E. K. Abdel-Khalek, Abdullah H. Alluhayb, Alaa M. Younis, E. A. Mohamed
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引用次数: 0
摘要
最近，我们制备出了具有抗菌性能的低成本 SrFeO3-δ 包晶石。在本研究中，为了提高 SrFeO3-δ 包晶的抗菌性能，我们在其中掺杂了银。通过溶胶-凝胶法制备了 Sr1-xAgxFeO3-δ 包晶石样品表面的 Ag+ 纳米粒子。X 射线衍射（XRD）、透射电子显微镜（TEM）、选区电子衍射（SAED）、高分辨率 TEM（HR-TEM）、EDS 元素图谱和傅立叶变换红外光谱仪（FT-IR）对这些样品的结构特性进行了表征。这些技术证实，在立方 Sr1-xAgxFeO3-δ 包晶结构表面存在少量立方银球形纳米颗粒。此外，这些样品的 X 射线光电子能谱（XPS）显示，样品表面存在 Ag1+ 离子、氧空位和铁离子的混合价态。使用 Kubelka-Munk 方程估算了这些样品的能带隙，其值随着 Ag 的增加而增加，最高可达 x = 0.10。此外，磁滞回线（M - H）显示，这些样品显示出反铁磁性行为，同时具有少量铁磁性秩序。最后，这些样品的抗菌特性表明，抗菌活性随着 Ag 的增加而提高（x = 0.10）。我们的研究结果表明，Sr1-xAgxFeO3-δ 包晶样品表面的 Ag+ 纳米粒子是一种很有前景的抗菌剂。
Study the influence of Ag+ nanoparticles on the surface of the Sr1-xAgxFeO3-δ perovskite on optical, magnetic and antibacterial properties
Recently, we produced low cost SrFeO3-δ perovskite with antibacterial properties. In this study to improve the antibacterial properties of SrFeO3-δ perovskite, we doped it with silver. Ag+ nanoparticles on the surface of the Sr1-xAgxFeO3-δ perovskite samples were prepared by sol-gel method. Structural properties of these samples were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), selected area electron diffraction (SAED), high-resolution TEM (HR-TEM), EDS elemental mapping and Fourier transform infrared spectrometer (FT-IR). These techniques confirmed the presence of small amount of cubic Ag spherical nanoparticles on the surface of the cubic Sr1-xAgxFeO3-δ perovskite structure. Further, X-ray photoelectron spectroscopy (XPS) for these samples revealed the presence of Ag1+ ions, oxygen vacancies and mixed valence states of Fe ions on the surface of the samples. The energy band gap of these samples was estimated using Kubelka–Munk equation and its value increased with increasing Ag up to x = 0.10. Additionally, Magnetic hysteresis (M − H) loops revealed that these samples displayed antiferromagnetic behavior with a small amount of ferromagnetic order. Finally, the antibacterial properties of these samples revealed that the antimicrobial activities were improved with increasing Ag (x = 0.10). Our results showed that Ag+ nanoparticles on the surface of the Sr1-xAgxFeO3-δ perovskite samples are a promising antimicrobial agent.
期刊介绍：
The primary objective of the Journal of Sol-Gel Science and Technology (JSST), the official journal of the International Sol-Gel Society, is to provide an international forum for the dissemination of scientific, technological, and general knowledge about materials processed by chemical nanotechnologies known as the "sol-gel" process. The materials of interest include gels, gel-derived glasses, ceramics in form of nano- and micro-powders, bulk, fibres, thin films and coatings as well as more recent materials such as hybrid organic-inorganic materials and composites. Such materials exhibit a wide range of optical, electronic, magnetic, chemical, environmental, and biomedical properties and functionalities. Methods for producing sol-gel-derived materials and the industrial uses of these materials are also of great interest.
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