萃取还原法制备离子液体基银纳米流体  

Preparation of ionic liquid-based nanofluids containing silver nanoparticles by extraction-reduction method

作　　者：丁素芳[1] 张程[1] 汪燕鸣[1] 吕雪[1] 

机构地区：[1]淮北师范大学化学与材料科学学院,安徽淮北235000

出　　处：《现代化工》2013年第8期83-85,87,共4页Modern Chemical Industry

基　　金：安徽省高等学校省级自然科学研究项目(KJ2010A305);安徽省科技厅自然科学基金项目(11040606M42)

摘　　要：在1-(2-羟基乙基)-3-甲基咪唑六氟磷酸/硫酸铵双水相体系中,以双硫腙为萃取剂,将水相中的银离子萃取到离子液体相中。在超声辅助条件下通过对离子液体相中银离子的还原,制备了在亲水性离子液体中稳定的纳米银流体。用纳米粒度仪、透射电子显微镜对该流体进行表征,结果表明,纳米银微粒的平均粒度在29 nm左右,在离子液体中分布均匀。红外光谱分析结果表明,双硫腙与纳米银微粒之间存在一定的化学键作用,双硫腙对纳米银起到表面修饰的作用,这使得纳米银微粒在离子液体中有良好的分散性和稳定性。In aqueous two-phase systems,the Ag ＋ is extracted from （NH4）SO4 solution to 1-（2-hydroxyethyl）-3-methyl imidazolium hexafluorophosphate by the extractant diphenylthiocarbazone.The hydrophilic ionic liquid based nanofluids containing silver nanoparticles can be prepared by the ultrasound-assisted reduction of Ag ＋ in ionic liquid phase.The nanofluids is characterized by nano-particle size analyzer and polarizing microscope.The result shows that the mean diameter of the nanoparticles is about 29 nm and the nanoparticles are distributed evenly throughout the ionic liquid.The IR spectra indicates that there is chemical bond interaction between silver and diphenylthiocarbazone,which contributes to the dispersion and the stability of silver nanoparticles in the ionic liquid solvent.

关 键 词：离子液体 纳米银 萃取 还原 纳米流体 

分 类 号：TQ028[化学工程]