摘要
Finely divided silver nanoparticles were synthesized via the hydrothermal method. Arabic gum （AG） was used as both the reductant and steric stabilizer without any other surfactant. By adjusting the reaction temperature, mass ratio of AG to AgNO3, and reaction time, silver nanoparticles with different morphological characteristics could be obtained. The products were characterized by UV-Vis, FTIR, TEM, SEM, and XRD measurements. It was found that temperature and AG played an important role in the synthesis of mono-disperse silver nanoparticles. Well dispersed and quasispherical silver nanoparticles were obtained under the optimal synthesis conditions of 10 mmol/L AgNO3, m（AG）/m（AgN03）= l：1, 160 ℃ and 3 h.
在无其他表面活性剂的条件下,以阿拉伯树胶作为还原剂和位阻稳定剂,应用水热法制备具有良好分散性的银纳米颗粒。通过调节反应温度、阿拉伯树胶与硝酸银的质量比和反应时间,可以得到不同形貌的银纳米颗粒;采用UV-Vis、FTIR、TEM、SEM和XRD对反应所得产物进行表征。结果表明,反应温度和阿拉伯树胶在制备单分散银纳米颗粒过程中起重要作用;当硝酸银浓度为10 mmol/L、阿拉伯树胶和硝酸银的质量比为1:1、反应温度为160°C、反应时间为3 h时,可以得到分散性良好的准球形银纳米颗粒。
