Surface modification of pyrolyzed carbon fibres by cyclic voltammetry and their characterization with XPS and dye adsorption

Georgiou, P; Walton, J; Simitzis, J

dc.contributor.author	Georgiou, P	en
dc.contributor.author	Walton, J	en
dc.contributor.author	Simitzis, J	en
dc.date.accessioned	2014-03-01T01:34:43Z
dc.date.available	2014-03-01T01:34:43Z
dc.date.issued	2010	en
dc.identifier.issn	0013-4686	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/20813
dc.subject	Carbon fibre	en
dc.subject	Cyclic voltammetry	en
dc.subject	Dye adsorption	en
dc.subject	Pyrolysis	en
dc.subject	XPS	en
dc.subject.classification	Electrochemistry	en
dc.subject.other	Alizarin yellow	en
dc.subject.other	Aqueous electrolyte solutions	en
dc.subject.other	Aqueous solutions	en
dc.subject.other	Carbon fibre	en
dc.subject.other	Carbon fibres	en
dc.subject.other	Cathodic peak	en
dc.subject.other	Complementary methods	en
dc.subject.other	Donor groups	en
dc.subject.other	Dye adsorption	en
dc.subject.other	Electron acceptor	en
dc.subject.other	Fibre surfaces	en
dc.subject.other	High-energy resolution	en
dc.subject.other	Methylene Blue	en
dc.subject.other	Oxide formation	en
dc.subject.other	Oxygen concentrations	en
dc.subject.other	Oxygen containing groups	en
dc.subject.other	Partial reduction	en
dc.subject.other	Potential sweep	en
dc.subject.other	Pyrolyzed carbon	en
dc.subject.other	Surface modification	en
dc.subject.other	Water decomposition	en
dc.subject.other	XPS	en
dc.subject.other	Adsorption	en
dc.subject.other	Bioelectric phenomena	en
dc.subject.other	Carbon fibers	en
dc.subject.other	Carbon nanofibers	en
dc.subject.other	Dyes	en
dc.subject.other	Electrolytes	en
dc.subject.other	Fibers	en
dc.subject.other	Fluorine containing polymers	en
dc.subject.other	Oxygen	en
dc.subject.other	Pyrolysis	en
dc.subject.other	X ray photoelectron spectroscopy	en
dc.subject.other	Cyclic voltammetry	en
dc.title	Surface modification of pyrolyzed carbon fibres by cyclic voltammetry and their characterization with XPS and dye adsorption	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.electacta.2009.09.068	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.electacta.2009.09.068	en
heal.language	English	en
heal.publicationDate	2010	en
heal.abstract	Commercial carbon fibres were pyrolyzed up to 1000 degrees C and were then electrochemically treated by cyclic voltammetry in aqueous electrolyte solutions of H2SO4, in two potential sweep ranges: a narrow region, N, and a wide region, W, avoiding and including water decomposition, respectively. The anodic and cathodic peaks were correlated with oxide formation and their partial reduction, respectively. The nature of oxygen containing groups on the fibre surfaces was determined by XPS. Wide scan spectra and high energy resolution spectra were recorded through the C 1s, O 1s, N 1s and S 2p photoelectron regions. The ability of the fibres to adsorb methylene blue and alizarin yellow dyes from their aqueous solutions indicates the presence of electron acceptor or donor groups on the fibres, respectively. The carbon fibres were classified into two categories. The first includes electrochemically untreated and treated in the N region, and the second those treated in the W region. The high oxygen concentration and effective dye adsorption on the carbon fibres in the second category indicates that their surfaces were effectively modified. The adsorption of dyes on carbon fibres constitutes a complementary method to XPS for an indirect estimation of oxygen and other groups present on the carbon fibre surfaces. (c) 2009 Elsevier Ltd. All rights reserved.	en
heal.publisher	PERGAMON-ELSEVIER SCIENCE LTD	en
heal.journalName	Electrochimica Acta	en
dc.identifier.doi	10.1016/j.electacta.2009.09.068	en
dc.identifier.isi	ISI:000274020200083	en
dc.identifier.volume	55	en
dc.identifier.issue	3	en
dc.identifier.spage	1207	en
dc.identifier.epage	1216	en