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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。
In the absence of other surfactants, with the gum arabic as a reducing agent and steric stabilizer, the use of hydrothermal method to prepare silver nanoparticles with good dispersibility. The silver nanoparticles with different morphologies were obtained by adjusting the reaction temperature, mass ratio of Gum and silver nitrate and the reaction time. The products were characterized by UV-Vis, FTIR, TEM, SEM and XRD. The results showed that the reaction temperature and gum arabic played an important role in the preparation of monodispersed silver nanoparticles. When the silver nitrate concentration was 10 mmol / L, the mass ratio of gum arabic to silver nitrate was 1: 1, the reaction temperature was 160 ° C , The reaction time is 3 h, we can get a good dispersion of quasi-spherical silver nanoparticles.