摘要
180℃下,醋酸镍为前驱体,溶解在1,2-丙二醇溶剂中,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XRD,TEM和Foruier红外光谱(FTIR)对纳米镍进行了表征．结果表明,修饰剂的结构对纳米镍的粒径大小、粒径分布及形貌的影响很大．修饰剂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．并对修饰剂的作用机理进行了讨论．
Size- and shape-controlled Ni nanoparticles were synthesized using nickel acetate as precursor, 1, 2-propanediol as solvent and reducing agent, sodium hydroxide as pH adjusting agents, and surfactants PEG （polyethylene glycols） and SDS （sodium dodecyl sulfate） as modifiers. The asprepared Ni nanoparticles were characterized by TEM, XRD and Fourier transform infrared （FTIR） spectroscopy. The presence of modifiers is crucial for the synthesis of size- and shape-controlled phase pure Ni nanoparticles. The modification effects of single modifiers such as PEGs and SDS, and their composites were investigated and analyzed. Among single modifiers, the PEG-200 or PEG- 600 is beneficial to fabricating irregular snowflake-like crystals, PEG-2000 beneficial to synthesizing dodecahedra crystals, PEG-6000 beneficial to synthesizing triangular crystals, and SDS beneficial to fabricating dodecahedra crystals and irregular snowflake-like crystals with smaller average particle size. Among the composite modifiers, coexisting of SDS and PEG-600 or PEG-6000 is beneficial to fabricating irregular snowflake-like crystals with bigger average particle size. The effects of the modifiers play an important role in the synthesis of Ni nanoparticles certified by FTIR spectroscopy.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
2006年第4期383-388,共6页
Acta Metallurgica Sinica
基金
江苏省新产品基金资助项目200470
关键词
液相还原法
纳米镍
聚乙二醇
十二烷基硫酸钠
liquid phase reduction method, nickel nanoparticle, polyethylene glycol （PEG）,soidum dodecyl sulfate （SDS）
