银纳米颗粒的制备及表征

Preparation and Characterization of Silver Nanoparticle

用鞣酸还原法制得了PVP保护的Ag纳米颗粒,并通过TEM、XRD、TG、DTA及FT IR对其结构进行了表征.结果表明在所选择的实验条件下制备了粒径小、单分散且化学稳定的Ag PVP纳米颗粒,其粒径约10nm,有良好的水分散性.PVP的加入和银氨络离子的形成对制备出小尺寸纳米银起了重要作用.

Silver nanoparticles modified by PVP were synthesized with coordination reduction method at room temperature. The structure and chemical stability of the particles was characterized by TEM、XRD 、TG、DTA、FTIR,etc.The results indicate that the diameter of AgPVP micropheres is about 10nm with a narrow size distribution. It is also found that the AgPVP nanoparticles can be dispersed in water. and have good antioxidation ability in air. The formation of diammine silver ion and the protection of PVP play an important role in the synthesis of monodispersive nanosized silver particles.