Solvothermal synthesis of grain size controlled nanocrystalline SnO2

• Published in: Transactions of Nonferrous Metals Society of China Vol. 16; no. A02; pp. 269 - 272
• Main Author: 徐刚 徐盛明 陈崧哲 吴芳 李林艳
• Format: Journal Article
• Language: English
• Published: Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China 01.09.2006
• Subjects: SnO2; 二氧化锡; 溶剂热合成法; 粒度控制; 纳米晶材料; SnO2; solvothermal synthesis,nanocrystalline particle
• ISSN: 1003-6326

Uniform nanocrystalline SnO2 with different particle sizes was prepared by a solvothermal method using SnCl4·5H2O as the starting material and ethanol as the solvent in the presence of different concentrations of HCl or KOH. The as-prepared powders were characterized by X-ray diffraction（XRD）, transmission electron microscopy（TEM）, thermo-gravimetry and differential thermal analysis（TG-DTA）, and nitrogen BET measurements. With increasing alkalinity of the precursor solution, the crystallite size of the as-prepared SnO2 nanocrystals decreases from 7.1 nm to 3.2 nm, while the specific surface area of the as-prepared powders increases from 101 m^2/g to 195 m^2/g. When calcined at 500 ℃ for 2 h in air, the crystallite size of the as-calcined powders increases slightly （12-5.9 nm） and the specific surface area of the as-calcined powders is 42-63 m2/g.