XPS study of carbon fiber surfaces treated by thermal oxidation in a gas mixture of O2/(O2+N2)

Lee, W.H; Lee, J.G; Reucroft, P. J.

doi:10.1016/s0169-4332(00)00558-4

Cited by 192 publications

(78 citation statements)

References 14 publications

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“…The C1s peak of each material was deconvoluted to several Gaussian peaks by peak analysis program obtained from Unipress Co., USA. In the C1s peak at 284.5 eV, four different peaks obtained at 284.4 eV, 286.0 eV, 287.6 eV and 290.1 eV, assigned to C-C, C-O-R or C-NR 2 , C=O and O-C=O, respectively [23]. Thus, it can be concluded that three kinds of functional groups were induced during acid treatment.…”

Section: Resultsmentioning

confidence: 90%

X-ray Photoelectron Spectroscopy Study of Cobalt Supported Multi-walled Carbon Nanotubes Prepared by Different Precursors

Lee¹,

Kim²,

Lim³

et al. 2007

Carbon letters

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The effect of cobalt precursor on the structure of Co supported multi-walled carbon nanotubes (MWCNTs) were studied by using X-ray photoelectron spectroscopy (XPS). MWCNTs were treated with a mixture of nitric and sulfuric acids and decorated with cobalt and/or cobalt oxides via aqueous impregnation solutions of cobalt nitrate or cobalt acetate followed by reduction in hydrogen. XPS was mainly used to investigate the phase of cobalt on MWCNTs after reduction with H 2 flow at 400 o C for 2 h. Higher cobalt-nanoparticle dispersion was found in the MWCNTS prepared via cobalt nitrate decomposition. A typical XPS spectrum of Co 2p showed the peaks at binding energy (BE) values equal to 781 and 797 eV, respectively. It is found that cobalt nitrate supported MWCNTs is more dispersive and have catalytic activity than that of cobalt acetate supported MWCNTs at same preparation condition such as concentration of precursor solution and reduction environment.

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Section: Resultsmentioning

confidence: 90%

X-ray Photoelectron Spectroscopy Study of Cobalt Supported Multi-walled Carbon Nanotubes Prepared by Different Precursors

Lee¹,

Kim²,

Lim³

et al. 2007

Carbon letters

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“…For CA, CB and CA-OX three oxygen environments at 531.2 eV, 533.0 eV and 535.7 eV can be distinguished. These peaks were assigned to carbonyl, carbon-oxygen single bond and chemisorbed water, respectively [44]. The N 1s peak deconvolution also shows a number of different chemical environments that include pyridine-N-oxides, pyrrolic and chemisorbed nitroxides at 399.6 eV, 401.4 eV and 405.5 eV, respectively [43].…”

Section: Surface Composition Of Carbon Fibresmentioning

confidence: 99%

Carbon fibre reinforced poly(vinylidene fluoride): Impact of matrix modification on fibre/polymer adhesion

Tran

Kalinka

et al. 2008

Composites Science and Technology

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“…With respect to the latter, graphite in carbon nanofiber is less ordered and has been reported to have a C 1s graphitic peak at 284.5 eV, and may not show a C 1s peak shift when treated in an ammonia mixture [35]. The remaining five C 1s bonding states can be assigned to the bonding of carbon to oxygen on the surface in the form of various functional groups [36][37][38]. The peak found at 286.5 eV (C III ) can be assigned to C-O-R (R= C, H), which can either be an epoxy (C-O), ether (C-O-C), or hydroxyl (C-OH) group.…”

Section: Changes In Carbon Fiber Propertiesmentioning

confidence: 99%

“…In one study, Ismagilov et al showed that the C 1s peak shifted to higher binding energies from 284.3 to 284.6 eV for an 8.2 wt.% nitrogen doped carbon fiber, which was due to the increased structural disorder in the graphitic network [29]. For route 2, there are notable differences for the remaining C 1s bonding states, which can also be assigned to different bonding functionalities of carbon-oxygen on the surface [36][37][38]. Unlike route 1, the C-C sp 3 hybridized bonding state is not evident.…”

Section: Changes In Carbon Fiber Propertiesmentioning

confidence: 99%

Nitrogen Doped Carbon Nanofibers Derived from Water-Soluble Precursors

Cremar¹,

Jones²,

Martínez³

et al. 2017

JAN

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Abstract. Nitrogen doped carbon fibers were synthesized from polyvinyl alcohol (PVA), a water soluble precursor. The PVA fine fibers were first developed by centrifugally spinning an aqueous based solution using Forcespinning® technology. The precursor fibers were then exposed to sulfuric acid vapors to partially carbonize and stabilize the fibers for further heat treatment. For nitrogen doping, the fibers were exposed to two different heat treatment routes. One was under a nitrogen atmosphere at 850°C followed by exposure to ammonia gas at 500°C. The second route consisted of heating the treated fibers in pure ammonia gas only, up to 850°C. Both heating schemes resulted in carbon based fibers that showed evidence of nitrogen content as shown by energy-dispersive X-ray spectroscopy. The second route showed an effective doping of the carbon fiber with nitrogen atoms, measured by X-ray photoelectron spectroscopy, which indicated that the nitrogen atoms were fully incorporated into the carbon framework.

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XPS study of carbon fiber surfaces treated by thermal oxidation in a gas mixture of O2/(O2+N2)

Cited by 192 publications

References 14 publications

X-ray Photoelectron Spectroscopy Study of Cobalt Supported Multi-walled Carbon Nanotubes Prepared by Different Precursors

X-ray Photoelectron Spectroscopy Study of Cobalt Supported Multi-walled Carbon Nanotubes Prepared by Different Precursors

Carbon fibre reinforced poly(vinylidene fluoride): Impact of matrix modification on fibre/polymer adhesion

Nitrogen Doped Carbon Nanofibers Derived from Water-Soluble Precursors

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