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›› 2013, Vol. 13 ›› Issue (3): 531-535.

• 材料工程专栏 • Previous Articles     Next Articles

Synthesis of SnO2 Powder Doped with Rare Earth Elements by Hydro-thermal Method and Its Gas Sensing Properties towards Ethanol

SONG Jin-ling GUO Guan-ming ZHOU Zhang-cai MOU Lian-wei CAI Ying ZHANG Yin   

  1. School of Rare Earth, Inner Mongolia University of Science and Technology School of Rare Earth, Inner Mongolia University of Science and Technology Inner Mongolia Mengda New Energy Chemical Industry Base Development Co. Ltd. Inner Mongolia Mengda New Energy Chemical Industry Base Development Co. Ltd. School of Rare Earth, Inner Mongolia University of Science and Technology Material and Metallurgical School, Inner Mongolia University of Science & Technology
  • Received:2013-06-17 Revised:1900-01-01 Online:2013-06-20 Published:2013-06-20
  • Contact: SONG Jin-ling

水热法制备稀土元素掺杂二氧化锡及其对乙醇气敏性能

宋金玲 郭冠铭 周长才 牟连维 蔡颖 张胤   

  1. 内蒙古科技大学稀土学院 内蒙古科技大学稀土学院 内蒙古蒙大新能源化工基地开发有限公司 内蒙古蒙大新能源化工基地开发有限公司 内蒙古科技大学稀土学院 内蒙古科技大学材料与冶金学院
  • 通讯作者: 宋金玲

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Abstract: SnO2 and rare earth-doped SnO2 powders were prepared by hydro-thermal method. Their structures and gas sensing properties were characterized by XRD and gas sensing instrument, respectively. The results show that the prepared SnO2 powder exhibits tetragonal rutile structure and rare earth ions doping do not change its crystalline structure without formation of new phases. Its gas sensing results show that SnO2:La exhibits better sensitivity towards ethanol. The gas sensing mechanism is analyzed. In addition, the corresponding sensitivity of SnO2:La increases with increasing of ethanol concentration and fluctuates with rising of temperature. The sensitivity of SnO2:La towards 1.00′10-4 ethanol obtains 101.1 at 250℃, which is the best. The response time and recovery time are about 5 s under the condition.

Key words: hydro-thermal method, SnO2, SnO2:La, gas sensing property

摘要： 利用水热法制备了SnO2粉末及掺杂不同稀土离子的SnO2粉末. 通过XRD和气敏测试仪对其结构和性能进行了表征和测试. 结果表明，所制备的SnO2粉末呈四方金红石结构，稀土离子的掺入并没有改变SnO2的晶体结构，也无新晶相的出现. 掺杂镧的SnO2样品(SnO2:La)对乙醇有较高的气敏性. 分析了气敏机理. SnO2:La的灵敏度随着乙醇浓度的增加而增加，随温度的升高呈现波动状，且当温度在250℃时，SnO2:La对1.00′10-4乙醇的灵敏度最大，可达到101.1. 在此条件下其响应时间和恢复时间约为5 s.

关键词: 水热法, SnO2, SnO2:La, 气敏性

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