肼还原法制备镍纳米粒子及其机理  

Synthesis and formation mechanism of nickel nanoparticles by hydrazine reduction

作　　者：胡爱平[1] 唐元洪[1] 彭坤[1] 罗小兰[1] 朱文海[1] 

机构地区：[1]湖南大学材料科学与工程学院,湖南长沙410082

出　　处：《中南大学学报（自然科学版）》2007年第6期1063-1066,共4页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(50501008)

摘　　要：在乙二醇中用肼作还原剂还原Ni2+制备镍纳米粒子。用X射线衍射仪测定出产物的相结构,用扫描电子显微镜观察产物的微观结构。根据反应现象和产物的相结构,研究温度、pH值调节剂种类和pH值对镍纳米粒子形成的影响,并推断其形成机理。研究结果表明,用肼作还原剂还原Ni2+制备纳米Ni的最佳反应温度为60℃,用NaOH作pH值调节剂调pH值到10～11得到的镍纳米粒子为体心立方结构,平均粒径为25nm。在Ni纳米粒子的形成过程中,NaOH不仅起到调节pH值的作用,还起催化作用。Nickel nanoparticles were obtained by hydrazine reduction of nickel chloride in ethylene glycol in an air atmosphere. The resultant particles were characterized by X-ray diffractometer and scanning electron microscope. The effects of temperature and alkalinity on the reaction were studied. The results show that the optimal conditions are as follows： temperature of 60 ~C, and NaOH as pH value adjusting reagents, pH value of 10--ll. Under the optimal conditions, the resultant particles is pure crystalline nickel with an face centered cubic （fcc） structure and mean diameter of about 25 nm. According to the experiment phenomena in the process of reaction and the phase structure of resultant particles, it can be concluded that the reaction can be carried out due to NaOH as catalyst and pH adjusting reagent.

关 键 词：Ni纳米粒子 肼 合成 形成机理 

分 类 号：O781[理学—晶体学] TN304.3[电子电信—物理电子学]