纳米锑掺杂氧化锡的制备及表征(英文)

PREPARATION AND CHARACTERIZATION OF ANTIMONY DOPED TIN OXIDE NANOPARTICLES

以无机盐SnCl4·5H2O和SbCl3为初始原料,以乙醇作为溶剂,采用溶胶-凝胶法结合超临界流体干燥(supercritical fluid drying,SCFD)技术制备了纳米锑掺杂氧化锡(antimony doped tin oxide,ATO)粉体。通过热重-差示扫描热分析、X射线衍射、扫描电子显微镜、透射电镜,对前驱体粒子以及ATO粒子的结构进行了分析。探讨了热处理温度、前驱体干燥方式对前驱体以及纳米粒子的形貌、粒径、分散性、晶型、结晶度的影响,并讨论了SCFD技术干燥前驱体的机理。结果表明:采用溶胶-凝胶法结合超临界CO2干燥技术,在给定的反应条件下,能够制得疏松的、良好掺杂的四方型结构的纳米ATO粒子,粒径约15～30nm,分散性好。

SnCl4-5H2O and SbCl3 were used as the initial materials to prepare antimony-doped tin oxide （ATO） nanoparticles by sol,gel method combined with the supercritical fluid drying technique. The microstructure and doping mechanism of the precursor and the ATO particles were investigated by simultaneous thermogravimetry-differential scanning calorimetry, X-ray diffraction, field emission scanning electron microscopy and transmission electron microscopy. The effect of the drying method and the annealing temperature on the morphology, size, dispersion and crystallinity of particles were also investigated. The mechanism of the super- critical CO2 fluid drying on the precursor alcogels was discussed. The results show that the doped ATO particles with a soft agglomerate and a tetragonal phase structure in the size range of 15-30 nm could be obtained.