微乳液法合成棒状纳米Ni

Preparation of nanorods Ni by microemulsion system

在25℃时,作出SDS/正丁醇/正庚烷/水体系中SDS和正丁醇质量比为1∶1时的拟三元相图,用电导率曲线讨论了该体系由W/O型→双连续型→棒状液晶→层状液晶→双连续型→O/W型的微观结构转变.并在70℃时,以棒状液晶结构的微乳液为反应模板,用水合肼为还原剂还原NiCl2,合成出棒状纳米Ni.TEM研究表明,棒的直径处于20～30nm,长度为150～250nm,长径比为7～10.合成结果表明,通过控制反应模板的结构,可以有效地合成特定形状的纳米粒子.

The phase diagram and the structure change of W/O→bi-continuous structure→virgulate liquid crystals→lamellar liquid erystals→bi-continuous structure→O/W studied by conductivity measurement were established for this system at 25℃. And the Ni nanorods were prepared by reduction of NiCl2 with hydrazine in the virgulate liquid crystals microemulsion as colloidal chemical template at 70 ℃. Nickel nanorods with a diameter of 20 -30 nm,a length of 150 -250 nm and the ratio of length to diameter of 7 - 10 have been observed by TEM images. The results indicate that the nanoparticles with special shape will be produced by controlling the structure of template.