摘要
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0.05 mol/L、水热温度240-280℃以及陈化时间3-8 h得到的粉体结晶性良好、比表面积大（90-170 m^2/g）、粉体的颗粒大小在2-6 nm左右，并具有良好的分散性。
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 hydrolysis 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 - 6 nm, high specific surface area （90- 170 m^2/g） and good dispersibility. The optimized conditions were found to be thermal hydrolysis temperature 240- 280℃, reactant concentration （SnCl4） 0.05 mol/L and hydrothermal aging time 3- 8 h.
出处
《北京化工大学学报（自然科学版）》
CAS
CSCD
北大核心
2007年第4期354-357,共4页
Journal of Beijing University of Chemical Technology(Natural Science Edition)
基金
国家自然科学杰出青年基金(20325621)
关键词
SNO2
分散性
超重力
水热法
tin oxide
dispersibility
high-gravity
hydrothermal synthesis
