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Title: On the possibility of electrochemical unzipping of multiwalled carbon nanotubes to produce graphene nanoribbons

Abstract

Highlights: • MWCNTs synthesized and electrochemically oxidized to study the formation of GNR • HRTEM, Raman and XPS confirmed no successful unzipping occurred after oxidation • Electrochemical oxidation very unlikely facilitate formation of intercalated MWCNTs - Abstract: Multiwalled carbon nanotubes (MWCNTs) with different geometrical characteristics and chemical doping have been synthesized and electrochemically oxidized to study the possibility of unzipping, and creating graphene nanoribbon (GNR) nanostructures. Modified glassy carbon electrodes of the MWCNTs have been tested in an aqueous electrolyte via anodic scans in a wide range of potentials, followed by keeping at the maximum potential for different times. The microstructural features, structural defects, and functional groups and their elements have been then studied using high resolution transmission electron microscopy (HRTEM), Raman spectroscopy and X-ray photoelectron spectroscopy (XPS), respectively. All results have confirmed that no successful unzipping occurs in the MWCNTs after electrochemical oxidation, even for the nitrogen-doped MWCNTs (CN{sub x}-MWCNTs) with reactive nitrogen groups and defective bamboo structures. In contrast to the report by Shinde et al. (J. Am. Chem. Soc. 2011, 133, 4168–4171), it has been concluded that the electrochemical oxidation in aqueous electrolytes is very unlikely to facilitate sufficient incorporation of the intercalated molecules among the wallsmore » of the MWCNTs. These molecules are, however, responsible for unzipping of MWCNTs.« less

Authors:
; ;
Publication Date:
OSTI Identifier:
22581600
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Research Bulletin; Journal Volume: 80; Other Information: Copyright (c) 2016 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CARBON NANOTUBES; CARBON NITRIDES; CLATHRATES; CRYSTAL STRUCTURE; CRYSTALS; DOPED MATERIALS; ELECTROCHEMISTRY; GRAPHENE; MICROSTRUCTURE; NITROGEN; OXIDATION; RAMAN SPECTROSCOPY; TRANSMISSION ELECTRON MICROSCOPY; X-RAY PHOTOELECTRON SPECTROSCOPY

Citation Formats

Zehtab Yazdi, Alireza, Roberts, Edward P.L., and Sundararaj, Uttandaraman, E-mail: u.sundararaj@ucalgary.ca. On the possibility of electrochemical unzipping of multiwalled carbon nanotubes to produce graphene nanoribbons. United States: N. p., 2016. Web. doi:10.1016/J.MATERRESBULL.2016.04.001.
Zehtab Yazdi, Alireza, Roberts, Edward P.L., & Sundararaj, Uttandaraman, E-mail: u.sundararaj@ucalgary.ca. On the possibility of electrochemical unzipping of multiwalled carbon nanotubes to produce graphene nanoribbons. United States. doi:10.1016/J.MATERRESBULL.2016.04.001.
Zehtab Yazdi, Alireza, Roberts, Edward P.L., and Sundararaj, Uttandaraman, E-mail: u.sundararaj@ucalgary.ca. Mon . "On the possibility of electrochemical unzipping of multiwalled carbon nanotubes to produce graphene nanoribbons". United States. doi:10.1016/J.MATERRESBULL.2016.04.001.
@article{osti_22581600,
title = {On the possibility of electrochemical unzipping of multiwalled carbon nanotubes to produce graphene nanoribbons},
author = {Zehtab Yazdi, Alireza and Roberts, Edward P.L. and Sundararaj, Uttandaraman, E-mail: u.sundararaj@ucalgary.ca},
abstractNote = {Highlights: • MWCNTs synthesized and electrochemically oxidized to study the formation of GNR • HRTEM, Raman and XPS confirmed no successful unzipping occurred after oxidation • Electrochemical oxidation very unlikely facilitate formation of intercalated MWCNTs - Abstract: Multiwalled carbon nanotubes (MWCNTs) with different geometrical characteristics and chemical doping have been synthesized and electrochemically oxidized to study the possibility of unzipping, and creating graphene nanoribbon (GNR) nanostructures. Modified glassy carbon electrodes of the MWCNTs have been tested in an aqueous electrolyte via anodic scans in a wide range of potentials, followed by keeping at the maximum potential for different times. The microstructural features, structural defects, and functional groups and their elements have been then studied using high resolution transmission electron microscopy (HRTEM), Raman spectroscopy and X-ray photoelectron spectroscopy (XPS), respectively. All results have confirmed that no successful unzipping occurs in the MWCNTs after electrochemical oxidation, even for the nitrogen-doped MWCNTs (CN{sub x}-MWCNTs) with reactive nitrogen groups and defective bamboo structures. In contrast to the report by Shinde et al. (J. Am. Chem. Soc. 2011, 133, 4168–4171), it has been concluded that the electrochemical oxidation in aqueous electrolytes is very unlikely to facilitate sufficient incorporation of the intercalated molecules among the walls of the MWCNTs. These molecules are, however, responsible for unzipping of MWCNTs.},
doi = {10.1016/J.MATERRESBULL.2016.04.001},
journal = {Materials Research Bulletin},
number = ,
volume = 80,
place = {United States},
year = {Mon Aug 15 00:00:00 EDT 2016},
month = {Mon Aug 15 00:00:00 EDT 2016}
}