Low temperature synthesis and thermal properties of Ag-Cu alloy nanoparticles  

Ag-Cu合金纳米颗粒的低温合成与热学性能(英文)

作　　者：W.BHAGATHSINGH A.SAMSON NESARAJ 

机构地区：[1]School of Nanosciences and Technology,Karunya University,Coimbatore-641 114,Tamil Nadu,India [2]Department of Chemistry,Karunya University,Coimbatore-641 114,Tamil Nadu,India

出　　处：《Transactions of Nonferrous Metals Society of China》2013年第1期128-133,共6页中国有色金属学报（英文版）

摘　　要：Ag-Cu alloy nanoparticles were synthesized by simple low temperature chemical reduction method using metal salts（acetate/sulphates） in aqueous solution with sodium borohydride as reducing agent.The chemical reduction was carried out in the presence of nitrogen gas in order to prevent the oxidation of copper during the reaction process.The alloy nanoparticles were characterized by XRD,UV-Vis,particle size analysis,EDS,TG-DTA and SEM analysis.From the XRD analysis,the crystallite sizes of the prepared samples were calculated using Scherrer formula and the values were found to be in the range of 15 nm.UV-Vis studies conform the formation of alloy nanoparticles.EDS analysis shows the presence of silver and copper in the samples.The SEM observation reveals that the samples consist of grains with average grain size up to 40 nm,and the particle size dependant melting point was studied by TG-DTA.采用一种简单的低温化学还原方法,在水溶液中利用NaBH4作为还原剂还原醋酸或硫酸铜,制备了Ag-Cu纳米颗粒。反应过程中通入氮气来防止生成的合金被氧化。采用XRD、紫外可见光谱、颗粒尺寸测试、EDS分析、TG-DTA分析和SEM观察等手段来表征合成的Ag-Cu纳米颗粒。XRD分析表明,所合成的Ag-Cu纳米颗粒的晶粒尺寸为15nm左右。紫外可见光谱分析证实了纳米颗粒的生成。EDS分析表明,样品中存在Ag和Cu。SEM观察表明,所制备的样品的平均晶粒尺寸为40nm。TG-DTA研究表明,合金的熔点与颗粒尺寸有关。

关 键 词：Ag-Cu alloy nanoparticles chemical reduction method CHARACTERIZATION 

分 类 号：TB383.1[一般工业技术—材料科学与工程] TG146.32[金属学及工艺—金属材料]