CTAB微乳液的稳定条件和普鲁士蓝类纳米粒子的制备

Stabilization Conditions of CTAB Microemulsion System and Preparation of Prussian BlueAnalogues Nanoparticles

利用浊度法确定相点并绘制十六烷基三甲基溴化铵(CTAB)/正丁醇/异辛烷/铁氰化钾水溶液四组分体系反相微乳区拟三元相图,考察了CTAB与正丁醇的质量比对微乳体系稳定区域的影响,并制备出Fe-Co普鲁士蓝类配合物纳米材料。结果表明,当m(CTAB)︰m(正丁醇)=1︰1,体系有较大的反相微乳区。在此条件下,选取m(CTAB+正丁醇)︰m(异辛烷)=1︰1,将0.1 mol/L的铁氰化钾微乳液与氯化钴微乳液混合搅拌4 h制备出Co-Fe普鲁士蓝类配合物纳米材料,并用X射线衍射仪(XRD)和透射电镜(TEM)对产品进行表征。

Pseudo-temary phase diagrams of reverse microemulsion system of cetyl trimethyl ammonium bromide （CTAB）, n-butanol, iso-octane and K3Fe（CN）6 solution were studied by turbidimetry. The effect of the mass ratio of CTAB to n-butanol on the stability of the reverse microemulsion system was investigated. Prussian blue analogues were prepared under optimal conditions determined from the phase diagrams of the microemulsion systems. The results show that the ratio of surfactant aid to surfactant is a significant factor to affect the stability of the microemulsion system. When the mass ratio of m （CTAB） and m （n-butanol） is 1︰1, the microemulsion phase region of the reverse microemulsion system that exists stably is the biggest. Under the optimal condition, when the ratio of m （CTAB＋n-butanol）：m （iso-octane） is 1︰1, Prussian blue analogues can be prepared through the reaction of reverse microemulsion of K3Fe（CN）6 solution（0.1 mol/L） and CoCl2 （0.1 mol/L） reverse microemulsion at 25 ℃ for 4 h. The products can be characterized by XRD and TEM.