作　　者： ; ;

机构地区： 广州医科大学

出　　处： 《广州化工》 2020年第9期66-68,150,共4页

摘　　要： 以硝酸银为反应原料,柠檬酸钠为还原剂,聚乙烯吡咯烷酮为保护剂,用水热法制备出纳米银颗粒。通过研究在柠檬酸钠不同浓度的条件下,对纳米银形貌形成的影响,从而达到还原剂浓度的优选。利用透射电子显微镜等对实验所得纳米银的结构形态及稳定性等进行表征。实验结果表明在AgNO 3浓度为0.1 mol/L,PVP为10 mg/mL,柠檬酸钠为0.15 mol/L,反应温度为100℃,反应时间为2 h的条件下可得到平均粒径约30 nm、分散性良好、尺寸均一的近球形纳米银颗粒。 Silver nanoparticles were prepared by hydrothermal method with AgNO 3 and sodium citrate as raw materials and polyvinyl pyrrolidone as protecting agent.The effects of concentration of sodium citrate on the morphologies of silver nanoparticles were studied.The structure,size and morphology were characterized by transmission electron microscopy and other techniques.The results indicated that when the concentrations of AgNO 3,PVP and sodium citrate were 0.1 mol/L,10 mg/mL and 0.15 mol/L,and the reaction lasted 2 h at 100℃,near-spherical silver nanoparticles with 30 nm-uniformly size and good dispersion could be obtained.

关 键 词： 水热法 纳米银 条件优选 性能表征

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