TeO2纳米线的制备及其室温NO2气敏特性

doi:10.12068/j.issn.1005-3026.2014.07.024

东北大学学报:自然科学版 ›› 2014, Vol. 35 ›› Issue (7): 1019-1022.DOI: 10.12068/j.issn.1005-3026.2014.07.024

TeO2纳米线的制备及其室温NO2气敏特性

沈岩柏，魏德洲，马嘉伟，张宝庆

(东北大学资源与土木工程学院，辽宁沈阳110819)

收稿日期:2013-07-01 修回日期:2013-07-01 出版日期:2014-07-15 发布日期:2014-04-11
通讯作者: 沈岩柏
作者简介:沈岩柏(1978-)，男，黑龙江密山人，东北大学副教授；魏德洲(1956-)，男，河南南阳人，东北大学教授，博士生导师.
基金资助:
中央高校基本科研业务费专项资金资助项目(N120501002)；辽宁省高等学校优秀人才支持计划项目(LJQ2013025)；教育部高等学校博士学科点专项科研基金资助项目(20130042120033)；教育部留学回国人员科研启动基金资助项目(47-3)；东北大学引进人才科研启动项目(26333008).

Preparation and RoomTemperature NO2 Sensing Properties of TeO2 Nanowires

SHEN Yanbai， WEI Dezhou， MA Jiawei， ZHANG Baoqing

School of Resources & Civil Engineering， Northeastern University， Shenyang 110819， China.

Received:2013-07-01 Revised:2013-07-01 Online:2014-07-15 Published:2014-04-11
Contact: SHEN Yanbai
About author:-
Supported by:
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摘要/Abstract

摘要： 以金属Te颗粒为原料，采用热蒸发法于镀金硅基板表面制备出TeO2纳米线，并以其为气敏材料制备成气敏元件.采用XRD，SEM和TEM表征TeO2纳米线的相组成和微观结构，结果表明，TeO2纳米线具有单一的四方相晶体结构，长度约为几十微米，直径约为80~600nm.在TeO2纳米线的顶端未发现Au颗粒，表明TeO2纳米线按照气-固机制进行生长.气敏特性的研究结果表明，TeO2纳米线呈现p型半导体特性，在室温条件下对NO2气体具有良好的响应，气体灵敏度与NO2气体体积分数呈线性增加关系.最后对气敏机制进行了初步探讨.

关键词: 二氧化碲, 纳米线, 二氧化氮, 气体传感器, 气敏特性

Abstract: TeO2 nanowires were synthesized on Aucoated Si substrate by thermal evaporation using Te metal as the source material. The gas sensor was prepared by using TeO2 nanowires as the sensing material. Microstructural characterization by means of XRD， SEM and TEM showed that TeO2 nanowires were single phase of tetragonal structure. The nanowires were approximately several tens of micrometers in length and 80~600nm in diameter. No Au particles existed at the top of TeO2 nanowires， revealing that the growth of TeO2 nanowires occurred in vaporsolid mechanism. The gas sensing measurements indicated that TeO2 nanowires showed a ptype electrical conduction and reversible response to NO2 gas at room temperature. The sensitivity showed a linear increase with the increasing of NO2 gas volume fraction. The gas sensing mechanism of TeO2 nanowire sensor was investigated preliminarily.

Key words: tellurium dioxide, nanowire, nitrogen dioxide, gas sensor, gas sensing property

中图分类号:

TN30492

沈岩柏，魏德洲，马嘉伟，张宝庆. TeO2纳米线的制备及其室温NO2气敏特性[J]. 东北大学学报:自然科学版, 2014, 35(7): 1019-1022.

SHEN Yanbai， WEI Dezhou， MA Jiawei， ZHANG Baoqing. Preparation and RoomTemperature NO2 Sensing Properties of TeO2 Nanowires[J]. Journal of Northeastern University Natural Science, 2014, 35(7): 1019-1022.

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TeO2纳米线的制备及其室温NO2气敏特性

Preparation and RoomTemperature NO2 Sensing Properties of TeO2 Nanowires

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