室温下制备Cu_7S_4和Ag_2S的球形空心纳米粒子  

Preparation of Global Hollow Nanoparticles of Cu_7S_4 and Ag_2S at Room Temperature

作　　者：王辰光[1] 刘润[1] 徐铸德[1] 陈卫祥[1] 

机构地区：[1]浙江大学化学系物理化学研究所,杭州310027

出　　处：《无机化学学报》2008年第5期803-807,共5页Chinese Journal of Inorganic Chemistry

基　　金：浙江省自然科学基金(No.Y405131)资助项目

摘　　要：以Cu_2O和Ag_2O纳米粒子为前驱体,利用Kirkendall效应,在室温条件下制备出Cu_7S_4和Ag_2S的球形空心纳米粒子。用X-射线衍射(XRD)、透射电镜(TEM)、扫描电镜(SEM)等测试手段对产物进行了表征。结果表明,粒子的空心化程度取决于反应物的物质的量之比;空心粒子的形貌与前驱体粒子的形貌很相似。研究了这种反应的机理,并对这两种氧化物发生这类反应的难易程度作了理论探讨。Global hollow nanoparticles of Cu7S4 and Ag2S were prepared by Kirkendall effect using Cu2O and Ag2O nanoparticles as precursors. XRD, TEM and SEM were used to characterize the nanoparticles. The mechanism of the reaction was studied and the easiness of different oxides to react with Na2S solution were discussed in terms of theoretical point of view. The results indicate that the reaction occured from outer part to inner part of precursor nanoparticles. The morphology of the hollow nanoparticles was very similar to that of precursor nanoparticles.

关 键 词：空心 Kirkendall效应 纳米粒子 键能 

分 类 号：O614.121[理学—无机化学] O614.122[理学—化学]