铜
透射电子显微镜
材料科学
单排替反应
结块
能量色散X射线光谱学
电化学
扫描电子显微镜
分析化学(期刊)
纳米颗粒
光谱学
石英晶体微天平
表征(材料科学)
化学工程
结晶学
化学
无机化学
纳米技术
冶金
物理化学
电极
复合材料
吸附
物理
色谱法
量子力学
工程类
作者
Valérie Mancier,Céline Rousse-Bertrand,Jean Dille,Jean Michel,Patrick Fricoteaux
标识
DOI:10.1016/j.ultsonch.2009.12.009
摘要
Cu-Ag core-shell nanopowders have been prepared by ultrasound-assisted electrochemistry followed by a displacement reaction. The composition of the particles has been determined by X-ray diffraction (XRD) and energy dispersive X-ray spectroscopy (EDX). The XRD patterns versus time displacement show that higher are the silver peaks intensities, weaker are the copper ones. That exhibits the progressive recovering of copper by silver. EDX results and quartz crystal microbalance results indicate that various reaction mechanisms are implied in this process. Transmission electron microscopy (TEM) points out variable nanometric diameter grain and some small agglomerates. Elemental mapping obtained by electron energy-loss spectroscopy (EELS) underlines the core-shell structure.
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