氯化胆碱离子液体中纳米银的电化学制备与表征

Electrochemical Preparation and Characterization of Ag Nanoparticles in Choline Chloride Based Ionic Liquid

在氯化胆碱离子液体中,采用牺牲阳极法直接从金属银制备了纳米银微粒;利用X射线衍射仪、透射电子显微镜、傅立叶红外光谱和热分析仪对样品进行了分析表征.结果表明:所制备的银纳米微粒大致呈球形,具有面心立方结构,粒径约为60nm.作为溶剂的离子液体同时具有分散剂和稳定剂的功能,可防止银纳米微粒之间的团聚及表面氧化.

Ag nanoparticles were prepared via electrochemical route by using silver as sacrificial anode in choline chloride based ionic liquid. The as-prepared Ag nanoparticles were characterized by means of X-ray powder diffraction, transmission electron microscopy, thermal analysis, and Fourier transformation infrared spectrometry. Results indicate that the as-prepared Ag nanoparticles with a size of about 60 nm are spherical-shaped and have cubic crystalline structure. The ionic liquid as the electrolyte and solvent also functions as a dispersant and stabilizer to prevent the reunion and surface oxidation of the Ag nanoparticles.