无机材料学报

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微波水解法制备纳米ZnO及其气敏特性研究

徐甲强1,2; 王焕新2; 张建荣3; 沈嘉年1   

  1. 1. 上海大学材料研究所, 上海 200072; 2. 郑州轻工业学院材料与化学工程学院, 郑州 450002; 3. 中国科学院上海硅酸盐研究所高性能陶瓷与超微结构国家重点实验室, 上海 200050
  • 收稿日期:2003-08-19 修回日期:2003-10-21 出版日期:2004-11-20 网络出版日期:2004-11-20

Preparation and Gas-sensing Properties of Zinc Oxide Nano-powders by Microwave Hydrolysis

XU Jia-Qiang1,2; WANG Huan-Xin2; ZHANG Jian-Rong3; SHEN Jia-Nian1   

  1. 1.Material Institute of Shanghai University; Shanghai 200072; China; 2.College of Material & Chemical Engineering; Zhengzhou Institute of Light Industry; Zhengzhou 450002, China; 3.State Key Laboratory of High Performance Ceramics and Superfine Microstructure; Shanghai Institute of Ceramics; Chinese Academy of Sciences; Shanghai 200050; China
  • Received:2003-08-19 Revised:2003-10-21 Published:2004-11-20 Online:2004-11-20

摘要: 以Zn(CH3COO)2-2H2O为原料,采用微波水解法和恒温水解法制备了纳米ZnO粉体,用X射线衍射仪、透射电镜对产物的相组成和微观结构进行了表征和分析,并且测试了其气敏特性.为了改善纳米ZnO的气敏性能,利用微波水解法,通过掺杂Pt、Pd贵金属制备出其相应的纳米复合氧化物.与恒温水解法相比,微波水解法所需反应时间显著缩短、反应物浓度提高;两种方法制备的纳米ZnO粉体皆对酒精和汽油具有较高灵敏度;掺杂Pt或Pd可提高纳米ZnO对酒精和汽油的选择性.

关键词: 微波水解, 氧化锌, 纳米材料, 气敏性能, 气体传感器

Abstract: ZnO nano-powders were prepared by using microwave hydrolysis and constant temperature hydrolysis methods, using
Zn(CH3COO)2·2H2O as the starting material. In order to improve gas sensitivities, ZnO nano-powders doped with Pt of Pd were also
prepared by using the microwave hydrolysis method. Their phase constitution and crystal structure were characterized by TEM and XRD analyses, and their
gas sensitivities were measured. results show that the microwave hydrolysis method is better than the canstant temperature hydrolysis method, for obtaining
ZnO nano-powders. The ZnO nanopowders prepared by using the two methods possess higher sensitivities to ethanol and gasoline, and the ZnO nanopowders doped
with Pt or Pd can enhance their selectivities to ethonal and gasoline, respectively.

Key words: microware hydrolysis, ZnO, nano-sized materials, gas-sensing properties, gas sensor

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