电介质
材料科学
尖晶石
兴奋剂
钴
带隙
傅里叶变换红外光谱
纳米材料
分析化学(期刊)
扫描电子显微镜
相(物质)
纳米技术
化学工程
光电子学
复合材料
化学
冶金
有机化学
色谱法
工程类
作者
Kamran Ullah,Shoaib Ali Khan,Abid Zaman,Mahidur R. Sarker,Asad Ali,Vineet Tirth,Amnah Mohammed Alsuhaibani,Ali Algahtani,Tawfiq Al‐Mughanam,Moamen S. Refat,Shafrida Sahrani,M. Abrar
出处
期刊:ACS omega
[American Chemical Society]
日期:2023-08-03
卷期号:8 (33): 29959-29965
被引量:3
标识
DOI:10.1021/acsomega.3c00541
摘要
Nanomaterials (NMs) with structural, optical, and dielectric properties are called functional or smart materials and have favorable applications in various fields of material science and nanotechnology. Pure and Co-doped MgAl2O4 were synthesized by using the sol–gel combustion method. A systematic investigation was carried out to understand the effects of the Co concentration on the crystalline phase, morphology, and optical and dielectric properties of Co-doped MgAl2O4. X-ray diffraction confirmed the cubic spinel structure with the Fd3̅m space group, and there was no impurity phase, while the surface morphology of the samples was investigated by scanning electron microscopy. The dielectric properties of the synthesized material are investigated using an LCR meter with respect to the variation in frequency (1–2 GHz), and their elemental composition has been examined through the energy-dispersive X-ray technique. The existence of the metal–oxygen Mg–Al–O bond has been confirmed by Fourier transform infrared spectroscopy. The value of the dielectric constant decreases with the increasing frequency and Co concentration. The optical behaviors of the Co2+-doped MgAl2O4 reveal that the optical properties were enhanced by increasing the cobalt concentration, which ultimately led to a narrower band gap, which make them exquisite and suitable for energy storage applications, especially for super capacitors. This work aims to focus on the effect of cobalt ions in different concentrations on structural, optical, and dielectric properties.
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