EPR Spectra of Aerosol Particles Formed by Pyrolysis of C3H8 plus Ar and C3H8 plus Fe(CO) 5 plus Ar Mixtures in a Flow Reactor Full article
Journal |
Applied Magnetic Resonance
ISSN: 0937-9347 , E-ISSN: 1613-7507 |
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Output data | Year: 2009, Volume: 35, Number: 4, Pages: 625-637 Pages count : 13 DOI: 10.1007/s00723-009-0191-3 | ||||||||
Tags | Electron Paramagnetic Resonance; Electron Paramagnetic Resonance Spectrum; Aerosol Particle; Electron Paramagnetic Resonance Signal Soot Particle | ||||||||
Authors |
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Affiliations |
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Funding (1)
1 | Russian Foundation for Basic Research | 07-03-00643 |
Abstract:
The paper is devoted to electron paramagnetic resonance investigation of nanoparticles and aggregates of nanoparticles formed by pyrolysis of propane as well as a mixture of propane and iron pentacarbonyl. The measurement showed that the pyrolysis of the C3H8 plus Ar mixture results in the formation of a carbonaceous phase (phase I), which is quite different from that formed by the C3H8 plus Fe(CO)5 plus Ar mixture (phase II). In phase I there is a strong oxygen effect for as-prepared samples; 75% of spins are accessible to the environmental gas via the interconnected system of microvoids and microchannels. In phase II there was a weak oxygen effect for the as-prepared samples. However, after exposition of phase II to air for 160 h, the properties of phase II have become about the same as that of phase I. A strong oxygen effect was observed for the air-exposed phase II. The line width for phase II increases monotonically with the iron content in the sample. This increase is probably related to the dipole-dipole interactions between the radical centers and the iron atoms distributed throughout the carbon matrix.
Cite:
Ivanova N.A.
, Onishchuk A.A.
, Vosel S.V.
, Purtov P.A.
, Kulik L.V.
, Rapatskiy L.L.
, Vasenin N.T.
, Anufrienko V.F.
EPR Spectra of Aerosol Particles Formed by Pyrolysis of C3H8 plus Ar and C3H8 plus Fe(CO) 5 plus Ar Mixtures in a Flow Reactor
Applied Magnetic Resonance. 2009. V.35. N4. P.625-637. DOI: 10.1007/s00723-009-0191-3 WOS Scopus РИНЦ
EPR Spectra of Aerosol Particles Formed by Pyrolysis of C3H8 plus Ar and C3H8 plus Fe(CO) 5 plus Ar Mixtures in a Flow Reactor
Applied Magnetic Resonance. 2009. V.35. N4. P.625-637. DOI: 10.1007/s00723-009-0191-3 WOS Scopus РИНЦ
Dates:
Submitted: | Jan 13, 2008 |
Published print: | May 1, 2009 |
Published online: | May 15, 2009 |
Identifiers:
Web of science | WOS:000266072400012 |
Scopus | 2-s2.0-65749086268 |
Elibrary | 13607749 |
Chemical Abstracts | 2009:620173 |
Chemical Abstracts (print) | 153:366271 |
OpenAlex | W2081080244 |