgO NC exhibited a band gap energy of 3.4 eV and an average particle size of 35 nm, compared to 3.6 eV and 30 nm for γ-Al2O3 NPs. Zeta potential measurements demonstrated good stability, with values of -24.5 mV for γ-Al₂O₃ NPs and − 28.6 mV for γ-Al₂O₃/AgO NC. The antimicrobial activity of γ-Al2O3 NPs and γ-Al₂O₃/AgO NC was evaluated against Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus). E. coli exhibited an inhibition zone of 18.0 mm, while S. aureus showed a zone of 22.8 mm at a concentration of 5 µg/mL when treated with γ-Al₂O₃ NPs. Furthermore, using the γ-Al₂O₃/AgO NC, the inhibition zones increased significantly to 27.6 mm for E. coli and 23.8 mm for S. aureus, indicating enhanced antibacterial efficacy of the nanocomposite. In photocatalytic experiments, γ-Al₂O₃/AgO NC achieved 96.5% degradation of rhodamine B (RhB) dye within 90 min under sunlight, maintaining 93.05% efficiency after five cycles. These results underscore the dual functionality of γ-Al₂O₃/AgO NC as a sustainable material for environmental remediation and biomedical applications.
期刊介绍：
Research on Chemical Intermediates publishes current research articles and concise dynamic reviews on the properties, structures and reactivities of intermediate species in all the various domains of chemistry.
The journal also contains articles in related disciplines such as spectroscopy, molecular biology and biochemistry, atmospheric and environmental sciences, catalysis, photochemistry and photophysics. In addition, special issues dedicated to specific topics in the field are regularly published.
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