K. S. Mamatha, H. M. Suresh Kumar, T. D. Puttaraju, T. L. Soundarya, G. Nagaraju
{"title":"受生态启发利用鹅掌楸合成氧化锌/氧化铜纳米复合材料:揭示其卓越的光催化性能、对大肠杆菌和金黄色葡萄球菌的抗菌功效以及潜伏指纹研究","authors":"K. S. Mamatha, H. M. Suresh Kumar, T. D. Puttaraju, T. L. Soundarya, G. Nagaraju","doi":"10.1007/s11581-024-05823-8","DOIUrl":null,"url":null,"abstract":"<p>The current study focuses on the facile green synthesis of ZnO/CuO nanocomposites (NCs) mediated by <i>Phyllanthus niruri</i> leaf extract as a capping agent and fuel. The characterization of the synthesized NCs in comparison with the pure ZnO and CuO NPs was conducted using XRD, FT-IR, SEM-EDAX, HR-TEM, UV–Vis DRS, and PL studies. XRD analysis revealed their crystalline nature with an average crystallite size of 25 nm. SEM images showed particle agglomeration, and EDAX confirmed the elemental composition of the pure phase. HR-TEM images elucidated the presence of spherical and hexagonal shapes. The presence of bond vibrations such as Zn − O and Cu − O was confirmed by FT-IR analysis. The optical energy bandgaps were determined to be 3.27, 2.8, and 2.7 eV for ZnO, CuO NPs, and ZnO/CuO NCs respectively. PL studies of the synthesized NCs showed a blue emission with a peak position at 493 nm. The photocatalytic activity of ZnO/CuO NCs exhibited a degradation efficiency of 97.93% against methylene blue dye and 53% towards the Rose Bengal dye. Furthermore, the investigation of antibacterial activity by 96-well microtiter plate method against two bacterial strains, <i>Escherichia coli and Staphylococcus aureus</i>, revealed significant zones of inhibition, and when compared to the common antibiotic ciprofloxacin, the MIC values were 3.90 µg/mL for both <i>Staphylococcus aureus</i> and <i>Escherichia coli</i>, while the MBC values were 2.05 µg/mL for <i>Staphylococcus aureus</i> and 2.19 µg/mL for <i>Escherichia coli</i>. The prepared materials were additionally tested for latent fingerprint activity. The NCs displayed excellent properties, producing visible, clear images of latent fingerprints. Thus, the ZnO/CuO nanocomposites (NCs) synthesized using <i>Phyllanthus niruri</i> leaf extract could be a desirable catalyst for wastewater treatment and a potent antimicrobial agent against the bacteria and can be used for latent fingerprint applications.</p><h3 data-test=\"abstract-sub-heading\">Graphical Abstract</h3>\n","PeriodicalId":599,"journal":{"name":"Ionics","volume":"3 1","pages":""},"PeriodicalIF":2.4000,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Eco-inspired synthesis of ZnO/CuO nanocomposites using Phyllanthus niruri: unveiling superior photocatalytic, antibacterial efficacy against Escherichia coli and Staphylococcus aureus, and latent fingerprint studies\",\"authors\":\"K. S. Mamatha, H. M. Suresh Kumar, T. D. Puttaraju, T. L. Soundarya, G. Nagaraju\",\"doi\":\"10.1007/s11581-024-05823-8\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>The current study focuses on the facile green synthesis of ZnO/CuO nanocomposites (NCs) mediated by <i>Phyllanthus niruri</i> leaf extract as a capping agent and fuel. The characterization of the synthesized NCs in comparison with the pure ZnO and CuO NPs was conducted using XRD, FT-IR, SEM-EDAX, HR-TEM, UV–Vis DRS, and PL studies. XRD analysis revealed their crystalline nature with an average crystallite size of 25 nm. SEM images showed particle agglomeration, and EDAX confirmed the elemental composition of the pure phase. HR-TEM images elucidated the presence of spherical and hexagonal shapes. The presence of bond vibrations such as Zn − O and Cu − O was confirmed by FT-IR analysis. The optical energy bandgaps were determined to be 3.27, 2.8, and 2.7 eV for ZnO, CuO NPs, and ZnO/CuO NCs respectively. PL studies of the synthesized NCs showed a blue emission with a peak position at 493 nm. The photocatalytic activity of ZnO/CuO NCs exhibited a degradation efficiency of 97.93% against methylene blue dye and 53% towards the Rose Bengal dye. Furthermore, the investigation of antibacterial activity by 96-well microtiter plate method against two bacterial strains, <i>Escherichia coli and Staphylococcus aureus</i>, revealed significant zones of inhibition, and when compared to the common antibiotic ciprofloxacin, the MIC values were 3.90 µg/mL for both <i>Staphylococcus aureus</i> and <i>Escherichia coli</i>, while the MBC values were 2.05 µg/mL for <i>Staphylococcus aureus</i> and 2.19 µg/mL for <i>Escherichia coli</i>. The prepared materials were additionally tested for latent fingerprint activity. The NCs displayed excellent properties, producing visible, clear images of latent fingerprints. 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Eco-inspired synthesis of ZnO/CuO nanocomposites using Phyllanthus niruri: unveiling superior photocatalytic, antibacterial efficacy against Escherichia coli and Staphylococcus aureus, and latent fingerprint studies
The current study focuses on the facile green synthesis of ZnO/CuO nanocomposites (NCs) mediated by Phyllanthus niruri leaf extract as a capping agent and fuel. The characterization of the synthesized NCs in comparison with the pure ZnO and CuO NPs was conducted using XRD, FT-IR, SEM-EDAX, HR-TEM, UV–Vis DRS, and PL studies. XRD analysis revealed their crystalline nature with an average crystallite size of 25 nm. SEM images showed particle agglomeration, and EDAX confirmed the elemental composition of the pure phase. HR-TEM images elucidated the presence of spherical and hexagonal shapes. The presence of bond vibrations such as Zn − O and Cu − O was confirmed by FT-IR analysis. The optical energy bandgaps were determined to be 3.27, 2.8, and 2.7 eV for ZnO, CuO NPs, and ZnO/CuO NCs respectively. PL studies of the synthesized NCs showed a blue emission with a peak position at 493 nm. The photocatalytic activity of ZnO/CuO NCs exhibited a degradation efficiency of 97.93% against methylene blue dye and 53% towards the Rose Bengal dye. Furthermore, the investigation of antibacterial activity by 96-well microtiter plate method against two bacterial strains, Escherichia coli and Staphylococcus aureus, revealed significant zones of inhibition, and when compared to the common antibiotic ciprofloxacin, the MIC values were 3.90 µg/mL for both Staphylococcus aureus and Escherichia coli, while the MBC values were 2.05 µg/mL for Staphylococcus aureus and 2.19 µg/mL for Escherichia coli. The prepared materials were additionally tested for latent fingerprint activity. The NCs displayed excellent properties, producing visible, clear images of latent fingerprints. Thus, the ZnO/CuO nanocomposites (NCs) synthesized using Phyllanthus niruri leaf extract could be a desirable catalyst for wastewater treatment and a potent antimicrobial agent against the bacteria and can be used for latent fingerprint applications.
期刊介绍:
Ionics is publishing original results in the fields of science and technology of ionic motion. This includes theoretical, experimental and practical work on electrolytes, electrode, ionic/electronic interfaces, ionic transport aspects of corrosion, galvanic cells, e.g. for thermodynamic and kinetic studies, batteries, fuel cells, sensors and electrochromics. Fast solid ionic conductors are presently providing new opportunities in view of several advantages, in addition to conventional liquid electrolytes.