Mera, Gabriela ; Kroll, Peter ; Ponomarev, Ilia ; Chen, Jiewei ; Morita, Koji ; Liesegang, Moritz ; Ionescu, Emanuel ; Navrotsky, Alexandra (2019)
Metal-Catalyst-Free Access to Multiwall Carbon Nanotubes/Silica Nanocomposites (MWCNT/SiO2) from a Single-Source Precursor.
In: Dalton Transactions, 48 (29)
doi: 10.1039/C9DT01783F
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
The present study introduces a facile single-source precursor preparative access to bamboo-like multiwalled carbon nanotubes (MWCNTs) highly dispersed within a mesoporous silica-rich matrix. The metal-free single-source precursor was synthesized via a one-pot sol-gel process using tetramethyl orthosilicate (TMOS) and 4,4′-dihydroxybiphenyl (DHBP) and converted subsequently via pyrolysis in argon atmosphere into MWCNT/silica nanocomposites. The in-situ segregation of the highly defective bamboo-like MWCNTs was carefully investigated and has been shown to occur within the mesopores of the silica-rich matrix at relatively low temperatures and without the use of a metal catalyst. The experimental results have been supported by extensive computational simulations, which correlate the molecular architecture of the single-source precursor with the structural features of the carbon phase segregating from the silica matrix. Furthermore, the role of hydrogen on the stability of the prepared nanocomposites as well as on the high-temperature evolution and morphology of the segregated MWCNTs has been discussed based on vibrational spectroscopy, calorimetric studies and empirical potential calculations. The results attained within the present study may allow for designing highly-defined nanocarbon-containing composites with tailored structural features and property profiles.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2019 |
| Autor(en): | Mera, Gabriela ; Kroll, Peter ; Ponomarev, Ilia ; Chen, Jiewei ; Morita, Koji ; Liesegang, Moritz ; Ionescu, Emanuel ; Navrotsky, Alexandra |
| Art des Eintrags: | Bibliographie |
| Titel: | Metal-Catalyst-Free Access to Multiwall Carbon Nanotubes/Silica Nanocomposites (MWCNT/SiO2) from a Single-Source Precursor |
| Sprache: | Englisch |
| Publikationsjahr: | 11 Juni 2019 |
| Verlag: | Royal Society of Chemistry |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Dalton Transactions |
| Jahrgang/Volume einer Zeitschrift: | 48 |
| (Heft-)Nummer: | 29 |
| DOI: | 10.1039/C9DT01783F |
| URL / URN: | https://pubs.rsc.org/en/content/articlelanding/2019/dt/c9dt0... |
| Kurzbeschreibung (Abstract): | The present study introduces a facile single-source precursor preparative access to bamboo-like multiwalled carbon nanotubes (MWCNTs) highly dispersed within a mesoporous silica-rich matrix. The metal-free single-source precursor was synthesized via a one-pot sol-gel process using tetramethyl orthosilicate (TMOS) and 4,4′-dihydroxybiphenyl (DHBP) and converted subsequently via pyrolysis in argon atmosphere into MWCNT/silica nanocomposites. The in-situ segregation of the highly defective bamboo-like MWCNTs was carefully investigated and has been shown to occur within the mesopores of the silica-rich matrix at relatively low temperatures and without the use of a metal catalyst. The experimental results have been supported by extensive computational simulations, which correlate the molecular architecture of the single-source precursor with the structural features of the carbon phase segregating from the silica matrix. Furthermore, the role of hydrogen on the stability of the prepared nanocomposites as well as on the high-temperature evolution and morphology of the segregated MWCNTs has been discussed based on vibrational spectroscopy, calorimetric studies and empirical potential calculations. The results attained within the present study may allow for designing highly-defined nanocarbon-containing composites with tailored structural features and property profiles. |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Disperse Feststoffe |
| Hinterlegungsdatum: | 25 Jul 2019 05:30 |
| Letzte Änderung: | 25 Jul 2019 05:30 |
| PPN: | |
| Projekte: | Deutsche Forschungs Gemeinschaft, Grant IO 83/2-1, National Science Foundation (NSF), CMMI-1634448, National Science Foundation (NSF) through award CMMI-1634448, Deutsche Forschungs Gemeinschaft, Grant IO 64/14-1, A.P. Sloan Foundation Deep Carbon Observatory |
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