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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
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WRAP-facile-silane-functionalization-graphene-oxide-Hanna-2018.pdf - Accepted Version - Requires a PDF viewer. Download (2991Kb) | Preview |
Official URL: http://dx.doi.org/10.1039/C8NR04781B
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 | |||||||||
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| Subjects: | Q Science > QC Physics Q Science > QD Chemistry |
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| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group) |
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| 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: |
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| 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 | |||||||||
| RIOXX Funder/Project Grant: |
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