火柴棒状纳米碳管的制备及其生长机理

doi:10.11949/j.issn.0438-1157.20150780

化工学报 ›› 2015, Vol. 66 ›› Issue (9): 3801-3807.DOI: 10.11949/j.issn.0438-1157.20150780

• 材料化学工程与纳米技术 • 上一篇

火柴棒状纳米碳管的制备及其生长机理

李国华^1,2, 孙海标¹, 喻洋¹, 谢伟淼¹

1 浙江工业大学化学工程学院, 浙江杭州 310014;
2 绿色化学合成技术国家重点实验室培育基地, 浙江杭州 310014

收稿日期:2015-06-01 修回日期:2015-06-08 出版日期:2015-09-05 发布日期:2015-09-05
通讯作者: 李国华
基金资助:
国家自然科学基金项目(21173193,21301154);宁波市自然科学基金项目(2014A610116)。

Preparation of match-like carbon nanotube and its growth mechanism

LI Guohua^1,2, SUN Haibiao¹, YU Yang¹, XIE Weimiao¹

1 School of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, Zhejiang, China;
2 State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology, Hangzhou 310014, Zhejiang, China

Received:2015-06-01 Revised:2015-06-08 Online:2015-09-05 Published:2015-09-05
Supported by:
supported by the National Natural Science Foundation of China (21173193, 21301154) and the Natural Science Foundation of Ningbo City (2014A610116).

摘要/Abstract

摘要：

以钨酸钠为钨源,氯化钠为诱导剂,通过水热法制备了三氧化钨(WO₃)纳米棒,再以葡萄糖为碳源,经再次水热反应对WO₃表面进行碳包覆,然后在氢气和甲烷混合气氛中反应一段时间获得了具有火柴棒状结构的纳米碳管。采用X射线衍射分析、场发射扫描电子显微镜、透射电子显微镜和X射线能量散射谱等手段对样品的晶型、形貌、微结构和表面化学元素进行了表征与分析。结果表明,样品由纳米碳管和碳化钨(WC)构成。其中,纳米碳管为火柴棒状,长度0.5～1.0 μm,直径100 nm左右;WC颗粒位于纳米碳管内部,其大小决定了火柴棒状纳米碳管的内径。这充分说明WC在碳管的生长过程中充当催化剂的作用。

关键词: 火柴棒状, 纳米碳管, 碳化钨, 催化, 生长机理

Abstract:

Tungsten trioxide nanorod was prepared by a hydrothermal method using sodium tungstate as tungsten source and sodium chloride as an inducer. The nanorod was coated with carbon by a hydrothermal reaction once again and using glucose as a carbon source. Match-like carbon nanotube was fabricated by reaction under a mixed gas of H₂ and CH₄ with a volume ratio of H₂ to CH₄ of 1:4. The crystal phase, morphology, microstructure and chemical elements of the samples were characterized and analyzed by X-ray diffraction, scanning electron microscope, transmission electron microscope and X-ray energy dispersion spectrum. The results showed that the sample was consisted of carbon nanotube and tungsten carbide (WC). The morphology of the carbon nanotube was of match-like with a length between 0.5 μm and 1.0 μm, and a diameter around 100 nm. WC particles laid in the inner space of the carbon nanotube and the inner diameter of the nanotube was depended on the diameter of WC particle. These implied that WC particle took a catalytic role during the growth of the carbon nanotube.

Key words: match-like, carbon nanotube, tungsten carbide, catalysis, growth mechanism

中图分类号:

O646

李国华, 孙海标, 喻洋, 谢伟淼. 火柴棒状纳米碳管的制备及其生长机理[J]. 化工学报, 2015, 66(9): 3801-3807.

LI Guohua, SUN Haibiao, YU Yang, XIE Weimiao. Preparation of match-like carbon nanotube and its growth mechanism[J]. CIESC Journal, 2015, 66(9): 3801-3807.

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火柴棒状纳米碳管的制备及其生长机理

Preparation of match-like carbon nanotube and its growth mechanism

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