Ott, Alexander ; Rogg, Simone ; Lauterbach, Stefan ; Kleebe, Hans-Joachim ; Hess, Christian ; Mera, Gabriela (2020)
Novel 0D-nanocarbon-silica ceramic composites: sol–gel synthesis and high-temperature evolution.
In: Dalton Transactions, 49 (21)
doi: 10.1039/D0DT01016B
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Herein we report the synthesis of novel 0D-nanocarbon-based silicon-containing ceramic composites by a facile salt-free synthesis method followed by polymer-to-ceramic transformation. 0D-nanocarbon–silica composites were synthesized via a one-pot sol–gel process using tetramethyl orthosilicate (TMOS) and functionalized nanodiamonds and converted subsequently via pyrolysis under an argon atmosphere into nanodiamond/silica nanocomposites. The thermal conversion of the nanodiamond phase to a multilayer fullerene phase was carefully investigated by integral and local characterization methods such as vibrational spectroscopy, X-ray diffraction, BET, SEM and HRTEM. The incorporation of nanodiamonds in a silica matrix enhances the crystallization temperature of the silica phase, as α-cristobalite, to 1500 °C, while their full graphitization is shifted to T > 1700 °C under an argon atmosphere. The thermal decomposition of the nanodiamond/silica composites leads to the formation of materials with a high specific surface area (up to 562 m2 g−1) and a mesoporous structure. No carbothermal reaction of composing phases was identified. The results obtained in the present study allow for designing advanced and highly-defined mesoporous 0D-nanocarbon-containing composites with tailored structural features and multifunctional property profiles.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2020 |
| Autor(en): | Ott, Alexander ; Rogg, Simone ; Lauterbach, Stefan ; Kleebe, Hans-Joachim ; Hess, Christian ; Mera, Gabriela |
| Art des Eintrags: | Bibliographie |
| Titel: | Novel 0D-nanocarbon-silica ceramic composites: sol–gel synthesis and high-temperature evolution |
| Sprache: | Englisch |
| Publikationsjahr: | 1 Mai 2020 |
| Verlag: | Royal Society of Chemistry |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Dalton Transactions |
| Jahrgang/Volume einer Zeitschrift: | 49 |
| (Heft-)Nummer: | 21 |
| DOI: | 10.1039/D0DT01016B |
| URL / URN: | https://pubs.rsc.org/en/content/articlelanding/2020/DT/D0DT0... |
| Kurzbeschreibung (Abstract): | Herein we report the synthesis of novel 0D-nanocarbon-based silicon-containing ceramic composites by a facile salt-free synthesis method followed by polymer-to-ceramic transformation. 0D-nanocarbon–silica composites were synthesized via a one-pot sol–gel process using tetramethyl orthosilicate (TMOS) and functionalized nanodiamonds and converted subsequently via pyrolysis under an argon atmosphere into nanodiamond/silica nanocomposites. The thermal conversion of the nanodiamond phase to a multilayer fullerene phase was carefully investigated by integral and local characterization methods such as vibrational spectroscopy, X-ray diffraction, BET, SEM and HRTEM. The incorporation of nanodiamonds in a silica matrix enhances the crystallization temperature of the silica phase, as α-cristobalite, to 1500 °C, while their full graphitization is shifted to T > 1700 °C under an argon atmosphere. The thermal decomposition of the nanodiamond/silica composites leads to the formation of materials with a high specific surface area (up to 562 m2 g−1) and a mesoporous structure. No carbothermal reaction of composing phases was identified. The results obtained in the present study allow for designing advanced and highly-defined mesoporous 0D-nanocarbon-containing composites with tailored structural features and multifunctional property profiles. |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Geowissenschaften > Fachgebiet Geomaterialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Disperse Feststoffe 07 Fachbereich Chemie 07 Fachbereich Chemie > Eduard Zintl-Institut > Fachgebiet Physikalische Chemie |
| Hinterlegungsdatum: | 04 Jun 2020 05:49 |
| Letzte Änderung: | 16 Aug 2021 12:06 |
| PPN: | |
| Projekte: | German Research Foundation (DFG), Grant Number IO 83/2-1 |
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