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Preparation of PVP-coated copper oxide nanosheets as antibacterial and antifungal agents

机译：制备PVP包覆的氧化铜纳米片作为抗菌剂和抗真菌剂

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摘要

Copper oxide (CuO) nanosheets synthesized in polyvinylpyrrolidone (PVP) were characterized with respect to antimicrobial activity by quick precipitation method. Different sizes and shapes of CuO nanosheets were obtained by simple variations of PVP concentrations. The x-ray diffraction results revealed the formation of pure-phase CuO with monoclinic structure. Transmission electron microscopy analysis showed that the average ratio of length to width of these nanosheets increased with increasing PVP concentrations. Due to the quantum size effect, CuO nanosheets exhibit a blue shift in the ultraviolet-visible spectra. Field emission scanning electron microscopy results showed that as the concentration of PVP increased, well-defined morphologies were formed on the surface of the products. Energy dispersive analysis of x-ray clearly confirmed the presence of Cu and O with an atomic ratio of 1:1. Fourier transform infrared spectroscopy results showed that C=0 in PVP coordinated with CuO and formed a protective layer. The mechanism of the reaction was also discussed. CuO nanosheets in suspension showed activity against a range of bacterial pathogens and fungi with minimum bactericidal concentrations (MBC_s) ranging from 100 to 5000 μg/mL. The extent of the inhibition zones and the MBCs was found to be size-dependent.
机译：通过快速沉淀法表征了聚乙烯吡咯烷酮（PVP）中合成的氧化铜（CuO）纳米片的抗菌活性。通过简单地改变PVP浓度即可获得不同尺寸和形状的CuO纳米片。 X射线衍射结果表明形成了具有单斜晶结构的纯相CuO。透射电子显微镜分析表明，这些纳米片的长宽比平均随PVP浓度的增加而增加。由于量子尺寸效应，CuO纳米片在紫外可见光谱中显示出蓝移。场发射扫描电子显微镜结果表明，随着PVP浓度的增加，在产品表面形成清晰的形态。 X射线的能量色散分析清楚地证实了原子比为1：1的Cu和O的存在。傅里叶变换红外光谱结果表明，PVP中的C = 0与CuO配位并形成保护层。还讨论了反应机理。悬浮液中的CuO纳米片表现出对一系列细菌病原体和真菌的活性，其最低杀菌浓度（MBC_s）为100至5000μg/ mL。发现抑制区和MBC的程度是尺寸依赖性的。

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  • 来源
    《Journal of Materials Research》 |2013年第22期|3109-3118|共10页
  • 作者

    Mahdi Shahmiri; Nor Azowa Ibrahim; Fatemeh Shayesteh; Nilofar Asim; Nabi Motallebi;

  • 作者单位

    Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia;

    Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia;

    School of Environmental Science and Natural Resources, Faculty of science and technology,University Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia;

    Solar Energy Research Institute, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia;

    ACECR (Academic Center for Education, Culture and Research), 14155-4364 Tehran, Iran;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
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