二氧化硅对钴铁氧体纳米粒子的结构、磁性和非线性光学行为的影响

IF 4 2区化学 Q2 CHEMISTRY, PHYSICAL Journal of Molecular Structure Pub Date : 2024-09-03 DOI:10.1016/j.molstruc.2024.139912

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摘要

采用溶胶-凝胶法合成了 CoFe2O4 和 CoFe2O4/SiO2。研究采用了 XRD、FT-IR、SEM、TEM、VSM、UV-Vis DRS 和 Z 扫描技术。CoFe2O4 具有反立方脊柱结构。TEM 和 SEM 证实 CoFe2O4/SiO2 纳米复合材料的结晶尺寸小于 CoFe2O4。结果表明，两个样品具有面心立方尖晶石相的纯单相钴铁氧体。CoFe2O4 纳米复合材料中的二氧化硅基质会减小颗粒尺寸、磁性能并增强带隙。经计算，CoFe2O4 和 CoFe2O4/SiO2 的带隙能分别为 1.76 和 1.92 eV。我们在非线性光学方面的研究结果表明，CoFe2O4/SiO2 的独特特性为电信和其他相关领域的发展提供了机遇。

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Effect of SiO2 on structural, magnetic, and nonlinear optical behavior of cobalt ferrite nanoparticles

CoFe₂O₄ and CoFe₂O₄/SiO₂ were synthesized by sol-gel method. The studies carried out using XRD, FT-IR, SEM, TEM, VSM, UV–Vis DRS, and Z-scan techniques. The CoFe₂O₄ has the inverse cubic spinal structure. TEM and SEM confirmed the less crystallite size of CoFe₂O₄/SiO₂ nanocomposite than CoFe₂O₄. The results show that two samples have a pure single phase cobalt ferrite with face-centred cubic spinel phase. SiO₂ matrix in CoFe₂O₄ nanocomposite results in reduction particle size and magnetic properties as well as enhancement band gap. The band-gap energy of CoFe₂O₄ and CoFe₂O₄/SiO₂ calculated 1.76 and 1.92 eV, respectively. Our findings in nonlinear optical aspects suggest that the distinctive characteristics of CoFe₂O₄/SiO₂ present opportunities for advancements in telecommunications and other related fields.

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来源期刊

Journal of Molecular Structure 化学-物理化学

CiteScore

7.10

自引率

15.80%

发文量

2384

审稿时长

45 days

期刊介绍： The Journal of Molecular Structure is dedicated to the publication of full-length articles and review papers, providing important new structural information on all types of chemical species including: • Stable and unstable molecules in all types of environments (vapour, molecular beam, liquid, solution, liquid crystal, solid state, matrix-isolated, surface-absorbed etc.) • Chemical intermediates • Molecules in excited states • Biological molecules • Polymers. The methods used may include any combination of spectroscopic and non-spectroscopic techniques, for example: • Infrared spectroscopy (mid, far, near) • Raman spectroscopy and non-linear Raman methods (CARS, etc.) • Electronic absorption spectroscopy • Optical rotatory dispersion and circular dichroism • Fluorescence and phosphorescence techniques • Electron spectroscopies (PES, XPS), EXAFS, etc. • Microwave spectroscopy • Electron diffraction • NMR and ESR spectroscopies • Mössbauer spectroscopy • X-ray crystallography • Charge Density Analyses • Computational Studies (supplementing experimental methods) We encourage publications combining theoretical and experimental approaches. The structural insights gained by the studies should be correlated with the properties, activity and/ or reactivity of the molecule under investigation and the relevance of this molecule and its implications should be discussed.