东北大学学报:自然科学版 ›› 2016, Vol. 37 ›› Issue (4): 558-562.DOI: 10.12068/j.issn.1005-3026.2016.04.022

• 资源与土木工程 • 上一篇    下一篇

热蒸发法制备TeO2纳米线的生长机理

沈岩柏1, 马嘉伟1,2, 魏德洲1, 张宝庆1   

  1. (1. 东北大学 资源与土木工程学院, 辽宁 沈阳110819; 2. 中冶北方(大连)工程技术有限公司, 辽宁 大连116600)
  • 收稿日期:2015-03-23 修回日期:2015-03-23 出版日期:2016-04-15 发布日期:2016-04-05
  • 通讯作者: 沈岩柏
  • 作者简介:沈岩柏(1978-),男,黑龙江密山人,东北大学教授,博士生导师; 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:
    国家优秀青年科学基金资助项目(51422402); 中央高校基本科研业务费专项资金资助项目(N140105002); 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).

Growth Mechanism of TeO2 Nanowires Synthesized by Thermal Evaporation Method

SHEN Yan-bai1, MA Jia-wei1,2, WEI De-zhou1, ZHANG Bao-qing1   

  1. 1. School of Resources & Civil Engineering, Northeastern University, Shenyang 110819, China; 2. Northern Engineering and Technology Corporation
  • Received:2015-03-23 Revised:2015-03-23 Online:2016-04-15 Published:2016-04-05
  • Contact: SHEN Yan-bai
  • About author:-
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摘要: 以金属碲粉为原料,在450℃下采用热蒸发法在镀金玻璃基板上成功合成TeO2纳米线,利用X射线衍射、扫描电子显微镜、透射电子显微镜对TeO2纳米线的结构和形貌进行表征,并对其生长机理进行探讨.研究结果表明,具有四方相晶体结构的TeO2纳米线直径在70~200nm之间,长度在几百微米至2mm.通过对不同生长时间所获得产物的形貌观察,对TeO2纳米线的生长过程进行了分析,推断TeO2纳米线是通过气-固机制进行生长,镀金薄膜可能只是起到诱导和加速TeO2纳米线生长的作用.

关键词: 二氧化碲, 纳米线, 微观结构, 热蒸发, 生长机理

Abstract: TeO2 nanowires were synthesized on Au-coated glass substrates at 450℃ by thermal evaporation method using Te powders as the source material. The structures and morphology of TeO2 nanowires were characterized by X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. A possible growth mechanism was proposed. The results showed that TeO2 nanowires with a tetragonal structure were approximately 70~200nm in diameter and several hundreds of micrometers to 2mm in length. By the morphology observation of the as-prepared products obtained at different growth times, the growth process of TeO2 nanowires was analyzed. It is concluded that the growth of TeO2 nanowires is based on vapor-solid growth mechanism, where Au film deposited on the glass substrates is possibly used for inducing and accelerating the growth of TeO2 nanowires.

Key words: TeO2, nanowires, microstructure, thermal evaporation, growth mechanism

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