过渡金属钼钒砷酸盐纳米微粒的固相合成与表征  

Solid state synthesis and characteristies of transition metal molybdovanadoarsenic nanoparticles

作　　者：石晓波[1] 李春根[2] 汪德先[2] 傅海萍[2] 

机构地区：[1]湛江师范学院化学系,广东湛江524048 [2]江西师范大学化学学院,江西南昌330027

出　　处：《化学研究与应用》2004年第5期619-622,共4页Chemical Research and Application

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通式为H3MAsMo10V2O40·xH2O(M=Co2+、Ni2+、Cu2+、Zn2+)的四种过渡金属钼钒砷酸盐纳米微粒。通过元素分析、IR、UV、XRD、TEM、TG DTA、TPR等测试手段对其组成、结构、颗粒大小、热稳定性以及表面性能进行了表征。结果表明:四种多金属氧酸盐均为Keggin结构的纳米微粒,晶粒大小约为25～36nm,形成纳米微粒后,表现出明显量子尺寸效应,热稳定性下降,表面活性增大。Four kinds of polyoxometate particles were synthesized by solid-state reaction of H_5AsMo_(10)V_2O_(40)·xH_2O with M(Ac)_2·xH_2O(M=Co^(2+),Ni^(2+),Cu^(2+),Zn^(2+))at room temperature.Their general molecular formula were characterized with elemental analysis,IR,UV,XRD,TEM,TG-DTA and TPR techniques.The results show that these four polyoxometate particles have the same Keggin structure and the size are 25～36 nm.Their stability of the hetoropoly anion decreased,and surface activity increased apparently,when nanoparticles were formed.

关 键 词：纳米微粒 多金属氧酸盐 KEGGIN结构 固相反应 

分 类 号：O611.4[理学—无机化学]