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oa South African Journal of Chemistry - Synthesis of nitrogen-doped carbon nanotubes with layered double hydroxides containing iron, cobalt or nickel as catalyst precursors : research article

 

Abstract

Nitrogen-doped carbon nanotubes (CN) were synthesized by the catalytic chemical vapour deposition of ethylenediamine with layered double hydroxides (LDHs) containing iron, cobalt or nickel as catalyst precursors at 650 °C. The catalytically active metal particles were obtained by calcination of LDHs followed by reduction. X-ray diffraction was used to characterize the structures of the precursors and their calcined products. Transmission electron microscopy, X-ray photoelectron spectroscopy and Raman spectroscopy were used to characterize the grown CN. The results show that the CN grown with MgFe-LDH as catalyst precursor have a bamboo-like morphology and large diameter, while hollow tubes are obtained with CoMgAl- and NiMgAl-LDH as catalyst precursors. The CN grown with CoMgAl-LDH have the highest N-doped content and the CN grown with NiMgAl-LDH have the highest degree of graphitization among these three products.

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/content/chem/63/1/EJC24519
2010-01-01
2016-12-03
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