Synthesis and characterization of Ni-Si mixed oxide nanocomposite as a catalyst for carbon nanotubes formation

Walter de Gruyter GmbH - Tập 29 - Trang 152-157 - 2011
M. A. Pasha1, Z. Fakhroueian2, A. Shafiekhani3, M. A. Vesaghi4, F. Farzaneh5
1Department of Basic Science, University of Mazandaran, Babolsar, Iran
2Institute of Petroleum Engineering, Tehran University, Tehran, Iran
3Physics Department, Alzahra University, Tehran, Iran
4Physics Department, Sharif University of Technology, Tehran, Iran
5Chemistry Department, Alzahra University, Tehran, Iran

Tóm tắt

Ni-Si mixed oxide nanocomposite was prepared by co-precipitation method with Ni(NO3)2 · 6H2O and tetraethylorthosilicate (TEOS) at pH = 10.5 under reflux condition for 6 days. It was then used as a catalyst for the formation of carbon nanotubes (CNTs) by CVD procedure. Characterization of the catalyst and the CNTs was carried out using X-ray diffractometry (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy. The results showed that Ni-Si mixed oxides nanorods with the average diameter of 3 to 4 nm play a key role in CNTs formation.

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