+44 (0)1509 263171
Please use this identifier to cite or link to this item:
|Title: ||A multi-method study of the transformation of the carbonaceous skeleton of a polymer-based nanoporous carbon along the activation pathway|
|Authors: ||Hu, Cheng|
Liu, Amelia C.Y.
Madani, S. Hadi
Biggs, Mark J.
|Issue Date: ||2015|
|Publisher: ||© Elsevier Ltd|
|Citation: ||HU, C. ... et al, 2015. A multi-method study of the transformation of the carbonaceous skeleton of a polymer-based nanoporous carbon along the activation pathway. Carbon, 85, pp. 119 - 134.|
|Abstract: ||The change in the carbonaceous skeleton of nanoporous carbons during their activation has received limited attention, unlike its counterpart process in the presence of an inert atmosphere. Here we adopt a multi-method approach to elucidate this change in a poly(furfuryl alcohol)-derived carbon activated using cyclic application of oxygen saturation at 250 °C before its removal (with carbon) at 800 °C in argon. The methods used include helium pycnometry, synchrotron-based X-ray diffraction (XRD) and associated radial distribution function (RDF) analysis, transmission electron microscopy (TEM) and, uniquely, electron energy-loss spectroscopy spectrum-imaging (EELS-SI), electron nanodiffraction and fluctuation electron microscopy (FEM). Helium pycnometry indicates the solid skeleton of the carbon densifies during activation from 78% to 93% of graphite. RDF analysis, EELS-SI, and FEM all suggest this densification comes through an in-plane growth of sp2 carbon out to the medium range without commensurate increase in order normal to the plane. This process could be termed ‘graphenization’. The exact way in which this process occurs is not clear, but TEM images of the carbon before and after activation suggest it may come through removal of the more reactive carbon, breaking constraining cross-links and creating space that allows the remaining carbon material to migrate in an annealing-like process.|
|Description: ||This article was published in the journal, Carbon [© Elsevier] and the definitive version is available at: http://dx.doi.org/10.1016/j.carbon.2014.12.051 . This manuscript version is made available under the CC-BY-NC-ND 4.0 licensehttp://creativecommons.org/licenses/by-nc-nd/4.0/|
|Sponsor: ||C.H. acknowledges a joint scholarship provided by China
Scholarship Council (CSC) and the University of Adelaide.
The support of the Australian Research Council Discovery
Program (DP110101293) is also gratefully acknowledged. ACYL
gratefully acknowledges the support of the Science Faculty
and the Monash Centre for Electron Microscopy (MCEM),
Monash University. The electron microscopy was performed
in the MCEM. The FEI Titan3 80-300 FEGTEM was funded by
the Australian Research Council (LE0454166). S.H.M. acknowledges
the award of a President’s Scholarship from the University
of South Australia.|
|Version: ||Accepted for publication|
|Publisher Link: ||http://dx.doi.org/10.1016/j.carbon.2014.12.051|
|Appears in Collections:||Published Articles (Chemistry)|
Files associated with this item:
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.