Debabrata Mishra, Jyotirmayee Nanda, Sridhar Parida, K. J. Sankaran, Suryakanta Ghadei
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引用次数: 0
摘要
本研究探讨了通过溶胶-凝胶自燃烧法合成的 Y3+ 和 Co2+ 共取代 LaFeO3 纳米粒子的综合表征。研究采用多种技术对合成的 La1-xYxFe1-y CoyO3 样品(x = 0,0.10 和 y = 0,0.03,0.05,0.07)进行了表征,如 X 射线衍射 (XRD)、带 EDX 的扫描电子显微镜 (SEM)、拉曼光谱、紫外可见光谱和振动样品磁力计 (VSM)。拉曼光谱和 X 射线衍射分析以及里特维尔德精炼技术提供了纯正正方体 LaFeO3 相的确凿证据。微观结构研究揭示了团聚型、不规则的颗粒分布,EDX 分析则证实了元素组成。XPS 研究证明了 Fe2+ 和 Fe3+ 氧化态的存在,而 Co 具有 Co3+ 氧化态。紫外-可见光谱分析表明,随着掺杂百分比的增加,可见光吸收增强,带隙减小。VSM 测量显示了 M-H 循环,证实了材料的弱铁磁性。此外,这些纳米粒子显示出介电常数和低介电损耗,因此适合用于通信设备。总之,这些发现可为了解纳米材料的特性,从而将其应用于不同领域做出宝贵贡献。
Effect of Y3+ and Co2+ co-doping on the structural, optical, magnetic and dielectric properties of LaFeO3 nanoparticles
This study explores the comprehensive characterization of Y3+ and Co2+ co-substituted LaFeO3 nanoparticles synthesized via the sol-gel auto-combustion method. The synthesized samples, La1-xYxFe1-y CoyO3 (x = 0,0.10 and y = 0,0.03,0.05,0.07) were characterized by employing various techniques such as x-ray diffraction (XRD), Scanning Electron Microscopy (SEM) with EDX, Raman spectroscopy, UV-visible spectroscopy, and Vibrating Sample Magnetometry (VSM). The Raman and XRD analysis, supported by Rietveld refinement, provided conclusive evidence of a pure orthorhombic LaFeO3 phase. Microstructural studies unveiled an agglomerate-type, irregular particle distribution, while EDX analysis confirmed the elemental composition. The XPS study gives evidence about the presence of both Fe2+ and Fe3+ oxidation states, and Co has a Co3+ oxidation state. UV-vis spectroscopy demonstrated enhanced visible light absorption, revealing a reduced bandgap with increasing doping percentages. VSM measurements exhibited M-H loops, substantiating the weak ferromagnetic nature of the materials. Moreover, these nanoparticles exhibit dielectric constants and low dielectric losses, making them suitable for use in devices for communication. Overall, these findings may offer valuable contributions to the understanding of nanomaterial characteristics for potential applications in diverse fields.
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.