Synthesis of SiO2 Nanotubes and Their Application as Nanoscale Reactors
Synthesis of SiO2 Nanotubes and Their Application as Nanoscale Reactors
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DOI：
10.1021/cm051727v
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发表时间：
2006-01
影响因子：
8.6
通讯作者：
H. Ogihara;S. Takenaka;I. Yamanaka;E. Tanabe;and Akira Genseki;K. Otsuka
中科院分区：
文献类型：
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作者：
H. Ogihara;S. Takenaka;I. Yamanaka;E. Tanabe;and Akira Genseki;K. Otsuka
SiO2纳米管可以通过在碳纳米纤维（CNF）表面水解原硅酸四乙酯（TEOS），然后去除CNF来合成。在SiO2纳米管的合成中，CNF充当模板。 SiO2纳米管的壁厚和内径分别随TEOS的水解时间和CNF模板的直径而变化。 TEOS水解的催化剂是CNF表面的官能团。在含有Ni金属颗粒的SiO2纳米管上进行甲烷分解，从而在SiO2纳米管内部形成直径均匀(约8nm)的碳纳米管。这一结果有力地表明 SiO2 纳米管可以作为纳米级反应器。
SiO2 nanotubes could be synthesized by hydrolysis of tetraethyl orthosilicate (TEOS) on the surface of carbon nanofibers (CNF), followed by removal of CNF. In the synthesis of SiO2 nanotubes, CNF acted as templates. The wall thickness and the internal diameter of SiO2 nanotubes were changed by hydrolysis time of TEOS and the diameter of CNF templates, respectively. The catalysts for the hydrolysis of TEOS were functional groups on the surface of CNF. The methane decomposition was carried out over SiO2 nanotubes containing Ni metal particles, so that carbon nanotubes with uniform diameter (ca. 8 nm) were formed at the inside of SiO2 nanotubes. This result strongly indicated that SiO2 nanotubes worked as nanoscale reactors.