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›› 2012, Vol. 12 ›› Issue (2): 330-334.

• 材料工程专栏 • 上一篇    下一篇

喷雾燃烧制备SnO2纳米棒及其气敏性能

吴志文 胡彦杰 李春忠   

  1. 华东理工大学材料科学与程学院 华东理工大学材料科学与工程学院 华东理工大学超细材料制备与应用教育部重点实验室
  • 收稿日期:2012-02-14 修回日期:2012-03-26 出版日期:2012-04-20 发布日期:2012-04-20
  • 通讯作者: 李春忠

Flame Spray Synthesis of SnO2 Nanorods and Their Gas Sensing Properties

WU Zhi-wen HU Yan-jie LI Chun-zhong   

  1. School of Materials Science and Engineering, East China University of Science ＆ Technology School of Materials Science and Engineering，East China University of Science and Technology Key Laboratory For Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology
  • Received:2012-02-14 Revised:2012-03-26 Online:2012-04-20 Published:2012-04-20
  • Contact: LI Chun-zhong

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摘要： 采用喷雾燃烧法制备SnO2纳米棒，对其形貌和结构进行了表征. 所制SnO2纳米棒长200~350 nm，直径30~50 nm，沿(001)方向生长. 考察了Fe掺杂量和Sn4+浓度对SnO2纳米棒形貌的影响，分析了其生长机理. 高温快速反应使Fe3+进入SnO2晶格，促使其沿(001)方向取向生长. 对乙醇等有机气体的气敏性能测试结果表明，棒状SnO2比颗粒状的具有更优的气敏性能，在100′10-6(j)乙醇浓度下，棒状SnO2的灵敏度为12，反应和恢复时间分别为9.5和6 s.

关键词: 喷雾燃烧, SnO2, 纳米棒, 气敏传感器

Abstract: SnO2 nanorods were synthesized by flame spray pyrolysis. Their morphology and structure were characterized. The as-prepared SnO2 nanorods grow along the (001) direction with the length of 200~350 nm and diameter of 30~50 nm. The effects of Fe doping and Sn4+ concentration on their morphology and growth mechanism were investigated. In the high temperature and rapid reaction process the Fe3+ could permeate in SnO2 crystals and promote their growth along the (001) direction. The gas sensing performance tests showed that the SnO2 nanorods exhibited more excellent gas sensing properties than SnO2 nanoparticles with a sensitivity of (12~100)′10-6 (j) ethanol as well as response and recovery times of 9.5 and 6 s, respectively.

Key words: flame spray pyrolysis, SnO2, nanorods, gas sensor

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