Fabrication of silica nanotubes using silica coated multi-walled carbon nanotubes as the template
Fabrication of silica nanotubes using silica coated multi-walled carbon nanotubes as the template
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DOI：
10.1016/j.jcis.2008.03.045
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发表时间：
2008-06-01
影响因子：
9.9
通讯作者：
Shim, Sang Eun
中科院分区：
文献类型：
--
作者：
Kim, Myunghun;Hong, Jinho;Shim, Sang Eun
以多壁碳纳米管（MWCNTs）为模板材料合成了二氧化硅纳米管。首先，我们制备了二氧化硅包覆的多壁碳纳米管复合材料的表面氧化的多壁碳纳米管使用KMnO 4在相转移催化剂的存在下，然后通过接枝2-氨乙基3-氨丙基三甲氧基硅烷，AEAPS。接枝到MWCNTs上的AEAPS中的胺基可以通过酸碱相互作用激活二氧化硅壳的形成。合成的二氧化硅在MWCNTs上形成了一层厚度可控的均匀层，具有较强的三维稳定性。在800 ℃煅烧后，复合材料的内部MWCNTs完全分解，外部二氧化硅壳层保持其原始形状而不变形。最后，我们可以获得具有13.0 nm的平均层厚度的二氧化硅纳米管。(c)2008年爱思唯尔公司All rights reserved.
Silica nanotubes were synthesized using the multi-walled carbon nanotubes (MWCNTs) as the template material. First, we prepared silica coated MWCNT composites by surface oxidation of MWCNTs using KMnO4 in the presence of a phase transfer catalyst and followed by grafting of 2-aminoethyl 3-aminopropyl trimethoxy silane, AEAPS. The amine groups in grafted AEAPS on MWCNTs could activate the silica shell formation by acid-base interaction. The synthesized silica was formed a uniform layer on MWCNTs with a controllable thickness and possessed sturdy 3-dimensional stability. After calcinations at 800 degrees C, the inner MWCNTs of the composite were completely decomposed and the outer silica shell layer maintained without distortion of its original shape. Finally, we could obtain the silica nanotubes having 13.0 nm of average layer thickness. (c) 2008 Elsevier Inc. All rights reserved.