OALib Journal期刊
ISSN: 2333-9721
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修饰剂对液相还原法制备的纳米镍粒子形貌与尺寸的影响
, PP. 383-388
Keywords: 液相还原法,纳米镍,聚乙二醇,十二烷基硫酸
Abstract:
180℃下,醋酸镍为前驱体,在1,2-丙二醇溶液中,以溶剂自身为还原剂,加入适量的修饰剂,如聚乙二醇系列(PEG-200、PEG-600、PEG-2000和PEG-6000)和十二烷基硫酸钠(SDS),进行了粒径、形貌可控的纳米镍的合成。通过X-射线衍射(XRD)、透射电子显微镜(TEM)、选区电子衍射(SAED)和傅立叶红外(FTIR)对纳米镍进行了表征。修饰剂的结构对纳米镍的粒径大小、粒径分布、形貌的影响很大。各修饰剂对纳米Ni形貌的影响为PEG-200与PEG-600易于形成雪花状晶体,PEG-2000易于形成十二面体晶体,PEG-6000易于形成三角形薄片,SDS易于形成粒径较小的雪花状晶体和十二面晶体,PEG–600、PEG-6000与SDS复配后易于形成粒径较大的雪花状晶体。并初步解释了修饰剂的作用机理,其原因可归纳为静电效应和位阻效应。
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