铂纳米花的控制合成  

Controlled Synthesis of Platinum Nano-Flowers

作　　者：李甘[1] 朱海[1] 池泉[1] 赵燕熹[1] 刘汉范[1] 黄涛[1] 

机构地区：[1]中南民族大学催化材料科学湖北省暨国家民委-教育部重点实验室,湖北武汉430074

出　　处：《化学与生物工程》2012年第5期19-21,30,共4页Chemistry & Bioengineering

基　　金：国家自然科学基金资助项目(20673146)

摘　　要：以氯铂酸钾(K2PtCl6)为前驱体、聚乙烯吡咯烷酮(PVP)为稳定剂及还原剂,在一定量溴化钾(KBr)的存在下,采用水热法制备了铂纳米花。考察了n(K2PtCl6)∶n(PVP)∶n(KBr)、反应温度、反应时间对产物形貌的影响。结果表明,在n(K2PtCl6)∶n(PVP)∶n(KBr)为1∶10∶15、反应温度为130℃、反应时间为3h的条件下,制备出形貌规则、大小均匀的花形自组装铂纳米颗粒。利用透射电子显微镜、X-射线光电子能谱和X-射线粉末衍射对产物进行了表征。所制备的铂纳米花由零价态的铂原子组成,具有面心立方(fcc)结构。Platinum nano-flowers were synthesized with potassium hexachloroplatinate as precursor,polyvinylpyrrolidone（PVP） as both stabilizer and reducing agent by means of hydrothermal method.The effects of n（K2PtCl6）∶n（PVP）∶n（KBr）,reaction temperature and reaction time on the shape of the products were investigated.Uniform and well-defined flower-like platinum nanoparticles were obtained under conditions as follows：n（K2PtCl6）∶n（PVP）∶n（KBr） 1∶10∶15,reaction temperature 130 ℃,reaction time 3 h.The as-prepared platinum nanoparticles were characterized by transmission electron microscopy（TEM）,X-ray photoelectron spectroscopy（XPS） and X-ray powder diffraction（XRD）.The platinum nano-flowers with the fcc structure were composed of the zero-valence platinum atoms.

关 键 词：铂 纳米花 氯铂酸钾 水热法 聚乙烯吡咯烷酮 

分 类 号：O614.823[理学—无机化学] TB383[理学—化学]