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

Xue Zhao; Xiyan Liu; Feng Yang; Qidong Liu; Zeyao Zhang; Yan Li

doi:10.1039/D0QI01114B

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

Xue Zhao,§^a Xiyan Liu,§^a Feng Yang,^a Qidong Liu,^a Zeyao Zhang^abcd and Yan Li

*^a

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* Corresponding authors

^a Beijing National Laboratory for Molecular Science, Key Laboratory for the Physics and Chemistry of Nanodevices, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
E-mail: yanli@pku.edu.cn

^b Peking University Shenzhen Institute, Shenzhen 518057, China

^c College of Engineering, Peking University, Beijing 100871, China

^d PKU-HKUST ShenZhen-HongKong Institution, Shenzhen 518057, China

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.

This article is part of the themed collection: Celebrating 110th Anniversary of Chemistry at Peking University

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DOI: https://doi.org/10.1039/D0QI01114B
Article type: Research Article
Submitted: 14 Sep 2020
Accepted: 28 Oct 2020
First published: 29 Oct 2020

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

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

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

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