The Library
Characterisation of graphite nanoplatelets (GNP) prepared at scale by high-pressure homogenisation
Tools
Guerra, Valentina, Wan, Chaoying, Degirmenci, Volkan, Sloan, Jeremy, Presvytis, Dimitris, Watson, Michael and McNally, Tony (2019) Characterisation of graphite nanoplatelets (GNP) prepared at scale by high-pressure homogenisation. Journal of Materials Chemistry C, 7 (21). pp. 6383-6390. doi:10.1039/C9TC01361J ISSN 2050-7526.
|
PDF
WRAP-characterisation-graphite-nanoplatelets-(GNP)-prepared-scale-high-pressure-homogenisation-McNally-2019.pdf - Accepted Version - Requires a PDF viewer. Download (1505Kb) | Preview |
Official URL: http://dx.doi.org/10.1039/C9TC01361J
Abstract
Graphite nanoplatelets (GNP) were prepared by a high-pressure homogenisation process (HPHP) via exfoliation of bulk graphite, yielding GNP in the form of square shaped platelets with lateral dimensions on the micrometre (µm) scale and thicknesses on the nanometre (nm) scale (<200nm). The platelets have a polycrystalline structure with d002=0.335 nm and L002=2nm, with a low crystalline defect concentration confirmed by weak D and D́ bands in the Raman spectra. The shift in the G band from 1587 cm-1 (graphene) to 1580 cm-1 (GNP) and the asymmetric Ǵ band combined with a decrease in IǴ/IG from 0.45 for the bulk graphite to 0.40 for the GNP confirmed a partially exfoliated structure. X-Ray photoelectron spectroscopy (XPS) confirmed the presence of impurities on the GNP surface due to the surfactant used during the exfoliation process. Contact angle measurements (67° ±2° (0s), 64°±2° (10s)) suggested the surface of the GNP was hydrophilic. The as produced GNP is a macro-porous material with sheet-like particles having non-uniform shape and size and a BET surface area of ca 94 m2/g. The GNP is thermally stable under oxidative conditions up to 430°C. The HPHP process is readily scalable and provides a cost effective route for the production of GNP.
Item Type: | Journal Article | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Subjects: | T Technology > TA Engineering (General). Civil engineering (General) | ||||||||||||
Divisions: | Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group) | ||||||||||||
Library of Congress Subject Headings (LCSH): | Graphene -- Industrial applications | ||||||||||||
Journal or Publication Title: | Journal of Materials Chemistry C | ||||||||||||
Publisher: | Royal Society of Chemistry | ||||||||||||
ISSN: | 2050-7526 | ||||||||||||
Official Date: | 2019 | ||||||||||||
Dates: |
|
||||||||||||
Volume: | 7 | ||||||||||||
Number: | 21 | ||||||||||||
Page Range: | pp. 6383-6390 | ||||||||||||
DOI: | 10.1039/C9TC01361J | ||||||||||||
Status: | Peer Reviewed | ||||||||||||
Publication Status: | Published | ||||||||||||
Access rights to Published version: | Restricted or Subscription Access | ||||||||||||
Date of first compliant deposit: | 2 May 2019 | ||||||||||||
Date of first compliant Open Access: | 1 May 2020 | ||||||||||||
RIOXX Funder/Project Grant: |
|
Request changes or add full text files to a record
Repository staff actions (login required)
View Item |
Downloads
Downloads per month over past year