反应条件对乳液法自组装合成氧化锰纳米粒子结构、形貌和尺寸的影响  

Effects of Reaction Conditions on the Structure,Morphology and Size of Manganese Oxide Nanoparticles

作　　者：朱家艺[1,2] 贺军辉[1] 

机构地区：[1]中国科学院理化技术研究所功能纳米材料实验室,北京100190 [2]中国科学院研究生院,北京100049

出　　处：《化学学报》2010年第10期961-968,共8页Acta Chimica Sinica

基　　金：国家自然科学基金(Nos.20871118;10776034)资助项目

摘　　要：通过改变反应物物质的量比、分散相与连续相体积比、反应体系温度和煅烧后处理温度,研究了反应条件对乳液法自组装合成氧化锰纳米粒子结构、形貌和尺寸的影响.结果表明:当高锰酸钾与油酸物质的量比在1∶5～1∶1之间时,形成蜂窝状纳米粒子和空心纳米粒子;当分散相(油酸)与连续相(水)的体积比为4∶200时,形成良好的空心球纳米结构;反应体系温度升高不利于产物的洗涤;不同温度的煅烧后处理不仅影响氧化锰纳米粒子的形貌,而且影响其结晶度和晶型.Effects of reaction conditions on the structure,morphology and size of manganese oxide nanoparticles were studied by changing the reactant molar ratio,the volume ratio of dispersed phase/continuous phase,the reaction temperature and the post-calcination temperature in their emulsion self-assembly synthesis. The results showed that honeycomb and hollow nanoparticles were obtained in the KMnO4/oleic acid molar ratio range of 1∶5～1∶1. When the volume ratio of dispersed phase （oleic acid）/continuous phase （water） was 4∶200,spherical hollow nanospheres were produced. The increase of reaction temperature was unfavorable to the rinsing of product. Post-calcination at varied temperatures not only influenced the product morphology,but their crystalinity and crystal structure as well.

关 键 词：氧化锰 纳米粒子 自组装 空心纳米结构 蜂窝纳米结构 

分 类 号：TB383.1[一般工业技术—材料科学与工程]