Keggin结构多金属氧酸盐纳米微粒的室温固相合成与表征  

Preparation of Polyoxometalate Nanoparticles with Keggin Structure by Solid-State Reaction at Room Temperature

作　　者：石晓波[1] 王赛英[1] 李春根[1] 汪德先[1] 

机构地区：[1]江西师范大学化学学院,江西南昌330027

出　　处：《江西师范大学学报（自然科学版）》2003年第2期148-151,共4页Journal of Jiangxi Normal University(Natural Science Edition)

基　　金：国家自然科学基金资助项目(20261003)

摘　　要：采用室温固相反应法合成了钨磷酸铵、钼磷酸铵两种多金属氧酸盐纳米微粒,用元素分析确定其分子组成,它们的结构、性质、颗粒大小、表面形状分别用红外光谱、X-射线粉末衍射、透射电镜和热分析等手段进行了研究.结果表明:两种多金属氧酸盐都为Keggin结构,晶粒大小分别在32nm和34nm左右,形成纳米微粒后,两种杂多阴离子的热稳定性均明显降低.The polyoxometate particles,(NH4)3PW12O40·9H2O and (NH4)3PMo12O40·7H2O were synthesized by solid-state reaction at room temperature. Their structure, particle size, thermal properties and surface nature were characterized with elemental analyses, IR, XRD, TEM and TG-DTA techniques. The results show that these two polyoxometate particles have the same Keggin structure and the size is about 32 nm and 34 nm. Their stability of the hetoropoly anion decreased when nanoparticles were formed.

关 键 词：KEGGIN结构 多金属氧酸盐纳米微粒 室温固相反应法 合成 结构表征 性质表征 热稳定性 

分 类 号：TB383[一般工业技术—材料科学与工程]