Nd-doped SnO_2:characterization and its gas sensing property

• 作 者: 吴诗德 李超 魏伟 王焕新 宋彦良 朱有启 卢灵珍
• 机 构: Henan Province Key Laboratory of Surface & Interface Science,Zhengzhou University of Light Industry,
• 出 处: Journal of Rare Earths
• 发表日期: 2004年期
• 关键词: hydrothermal facile Brunauer attributed doping ethanol powders selectivity Telle

Nd-doped(2%,5%,10% in mass ratio) SnO2 powders were prepared via a facile hydrothermal procedure.The as-prepared samples were characterized by X-ray diffraction(XRD),scanning electron microscopy(SEM),and Brunauer-Emmett-Teller(BET) specific surface area analyzers.Results showed that the Nd-doped SnO2 samples had more uniform and smaller primary particles compared with the pure sample,the particle size of the doped SnO2 decreased gradually with the increase of Nd,and the specific surface area also increased with the increase of the doped Nd.When used as gas sensing materials,the 5% and 10% Nd-doped sample showed high sensitivity and selectivity to ethanol.Furthermore,the Nd-doped sample showed fast response and recovery time to ethanol gas.This could be attributed to their small diameter,large surface area and Nd element doping.

Nd-doped (2%, 5%, 10% in mass ratio) SnO2 powders were prepared via a facile hydrothermal procedure.The as-prepared samples were characterized by X-ray diffraction (XRD), scanning electron microscopy The Brunauer-Emmett-Teller (BET) specific surface area analyzers. Results showed that the Nd-doped SnO2 samples had more uniform and smaller primary particles compared with the pure sample, the particle size of the doped SnO2 decreased gradually with the increase of Nd, and the specific surface area also increased with the increase of the doped Nd. Chen used as gas sensing materials, the 5% and 10% Nd-doped sample showed high sensitivity and selectivity to ethanol. Furthermore, the Nd-doped sample showed fast response and recovery time to ethanol gas.This could be attributed to their small diameter, large surface area and Nd element doping.