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Article: Thermal decomposition of carbon precursors in decorated AFI zeolite crystals

TitleThermal decomposition of carbon precursors in decorated AFI zeolite crystals
Authors
KeywordsMass Spectrometry
Positive Ions
Pyrolysis
Synthesis (Chemical)
Thermogravimetric Analysis
Zeolites
Issue Date2006
PublisherAmerican Chemical Society. The Journal's web site is located at http://pubs.acs.org/journal/jpcbfk
Citation
Journal Of Physical Chemistry B, 2006, v. 110 n. 39, p. 19285-19290 How to Cite?
AbstractMass spectrometry and thermogravimetric analysis are used to explore the thermal decomposition of carbon precursors (primarily the tripropylammonium cations) occluded within AlPO 4-5 (API) crystals prepared in various media (in the presence or absence of F - ions, Si 4+ substations of P 5+), with the aim to fabricate high-density 0.4-nm single-walled carbon nanotubes (SWNTs). It has been found that the tripropylammonium precursors exist in the as-synthesized crystals in three different forms: tripropylammonium fluoride, hydroxide, and tripropylammonium cation compensating for the negative charge of the framework. The latter is bonded to the framework by strong chemical interaction and its decomposition takes place by a series of β-elimination reactions to give propylene and ammonia, with the stepwise formation of dipropylammonium and n-propylammonium cations. The 0.4-nm SWNTs filling density was found to be higher than that resulting from the carbon precursor of tripropylammonium fluoride and hydroxide, because of the strong adsorption force of the channel walls to pyrolysate, as evidenced by the clear and strong radial breathing modes in Raman spectra. © 2006 American Chemical Society.
Persistent Identifierhttp://hdl.handle.net/10722/132385
ISSN
2015 Impact Factor: 3.187
2015 SCImago Journal Rankings: 1.414
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorZhai, JPen_HK
dc.contributor.authorTang, ZKen_HK
dc.contributor.authorLam, FLYen_HK
dc.contributor.authorHu, Xen_HK
dc.date.accessioned2011-03-28T09:23:54Z-
dc.date.available2011-03-28T09:23:54Z-
dc.date.issued2006en_HK
dc.identifier.citationJournal Of Physical Chemistry B, 2006, v. 110 n. 39, p. 19285-19290en_HK
dc.identifier.issn1520-6106en_HK
dc.identifier.urihttp://hdl.handle.net/10722/132385-
dc.description.abstractMass spectrometry and thermogravimetric analysis are used to explore the thermal decomposition of carbon precursors (primarily the tripropylammonium cations) occluded within AlPO 4-5 (API) crystals prepared in various media (in the presence or absence of F - ions, Si 4+ substations of P 5+), with the aim to fabricate high-density 0.4-nm single-walled carbon nanotubes (SWNTs). It has been found that the tripropylammonium precursors exist in the as-synthesized crystals in three different forms: tripropylammonium fluoride, hydroxide, and tripropylammonium cation compensating for the negative charge of the framework. The latter is bonded to the framework by strong chemical interaction and its decomposition takes place by a series of β-elimination reactions to give propylene and ammonia, with the stepwise formation of dipropylammonium and n-propylammonium cations. The 0.4-nm SWNTs filling density was found to be higher than that resulting from the carbon precursor of tripropylammonium fluoride and hydroxide, because of the strong adsorption force of the channel walls to pyrolysate, as evidenced by the clear and strong radial breathing modes in Raman spectra. © 2006 American Chemical Society.en_HK
dc.languageengen_US
dc.publisherAmerican Chemical Society. The Journal's web site is located at http://pubs.acs.org/journal/jpcbfken_HK
dc.relation.ispartofJournal of Physical Chemistry Ben_HK
dc.subjectMass Spectrometryen_US
dc.subjectPositive Ionsen_US
dc.subjectPyrolysisen_US
dc.subjectSynthesis (Chemical)en_US
dc.subjectThermogravimetric Analysisen_US
dc.subjectZeolitesen_US
dc.titleThermal decomposition of carbon precursors in decorated AFI zeolite crystalsen_HK
dc.typeArticleen_HK
dc.identifier.emailLam, FLY:kefrank@hku.hken_HK
dc.identifier.authorityLam, FLY=rp01470en_HK
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1021/jp063633uen_HK
dc.identifier.scopuseid_2-s2.0-33750371467en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-33750371467&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume110en_HK
dc.identifier.issue39en_HK
dc.identifier.spage19285en_HK
dc.identifier.epage19290en_HK
dc.identifier.isiWOS:000240825900032-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridZhai, JP=35917837300en_HK
dc.identifier.scopusauthoridTang, ZK=7403305942en_HK
dc.identifier.scopusauthoridLam, FLY=7102075931en_HK
dc.identifier.scopusauthoridHu, X=7404709975en_HK

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