纳米二氧化锡粉体的超重力-水热法制备与表征  

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

作　　者：李振昊[1] 乐园[1] 郭奋[1] 陈建峰[1] 

机构地区：[1]北京化工大学纳米材料先进制备技术与应用科学教育部重点实验室,北京100029

出　　处：《北京化工大学学报（自然科学版）》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)

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.

关 键 词：SNO2 分散性 超重力 水热法 

分 类 号：TB383[一般工业技术—材料科学与工程]