水热合成不同形貌纳米银  

Synthesis of Silver Nanoparticles with Different Shape by Hydrothermal Process

作　　者：肖旺钏[1] 林梅[1] 赖文忠[1] 王仁章[1] 张丽华[1] 

机构地区：[1]三明学院资源与化工学院,福建三明365004

出　　处：《三明学院学报》2013年第6期1-4,共4页Journal of Sanming University

基　　金：国家自然科学基金项目(51302151);福建省自然基金项目(2012D123;2012D124);福建省教育厅科技项目(JA12299);福建省大学生创新实验项目(ZL1224/CS)

摘　　要：以聚乙烯吡咯烷酮为分散稳定剂,硼氢化钠和柠檬酸三钠为还原剂,水热法制备了不同形貌和粒径的纳米银。透射电镜分析表明,改变反应温度可以调控纳米银颗粒的形貌,改变反应时间可以调控纳米银颗粒的粒径大小。控制反应温度140℃以下,得到多种形貌共存的纳米银,140℃以上得到单一的球形纳米银;固定反应温度130℃,得到三角形的纳米银,延长反应时间,形貌无明显变化,粒径增加。Silver nanopartieles with different shapes and size were synthesized by hydrothermal process in the presence of sodium borohydride and sodium citrate as reductant and polyvinylpyrrolidone as stabilizer. TEM analysis indicated that the morphology and size of silver nanopartilces earl be tuned by changing reaction temperature and time respectively. Silver nanoparticles exist mainly as ball-like above 140 ℃ and several morphology coexist below 140 ℃. Triangular silver nanopartieles are prepared by fixed temperature at 130 ℃ and the morphology remains unchanged and the size increases with the increase of reaction time.

关 键 词：水热合成 纳米银 形貌控制 

分 类 号：TQ424.25[化学工程]