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在离子液体/水双液相体系中,以双硫腙为萃取剂,将银离子从水相萃取到离子液体相中,在超声辅助条件下将离子液体相中的银离子还原,制备了银/1-丁基-3-甲基咪唑六氟磷酸(Ag/[BMIm]PF6)纳米流体。制得的纳米流体用纳米粒度仪、透射电子显微镜和紫外-可见分光光度计进行了表征,结果表明,银纳米粒子的平均粒度在11nm左右,在离子液体中分布均匀。双硫腙不仅有效地阻止了纳米粒子间的团聚及氧化,而且增强了纳米粒子在离子液体中的可溶性,使得纳米银粒子在离子液体中有良好的分散性和稳定性。
In ionic liquid / water two-liquid system, with dithizone as extractant, the silver ions were extracted from the aqueous phase into the ionic liquid phase, and the silver ions in the ionic liquid phase were reduced under the ultrasound-assisted condition to prepare silver / 1-butyl-3-methylimidazolium hexafluorophosphate (Ag / [BMIm] PF6) nanofluid. The prepared nanofluids were characterized by means of a nano-particle size analyzer, a transmission electron microscope and a UV-visible spectrophotometer. The results showed that the average particle size of the silver nano-particles was about 11 nm and was uniformly distributed in the ionic liquid. Dithizone not only effectively prevents the agglomeration and oxidation of the nanoparticles, but also enhances the solubility of the nanoparticles in the ionic liquid, so that the silver nanoparticles have good dispersibility and stability in the ionic liquid.