特殊微结构纳米级α-MoO_3的制备  

PREPARATION OF NANO-SIZED α-MoO_3 WITH SPECIAL MICROSTRUCTURE

作　　者：赵延霞[1,2] 刘珊[1] 郝青青[1] 刘昭铁[1] 吕剑[1] 刘忠文[1] 

机构地区：[1]应用表面与胶体化学教育部重点实验室,陕西师范大学化学与材料科学学院,陕西西安710062 [2]延安职业技术学院化学化工系,陕西延安716000

出　　处：《中国钼业》2010年第3期28-32,共5页China Molybdenum Industry

基　　金：教育部留学回国人员科研启动金资助项目

摘　　要：以七钼酸铵为钼源,采用水热晶化的方法制备了具有特殊微结构的MoO3微粉。分别考察了溶液pH值、老化温度、焙烧温度、加入模板剂等因素对MoO3晶粒尺寸、形貌的影响。XRD结果表明所合成产物为纳米级α-MoO3。扫描电镜观察发现,α-MoO3及其前驱体表现为片状、纤维状、棒状等聚集形貌特征。获得了α-MoO3及其前驱体晶粒尺寸和形貌特征与制备条件之间的一些规律。The MoO3 powder with special microstructure molybdate tetrahydrate as a molybdenum precursor. The was hydrothermally synthesized by using ammonium heptacrystal size and morphology of MoO3 were investigated under various synthetic conditions such as ageing temperature, solution pH, calcination temperature, and the addition of templates. The XRD characterizations confirmed the formation of nano - sized α - MoO3 under different synthetic conditions. The agglomerated forms of α - MoO3 and its precursors, e. g. , flakes, fibers, and rods, etc. , were found from the SEM observations. The crystal size and morphology of α - MoO3 and its precursors were correlated with the preparation conditions.

关 键 词：α-MoO3 七钼酸铵 水热合成 

分 类 号：TQ136.12[化学工程—无机化工]