【摘要】 寻求镍纳米颗粒制备的有效方法及反应条件.以钯纳米颗粒为晶种制备出了镍纳米颗粒,并对影响镍纳米颗粒制备的各种因素即温度、浓度、PVP、Pd和水合肼等进行了探索.结果表明:当摩尔比nPd∶nN i2+=1∶40时,反应时间仅用20m in,nPVP∶nN i2+=40∶1时,PVP对镍纳米胶体的稳定效果最好,14 d之内不会聚沉,镍纳米颗粒的平均粒径约13nm,远小于不用钯纳米颗粒为晶种所制得的镍纳米颗粒粒径(约40nm).以紫外-可见光谱表征反应进程,TEM表征经无水乙醇稀释后的胶体形貌,XPS表征元素化合价以及XRD表征其晶形.更多还原

【Abstract】 The primary target of the work is studying the effective methods and reaction condition of nickel nanoparticles preparation.Using palladium as nucleus,nickel nanoparticles are prepared.Furthermore,some factors which can influence the preparation of nickel nanoparticles are studied,such as temperature,concentration,the amount of Pd,hydrazine and PVP etc.The experiments indicate that the reaction time is just 20min when the molar ratio n_Pd ∶n_Ni²⁺ is 1∶40.The protective agent PVP can stabilize the nickel colloid two weeks effectively under the condition of the molar ratio n_PVP∶n_Ni²⁺ =40∶1.The mean size of the nickel nanoparticles is 13nm,which is less than greatly that（about 40nm） of without palladium nucleus.The process of the reaction is characterized by UV-vis spectroscopy;the product was investigated by Xray diffraction（XRD）,transmission electron microscopy（TEM） and X-ray photoelectron spectroscopy（XPS）.更多还原