氧化锡纳米晶气凝胶制备及其表征  

Synthesis and Characterization of Nano-crystalline SnO_2 Aerogels

作　　者：任洪波[1] 毕于铁[1] 张林[1] 王鲜[1] 

机构地区：[1]中国工程物理研究院激光聚变研究中心,四川绵阳621900

出　　处：《原子能科学技术》2009年第8期700-704,共5页Atomic Energy Science and Technology

基　　金：高温高密度等离子体国家重点实验室基金资助项目(9140C6806020706)

摘　　要：介绍一种低体密度、高表面积、具有纳米量级骨架和晶粒尺寸的块状多孔氧化锡（SnO2）气凝胶的制备方法。场发射扫描电子显微镜（FESEM）表明，气凝胶是由大量纳米粒子堆积而成的三维多孔材料。高分辨透射电子显微镜（HRTEM）表明，气凝胶的骨架粒子由平均粒径为2～3nm的纳米微晶构成。N2吸附表明，气凝胶具有较高的比表面积，约为355．65m^2／g，通过该方法计算出的气凝胶的骨架颗粒粒径为2．4nm，与HRTEM结果吻合较好。Tin（IV） oxide aerogels were synthesized by non-alkoxide sol-gel process and CO2 supercritical drying. The morphology of as-synthesized SnO2 aerogels was evaluated by field-emission scanning electron microscope （FESEM）, which suggests that the skeleton is composed of spherical particles. The high-resolution transmission electron microscopy （HRTEM） reveals that the primary nano-particles are highly crystalline, and the average size of nano-crystal is between 2-3 nm. The N2 adsorption/desorption shows the aerogel has high BET surface area of 355.65 m^2/g. The average skeleton particle size derived from N2 sorption method is about 2.4 nm, which agrees with results from HRTEM resolution.

关 键 词：氧化锡 纳米晶 气凝胶 

分 类 号：O648.1[理学—物理化学]