溶剂热法制备银纳米粒子

Solvothermal Synthesis of Silver Nanoparticles

利用混合溶剂,油酸和乙醇组成的有机相,水-乙醇溶液和银离子所组成的水相以及油酸钠固相,在溶剂热条件下,在相界面处还原得到纳米银,其粒径小,胶体稳定,平均粒径为25nm。产物经TEM、XRD和SEM表征,并对银纳米粒子的形成提出了可能的机理。

Preparation of silver nanoparticles by thermal decomposition of precursors.Three phases,liquid(a mixture of oleic acid and ethanol),and solution(a water-ethanol solution containing Ag ions),and sodium oleate spontaneously form in this system.Ethanol in the liquid and solution phases reduces Ag ions at the liquid-solid or solution-solid interfaces.The size of silver nanoparticles is about 25nm.The as-prepared nanomaterials are characterized by XRD,TEM,SEM and their growth mechanism is also briefly investigat...