| 气氛对MnCr2O4尖晶石纳米线生长的影响 |
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| 引用本文： | 骆丽杰,童张法,莫丽玢,梁钟媛,陈拥军.气氛对MnCr2O4尖晶石纳米线生长的影响[J].高等学校化学学报,2009,30(4):647-650. |
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| 作者姓名： | 骆丽杰 童张法 莫丽玢 梁钟媛 陈拥军 |
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| 作者单位： | 广西大学化学化工学院,南宁,530004 |
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| 基金项目： | 广西大学引进人才项目，清华大学新型陶瓷与精细工艺国家重点实验室开放基金，教育部科学技术研究重点项目 |
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| 摘 要： | 建立了一种在氮气和氢气的还原性混合气氛和1100 ℃条件下加热商业不锈钢箔(304)制备MnCr2O4尖晶石纳米线的简单方法, 并研究了不同气氛对纳米线生长的影响. 研究发现, 混合气体中氢气含量的变化会影响纳米线的形貌和产率; 而氧化性气氛(如空气)下则得不到纳米线. 在还原性气氛下, Mn和Cr原子可以和反应室内残留的痕量氧反应生成MnCr2O4尖晶石, 而Fe和Ni原子不能被氧化, 但是Fe和Ni可以起到催化纳米线生长的作用, 纳米线的生长机理属于自催化性的气-液-固(VLS)机制.
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| 关 键 词： | MnCr2O4纳米线 不锈钢箔 气氛 气-液-固生长机制 |
| 收稿时间： | 2008-09-19 |
Effect of Atmosphere on the Growth of MnCr_2O_4 Spinel Nanowires |
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| LUO Li-Jie,TONG Zhang-Fa,MO Li-Bin,LIANG Zhong-Yuan,CHEN Yong-Jun.Effect of Atmosphere on the Growth of MnCr_2O_4 Spinel Nanowires[J].Chemical Research In Chinese Universities,2009,30(4):647-650. |
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| Authors: | LUO Li-Jie TONG Zhang-Fa MO Li-Bin LIANG Zhong-Yuan CHEN Yong-Jun |
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| Institution: | School of Chemistry and Chemical Engineering;Guangxi University;Nanning 530004;China |
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| Abstract: | MnCr2O4 spinel single-crystalline nanowires were synthesized by heating commercial stainless steel foil under a reducing atmosphere.The hydrogen content in the atmosphere has important influence on the yield and morphology of the grown nanowires.It was found that the reducing atmosphere plays a key role in the nanowire growth.In the reducing atmosphere,the Mn and Cr elements in the stainless steel could be selectively oxidized because of their higher affinity for oxygen than the Fe and Ni elements.The Fe an... |
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| Keywords: | MnCr2O4 nanowire Stainless steel foil Atmosphere VLS growth mechanism |
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