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Facile silane functionalization of graphene oxide

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Abbas, Syeda, Rees, Gregory J., Kelly, Nicole L., Dancer, Claire E. J., Hanna, John V. and McNally, Tony (2018) Facile silane functionalization of graphene oxide. Nanoscale, 10 (34). 16231-16242 . doi:10.1039/C8NR04781B ISSN 2040-3364.

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Official URL: http://dx.doi.org/10.1039/C8NR04781B

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Abstract

The facile silane functionalization of graphene oxide (GO) was achieved yielding vinyltrimethoxysilane-reduced graphene oxide (VTMOS-rGO) nanospheres located in the inter-layer spacing between rGO sheets via an acid–base reaction using aqueous media. The successful grafting of the silane agent with pendant vinyl groups to rGO was confirmed by a combination of Fourier-transform infrared (FTIR), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD). The structure and speciation of the silane-graphene network (nanosphere) and, the presence of free vinyl groups was verified from solid-state magic angle spinning (MAS) and solution 13C and 29Si nuclear magnetic resonance (NMR) measurements. Evidence from Scanning Electron Microscopy (SEM), High-Resolution Transmission Electron Microscopy (HRTEM) and TEM-High-Angle Annular Dark-Field (TEM-HAADF) imaging showed that these silane networks aided the exfoliation of the rGO layers preventing agglomeration, the interlayer spacing increased by 10 Å. The thermal stability (TGA/DTA) of VTMOS-rGO was significantly improved relative to GO, displaying just one degradation process for the silane network some 300 °C higher than either VTMOS or GO alone. The reduction of GO to VTMOS-rGO induced sp2 hybridization and enhanced the electrical conductivity of GO by 105 S m−1.

Item Type: Journal Article
Subjects: Q Science > QC Physics
Q Science > QD Chemistry
Divisions: Faculty of Science, Engineering and Medicine > Science > Physics
Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group)
Library of Congress Subject Headings (LCSH): Graphene, Graphene -- Oxidation, Nanostructured materials, Silane compounds, Organosilicon compounds
Journal or Publication Title: Nanoscale
Publisher: Royal Society of Chemistry
ISSN: 2040-3364
Official Date: 14 September 2018
Dates:
DateEvent
14 September 2018Published
15 August 2018Available
15 August 2018Accepted
Volume: 10
Number: 34
Page Range: 16231-16242
DOI: 10.1039/C8NR04781B
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access
Date of first compliant deposit: 24 August 2018
Date of first compliant Open Access: 15 August 2019
RIOXX Funder/Project Grant:
Project/Grant IDRIOXX Funder NameFunder ID
UNSPECIFIED[EPSRC] Engineering and Physical Sciences Research Councilhttp://dx.doi.org/10.13039/501100000266
UNSPECIFIEDJaguar Land Rover (Firm)http://viaf.org/viaf/305209406

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