Issue 4, 2021

Graphene oxide-supported cobalt tungstate as catalyst precursor for selective growth of single-walled carbon nanotubes

Abstract

The preparation of uniform and well-dispersed catalysts is crucially important for the controlled growth of single-walled carbon nanotubes (SWCNTs) on substrates. We used graphene oxide (GO) as a support to prepare well-dispersed CoWO4 nanoparticles with a narrow diameter distribution. When using GO- supported CoWO4 as the catalyst precursor and performing the SWCNT growth under the optimized chemical vapor deposition conditions, we realized the diameter-controlled growth of SWCNTs with the mean size of 1.74 ± 0.18 nm. CoWO4 is a superior catalyst precursor that can be used to obtain catalyst nanoparticles with a well-controlled size. GO shows to be a feasible substrate, presenting oxygen-containing groups which act as both the binding sites to facilitate the formation of uniform nanoparticles and hydrophilic groups to ensure a good dispersibility in aqueous solution. This strategy may find wide applications in the preparation of various functional nanomaterials.

Graphical abstract: Graphene oxide-supported cobalt tungstate as catalyst precursor for selective growth of single-walled carbon nanotubes

Supplementary files

Article information

Article type
Research Article
Submitted
14 sep 2020
Accepted
28 okt 2020
First published
29 okt 2020

Inorg. Chem. Front., 2021,8, 940-946

Graphene oxide-supported cobalt tungstate as catalyst precursor for selective growth of single-walled carbon nanotubes

X. Zhao, X. Liu, F. Yang, Q. Liu, Z. Zhang and Y. Li, Inorg. Chem. Front., 2021, 8, 940 DOI: 10.1039/D0QI01114B

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