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对十六烷基三甲基溴化铵 (CTAB) -正辛醇 -环己烷 -H2 O微乳体系相行为进行了研究。采用分光光度计测量了表观稳定的微乳体系的吸光度的变化 ;然后采用 3种CTAB与正辛醇配比的微乳体系在 30℃下制备出了Pt纳米微粒 ,还原剂为水合肼。经透射电镜分析得出 :溶水量较大的微乳体系可以制备出粒径较小 (d =3nm)且分布极为均匀的铂纳米微粒
The phase behavior of cetyltrimethylammonium bromide (CTAB) -n-octanol-cyclohexane-H2O microemulsion system was studied. The change of absorbance of the apparently stable microemulsion system was measured by spectrophotometer. Then, Pt nano-particles were prepared at 30 ℃ by using three microemulsion systems with CTAB and n-octanol ratio, and the reducing agent was hydrazine hydrate. The results of transmission electron microscopy showed that the microemulsion system with larger amount of water can prepare platinum nanoparticles with smaller size (d = 3nm) and extremely uniform distribution