Optical, Structural and Mechanical Properties of Ag2O2/Ag2CO3 Nanocomposite Synthesized by Air-Plasma Electrolysis

IF 1.4 4区 综合性期刊 Q2 MULTIDISCIPLINARY SCIENCES
Saeed Ebrahimi, Masoud Rezvani Jalal, Seyyedeh Fatemeh Hosseini
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Abstract

Synthesis of nanocomposite Ag2O2/Ag2CO3 by the new method of pin-to-solution air-plasma electrolysis and effect of electrolyte concentration on its morphological, structural, mechanical and optical properties are considered in the present paper. XRD analysis reveals that, independent on the concentration, the nanocomposite has monoclinic and hexagonal crystal structure. Mechanical characterization by the Williamson-Hall method shows that the crystallite size of the composite synthesized in high concentration (0.3 M) is 40 nm and the lattice strain and dislocation density are − 0.0002 and 6.149×1014 line/m2, respectively. TEM images and XRD pattern show that reduction of the solution concentration (to 0.2 molar) leads to smaller crystallite size (~ 17 nm) and increased lattice defects. By FTIR spectroscopy, chemical bonds of the sample are studied and formation of the expected bonds is confirmed. Optical characterization of the nanocomposites by UV–Vis spectroscopy through DASF analysis shows that the transition is direct allowed with 0.9 eV gap. Other parameters such as Urbach energy, steepness parameter, strength of the electron–phonon interaction, refractive index and dielectric constant are also determined. It is found that the concentration has a small effect on most of the optical properties of the obtained nanocomposites.

空气等离子体电解合成Ag2O2/Ag2CO3纳米复合材料的光学、结构和力学性能
本文研究了针脚-溶液空气等离子体电解法制备Ag2O2/Ag2CO3纳米复合材料,以及电解质浓度对其形貌、结构、力学和光学性能的影响。XRD分析表明,纳米复合材料具有单斜晶和六方晶的结构,与浓度无关。Williamson-Hall法力学表征表明,高浓度(0.3 M)合成的复合材料晶粒尺寸为40 nm,晶格应变和位错密度分别为- 0.0002和6.149×1014 line/m2。TEM和XRD图谱显示,溶液浓度降低(0.2 mol / l),晶体尺寸减小(~ 17 nm),晶格缺陷增多。利用红外光谱对样品的化学键进行了研究,并确定了预期键的形成。利用紫外可见光谱(DASF)对纳米复合材料进行了光学表征,结果表明,在0.9 eV的间隙下可以直接发生跃迁。其他参数如厄巴赫能量、陡度参数、电子-声子相互作用强度、折射率和介电常数也被确定。结果表明,浓度对制备的纳米复合材料的大部分光学性能影响不大。
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来源期刊
CiteScore
4.00
自引率
5.90%
发文量
122
审稿时长
>12 weeks
期刊介绍: The aim of this journal is to foster the growth of scientific research among Iranian scientists and to provide a medium which brings the fruits of their research to the attention of the world’s scientific community. The journal publishes original research findings – which may be theoretical, experimental or both - reviews, techniques, and comments spanning all subjects in the field of basic sciences, including Physics, Chemistry, Mathematics, Statistics, Biology and Earth Sciences
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