Novel Mo: CoFe2O4 nanoparticles combustion synthesis for opto-magneto-electrochemical applications: A systematic analysis

IF 4.8 2区材料科学 Q1 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Materials Characterization Pub Date : 2024-11-05 DOI:10.1016/j.matchar.2024.114514

Njod Al Sdran , Kamlesh V. Chandekar , Sajid Ali Ansari , Mohd Shkir

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引用次数: 0

Abstract

In current work, various concentrations (0.0 wt%, 0.10 wt%, 0.25 wt%, 0.50 %,0.75 wt%, and 1 wt%) of Molybdenum (Mo) - doped cobalt ferrite (CFO) nanoparticles (Mo:CFO NPs) were synthesized using the flash combustion approach. The structural analysis of the prepared Mo:CFO was examined by the XRD patterns, and the obtained crystallite size 48.64, 46.72, 22.81, 21.05, 18.03, and 19.31 nm for 0.0 wt%, 0.10 wt%, 0.25 wt%, 0.50 wt%, 0.75 wt%, and 1 wt% Mo:CFO NPs, respectively. The presence of stoichiometry and homogeneity of the prepared Mo:CFO NPs was confirmed by the EDX analysis. The five phonon modes of the prepared Mo:CFO NPs were recorded by FT-Raman spectra, and the phonon modes were observed around 220, 312, 479, 624, and 685 cm⁻¹ that corresponded o T_2g(2), E_g, T_2g(1), A_1g(2), and A_1g(1) symmetries, respectively. The grain sizes of the pure CFO and Mo:CFO NPs were evaluated using the images of scanning electron microscopy (SEM) and obtained in the range of 39–61 nm, respectively. The presence of valence states Co (2p), Fe (2p), O (1 s), and Mo (3d) in the prepared 1 wt% Mo:CFO NPs were examined by XPS spectra. The particle sizes ∼26.4 nm and ∼ 16.7 nm were obtained for pure CFO and 1 wt% Mo:CFO NPs using lognormal function fitting. The emission peaks at 445 ± 3, 521 ± 3, and 620 ± 2 nm in the PL spectra were observed by PL spectroscopy. The decrease in saturation magnetization Ms. (70.80–66.54 emu/g) and reduced remanent magnetization Mr. (24.22–18.64 emu/g) of prepared Mo: CFO NPs was observed in the MH analysis by SQUID analysis. The electrochemical study of Mo: CFO NPs (0.0 %, 0.25 %, 0.50 %, and 1.0 %) was done in a three-electrode assembly cell. The capacitance of values 650.0 Fg⁻¹, 800.0 Fg^-1, and 810.0 Fg⁻¹ for pure CFO, 0.25 % Mo: CFO, and 0.50 % Mo: CFO were recorded in electrochemical analysis. The highest capacitance of 840.0 Fg⁻¹ was observed for the electrode with 1.0 % Mo: CFO NPs. It was analyzed that the increase in CFO electrodes enhances their performance, and therefore, it can be utilized for multifunctional devices.

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用于光磁电化学应用的新型 Mo: CoFe2O4 纳米粒子燃烧合成：系统分析

本研究采用闪燃法合成了不同浓度（0.0 wt%、0.10 wt%、0.25 wt%、0.50 %、0.75 wt% 和 1 wt%）的钼（Mo）掺杂钴铁氧体（CFO）纳米粒子（Mo:CFO NPs）。通过 XRD 图谱对所制备的 Mo:CFO 进行了结构分析，0.0 wt%、0.10 wt%、0.25 wt%、0.50 wt%、0.75 wt% 和 1 wt% Mo:CFO NPs 的结晶尺寸分别为 48.64、46.72、22.81、21.05、18.03 和 19.31 nm。所制备的 Mo:CFO NPs 的化学计量和均一性已通过 EDX 分析得到证实。傅立叶变换拉曼光谱记录了制备的 Mo:CFO NPs 的五种声子模式，在 220、312、479、624 和 685 cm-1 附近观察到的声子模式分别对应于 T2g(2)、Eg、T2g(1)、A1g(2)和 A1g(1)对称性。利用扫描电子显微镜（SEM）图像评估了纯 CFO 和 Mo:CFO NPs 的晶粒尺寸，结果分别为 39-61 nm。通过 XPS 光谱检测了所制备的 1 wt% Mo:CFO NPs 中是否存在价态 Co (2p)、Fe (2p)、O (1 s) 和 Mo (3d)。利用对数正态函数拟合得到纯 CFO 和 1 wt% Mo:CFO NPs 的粒径分别为 ∼26.4 nm 和 ∼16.7 nm。聚光光谱仪观察到聚光光谱中 445 ± 3、521 ± 3 和 620 ± 2 nm 处的发射峰。通过 SQUID 分析，制备的 Mo: CFO NPs 的饱和磁化率 Ms.（70.80-66.54 emu/g）下降，剩磁率 Mr.（24.22-18.64 emu/g）降低。在三电极组装电池中对 Mo: CFO NPs（0.0%、0.25%、0.50% 和 1.0%）进行了电化学研究。在电化学分析中，纯 CFO、0.25 % Mo: CFO 和 0.50 % Mo: CFO 的电容值分别为 650.0 Fg-1、800.0 Fg-1 和 810.0 Fg-1。含有 1.0 % Mo: CFO NPs 的电极电容最高，达到 840.0 Fg-1。分析结果表明，增加 CFO 电极可提高其性能，因此可用于多功能设备。

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来源期刊

Materials Characterization 工程技术-材料科学：表征与测试

CiteScore

7.60

自引率

8.50%

发文量

746

审稿时长

36 days

期刊介绍： Materials Characterization features original articles and state-of-the-art reviews on theoretical and practical aspects of the structure and behaviour of materials. The Journal focuses on all characterization techniques, including all forms of microscopy (light, electron, acoustic, etc.,) and analysis (especially microanalysis and surface analytical techniques). Developments in both this wide range of techniques and their application to the quantification of the microstructure of materials are essential facets of the Journal. The Journal provides the Materials Scientist/Engineer with up-to-date information on many types of materials with an underlying theme of explaining the behavior of materials using novel approaches. Materials covered by the journal include: Metals & Alloys Ceramics Nanomaterials Biomedical materials Optical materials Composites Natural Materials.