Comparative study of the structural, optical, and electrochemical properties of γ-Ga2O3 synthesized by microwave hydrothermal and sol–gel techniques

IF 2.6 4区 化学 Q3 ELECTROCHEMISTRY
Mahsa Sadat Sarmalek, Mehdi Adelifard, Seyed Ahmad Nabavi Amri
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Abstract

This research focused on the synthesis of gallium oxide (γ-Ga2O3) nanoparticles using sol–gel and hydrothermal techniques. X-ray diffraction (XRD), field emission electron microscopy (FESEM), UV–Vis spectrophotometer, Fourier transform infrared spectroscopy (FTIR), cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), calculation of specific capacitance (SC), and specific capacitance (Q) techniques were used. XRD patterns showed the formation of the cubic phase of gallium oxide (γ-Ga2O3). The polyhedral and spherical grains can be seen in the FESEM images of the synthesized nanostructures. The band gap values were determined between 4.29 and 4.42 eV. The FTIR results indicate the formation of a gallium oxide structure. The cyclic voltammetry (CV) results are consistent with the redox reactions performed. Samples produced by sol–gel and hydrothermal synthesis, then microwave-annealed, have the highest capacity (SC). They show values of 1172.6 mAh g−1 and 1261.9 mAh g−1, respectively. These results show that these nanoparticles are effective anodes for lithium-ion batteries.

Abstract Image

微波水热法和溶胶-凝胶法合成的 γ-Ga2O3 的结构、光学和电化学特性比较研究
本研究的重点是利用溶胶-凝胶和水热技术合成氧化镓(γ-Ga2O3)纳米粒子。研究采用了 X 射线衍射 (XRD)、场发射电子显微镜 (FESEM)、紫外可见分光光度计、傅立叶变换红外光谱 (FTIR)、循环伏安法 (CV)、电化学阻抗光谱 (EIS)、比电容 (SC) 和比电容 (Q) 计算等技术。XRD 图谱显示形成了氧化镓的立方相(γ-Ga2O3)。从合成纳米结构的 FESEM 图像中可以看到多面体和球形晶粒。带隙值在 4.29 和 4.42 eV 之间。傅立叶变换红外光谱结果表明形成了氧化镓结构。循环伏安法(CV)结果与氧化还原反应一致。通过溶胶-凝胶法和水热法合成,然后进行微波退火的样品具有最高的容量(SC)。它们的值分别为 1172.6 mAh g-1 和 1261.9 mAh g-1。这些结果表明,这些纳米粒子是锂离子电池的有效阳极。
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来源期刊
CiteScore
4.80
自引率
4.00%
发文量
227
审稿时长
4.1 months
期刊介绍: The Journal of Solid State Electrochemistry is devoted to all aspects of solid-state chemistry and solid-state physics in electrochemistry. The Journal of Solid State Electrochemistry publishes papers on all aspects of electrochemistry of solid compounds, including experimental and theoretical, basic and applied work. It equally publishes papers on the thermodynamics and kinetics of electrochemical reactions if at least one actively participating phase is solid. Also of interest are articles on the transport of ions and electrons in solids whenever these processes are relevant to electrochemical reactions and on the use of solid-state electrochemical reactions in the analysis of solids and their surfaces. The journal covers solid-state electrochemistry and focusses on the following fields: mechanisms of solid-state electrochemical reactions, semiconductor electrochemistry, electrochemical batteries, accumulators and fuel cells, electrochemical mineral leaching, galvanic metal plating, electrochemical potential memory devices, solid-state electrochemical sensors, ion and electron transport in solid materials and polymers, electrocatalysis, photoelectrochemistry, corrosion of solid materials, solid-state electroanalysis, electrochemical machining of materials, electrochromism and electrochromic devices, new electrochemical solid-state synthesis. The Journal of Solid State Electrochemistry makes the professional in research and industry aware of this swift progress and its importance for future developments and success in the above-mentioned fields.
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