Monitoring the growth of polyoxomolybdate nanoparticles in suspension by flow field-flow fractionation
Monitoring the growth of polyoxomolybdate nanoparticles in suspension by flow field-flow fractionation
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DOI：
10.1021/ja045067r
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发表时间：
2005-03-30
影响因子：
15
通讯作者：
Selegue, JP
中科院分区：
文献类型：
--
作者：
Chen, BL;Jiang, HJ;Selegue, JP
采用流场-流分馏（FlFFF）技术对keplerate (NH4)42[MoVI72MoV60O372(CH3CO2)30(H2O)72]·ca.·300H2O·ca.·10CH3CO2NH4（{Mo132}）悬浮液中多氧钼酸盐纳米颗粒的演化过程进行了跟踪研究，监测了原位粒径分布、原子力和高分辨率透射电子显微镜（AFM、SEM和HRTEM）对粒径的确定。电感耦合等离子体发射光谱法（ICP-OES）测定flfff分离组分的Mo含量，紫外/可见光谱法确定悬浮液中的物质。我们观察了悬浮中3−75 nm多氧钼酸盐颗粒的形成和{Mo132}晶体的动态生长。
We follow the evolution of polyoxomolybdate nanoparticles in suspensions derived from the keplerate (NH4)42[MoVI72MoV60O372(CH3CO2)30(H2O)72]·ca.·300H2O·ca.·10CH3CO2NH4({Mo132}) by flow field-flow fractionation (FlFFF) to monitor the particle-size distribution in situ, atomic force and high-resolution transmission electron microscopy (AFM, SEM, and HRTEM) to confirm particle sizes, inductively coupled plasma-optical emission spectrometry (ICP-OES) to determine the Mo content of the FlFFF-separated fractions, and UV/visible spectroscopy to confirm the identity of the species in suspension. We observe the formation of 3−75-nm polyoxomolybdate particles in suspension and the dynamic growth of {Mo132} crystals.