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Journal of Materials Science
Erschienen in: Journal of Materials Science 19/2017

05.07.2017 | Chemical routes to materials

Effects of catalysts state on the synthesis of MWCNTs modified expanded graphite through microwave-assisted pyrolysis of ethanol

verfasst von: Ning Liao, Yawei Li, Shengli Jin, Gengfu Liu, Qijin Wan, Shaobai Sang, Dandan Su

Erschienen in: Journal of Materials Science | Ausgabe 19/2017

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Abstract

Multi-walled carbon nanotubes (MWCNTs) were prepared through microwave-assisted pyrolysis of ethanol to enhance the electron transfer of expanded graphite (EG). Three kinds of Fe-containing catalyst precursors (ferric nitrate, citric acid-enhanced ferric nitrate and ferrocene) were designated in the present work to investigate the influences of catalyst states on the formation of MWCNT. The cyclic voltammograms and electrochemical impedance of the prepared specimens were characterized. Furthermore, the microstructures of catalyst-loaded EG before and after microwave treatment were investigated by means of SEM and TEM. The results show that the growth of MWCNT under microwave treatment is determined by the state of catalyst and only nanoscaled Fe-containing catalysts favor the formation of MWCNT. The ferric nitrate tends to grow up into submicron Fe2O3 particles, which impedes the growth of MWCNT. In comparison, citric acid enhances the dispersion of ferric nitrate, allowing the growth of MWCNT. Ferrocene possesses dual functions, namely it assures well distribution of nanoscaled catalysts and is also responsible for the growth of first generation of MWCNT. With the growth of MWCNT on EG, the anodic peak current densities and charge transfer resistance of the MWCNT modified EG outperform those of pure EG remarkably.
Vorheriger Artikel Facile preparation of superhydrophobic PDMS with patternable and controllable water adhesion characteristics
Nächster Artikel Synthesis and characterization of direct Z-scheme Bi2MoO6/ZnIn2S4 composite photocatalyst with enhanced photocatalytic oxidation of NO under visible light

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Metadaten
Titel
Effects of catalysts state on the synthesis of MWCNTs modified expanded graphite through microwave-assisted pyrolysis of ethanol
verfasst von
Ning Liao
Yawei Li
Shengli Jin
Gengfu Liu
Qijin Wan
Shaobai Sang
Dandan Su
Publikationsdatum
05.07.2017
Verlag
Springer US
Erschienen in
Journal of Materials Science / Ausgabe 19/2017
Print ISSN: 0022-2461
Elektronische ISSN: 1573-4803
DOI
https://doi.org/10.1007/s10853-017-1333-x

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