PVP水溶液中纳米Pd粒子的生长过程及形貌控制  

Growth process and morphology control of palladium nanoparticles in PVP aqueous solution

作　　者：王艳丽[1] 谭德新[2] 张明旭[1] 徐国财[2] 徐初阳[1] 李本侠[1] 

机构地区：[1]安徽理工大学材料科学与工程学院,安徽淮南232001 [2]安徽理工大学化学工程学院,安徽淮南232001

出　　处：《功能材料》2010年第5期895-898,共4页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(50474056);安徽省高校自然科学基金资助项目(KJ2009B054;KJ2009B120Z)

摘　　要：在微量聚乙烯吡咯烷酮(PVP)存在下,超声还原氯化钯水溶液,合成纳米Pd粒子,利用透射电镜、紫外-可见吸收光谱、X射线光电子能谱等技术对纳米Pd粒子的生长过程进行了研究。考察了PVP用量对纳米粒子形貌的影响。结果表明,当PVP与PdCl2的质量比为10∶1、超声反应50min时,得到规则的单分散球型纳米Pd粒子,粒径大约8nm左右。根据紫外-可见特征吸收波峰和X射线光电子能谱中结合能的变化,提出了纳米粒子的稳定分散是借助于纳米Pd与PVP之间的配位作用来实现的。Palladium nanoparticles were prepared by ultrasonic in the palladium（Ⅱ） chloride aqueous solution by the addition of a small quantity of poly（vinylpyrrolidone） （PVP）.The growth process of palladium nanoparticles were studied by transmission electron microscopy （TEM）,ultraviolet-visible（UV-Vis） spectroscopy and X-ray photoelectron spectrum （XPS）.The effect of amount of PVP on the growth morphology of palladium nanoparticles was also investigated.The monodispersed palladium nanoparticles with spherical shape and a uniform diameter of 8nm were obtained when the mass ratio of PVP/PdCl2 was 10：1 and the reaction time was 50min.The stable dispersion of nanoparticles was attributed to the coordination between PVP and palladium,which was verified by the analysis of XPS and UV-Vis.

关 键 词：聚乙烯吡咯烷酮 纳米Pd粒子 生长过程 形貌 超声 

分 类 号：O614.82[理学—无机化学]