纳米二氧化锡粉体的超重力-水热法制备与表征

以SnCl₄·5H₂O和氨水为原料，用超重力-水热法制备了纳米SnO₂粉体。利用X射线衍射(XRD)、透射电镜(TEM)、高分辨透射电镜(HRTEM)和物理吸附仪(BET)等分析手段对其进行表征。考察了反应物浓度、反应温度和陈化时间等实验条件对纳米SnO₂粉体的晶体结构、粒度及分散性的影响。结果表明，在SnO₂溶液浓度为0.05mol/L、水热温度240～280℃以及陈化时间3～8h得到的粉体结晶性良好、比表面积大(90～170m²/g)、粉体的颗粒大小在2～6nm左右，并具有良好的分散性。

Synthesis and characterization of nanosized tin oxide powder by high-gravity & hydrothermal synthesis

SnO₂ nanocrystals have been prepared by high-gravity precipitation followed by hydrothermal aging, using SnCl₄·5H₂O and ammonia as the starting materials. The structure and particle size of SnO₂ were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), and high resolution transmission electron microscopy (HRTEM). The influence of varying the thermal hydrolys is temperature, reactant concentrations and hydrothermal aging time on the crystal structure, morphology and particle size are discussed. The SnO₂ powder was shown to exhibit good crystallinity with a particle size of 2-6nm, high specific surface area (90-170m²/g) and good dispersibility. The optimized conditions were found to be thermal hydrolysis temperature 240-280℃, reactant concentration (SnCl₄) 0.05mol/L and hydrothermal aging time 3-8h.