Synthesis of Nitrogen‐doped Carbon Nanocoils via One‐step Acetonitrile Catalytic CVD using a Ni‐Fe Layered Double Hydroxide as Catalyst Precursor

Abstract

A simple catalytic CVD method for the synthesis of N‐doped carbon nanocoils (CNCs), using acetonitrile as both the carbon and nitrogen source, is developed. A Ni–Fe layered double hydroxide that has not been subjected to any prior annealing or reducing treatment is used as a catalyst precursor. The steps of precursor‐to‐catalyst transformation, catalyst activation, deposition of CNCs, and nitrogen doping are performed in situ, in a single process.

Low-temperature growth of nitrogen-doped carbon nanofibers by acetonitrile catalytic CVD using Ni-based catalysts

“…N-doped CNFs were synthesized in a fixed-bed CVD process using acetonitrile as both the carbon and nitrogen source (Iwasaki et al 2013(Iwasaki et al , 2015. Approximately 0.1 g of a catalyst powder was spread onto an alumina substrate (boat) and then placed in a quartz reaction tube with an inner diameter of 18 mm.…”

Synthesis of Nitrogen-Doped Carbon Nanocoils with Adjustable Morphology Using Ni—Fe Layered Double Hydroxides as Catalyst Precursors

“…By preparing Ni–Fe LDHs in a mixed-valence Ni(II)–Fe(II)–Fe(III) system, the nickel and iron content was readily adjusted without drastically changing the crystal structure of the catalyst. In the employed CVD system, precursor-to-catalyst transformation, catalyst activation, formation of CNCs, and nitrogen doping advantageously occur in situ in a single process [29]. The current study investigates the effect of catalyst composition (Ni/Fe molar ratio) and CVD reaction temperature on the resulting morphology of N-doped CNCs.…”

“…In this study, a fixed-bed CVD process using acetonitrile as both the carbon and nitrogen sources [29] was employed to synthesize N-doped CNCs with adjusted morphologies. NiFe 2 O 4 /NiO nanocomposites derived from Ni-Fe layered double hydroxides (LDHs) were employed as the catalyst.…”