球状和低轴比棒状碳酸钡纳米微粒的制备

Preparation for Spherical and Low Axis Ratio Rodlike Barium Carbonate Nanoparticles

测定了TritonX - 10 0 -n C6H13 OH(简称T/H)、Ba(NO3 ) 2 水溶液和c C6H12 组成体系的稳定水 /油 (W/O)微乳液相区域 ,采用该微乳液体系制备碳酸钡纳米微粒 ,研究了影响碳酸钡微粒形态和大小的因素 ,并用透射电子显微镜 (TEM )、X射线衍射 (XRD)和差热分析 (DTA)手段对所得样品进行表征 .结果表明所得样品是由α- BaCO3 组成的纳米材料 ,通过调控Ba(NO3 ) 2 水溶液的浓度和 pH值 ,可以获得球状、小轴比棒状的碳酸钡纳米微粒 .

The stable water/oil(W/O) microemulsion phase diagrams for the system of Triton X-100-n-C_6H_ 13OH(T/H)/c-C_6H_ 12/barium nitrate aqueous solution were determined,and barium carbonate nanoparticles were prepared in the W/O microemulsion system.The factors which influence the shapes and sizes of barium carbonate particles were investigated,and the samples were characterized by means of transmission electron microscopy (TEM),X-ray diffraction (XRD),and differential thermal analysis (DTA).The results show the resulting samples are nanomaterials consisting of α-BaCO_3 nanoparticles.By adjusting the concentration,pH value of barium nitrate aqueous solution,and barium carbonate nanoparticles whose shapes are spherical,rodlike with different axis ratio can be prepared respectively.