Sol-gel chemistry in molten Brønsted acids towards "activated" carbons and beyond.

Autor:	Koyutürk B; Chair of Technical Electrochemistry, Department of Chemistry, Technical University Munich, Lichtenbergstr. 4, 85748 Garching, Germany. Tim.Fellinger@tum.de., Evans J; Chair of Technical Electrochemistry, Department of Chemistry, Technical University Munich, Lichtenbergstr. 4, 85748 Garching, Germany. Tim.Fellinger@tum.de., Multhaupt H; Institute of Chemistry/Chemical Technology, Carl von Ossietzky University of Oldenburg, 26129 Oldenburg, Germany., Selve S; Center for Electron Microscopy (ZELMI), Technical University of Berlin, 10623 Berlin, Germany., Simke JRJ; Center for Electron Microscopy (ZELMI), Technical University of Berlin, 10623 Berlin, Germany., Wark M; Institute of Chemistry/Chemical Technology, Carl von Ossietzky University of Oldenburg, 26129 Oldenburg, Germany., Fellinger TP; Chair of Technical Electrochemistry, Department of Chemistry, Technical University Munich, Lichtenbergstr. 4, 85748 Garching, Germany. Tim.Fellinger@tum.de.
Jazyk:	angličtina
Zdroj:	Nanoscale [Nanoscale] 2019 Jul 11; Vol. 11 (27), pp. 13154-13160.
DOI:	10.1039/c9nr01722d
Abstrakt:	"Chemical activation" using Brønsted acids as chemical agents is widely used to generate activated carbons for various sorption applications. Commercially relevant is especially a process using phosphoric acid as activating agent applied to abundant and inexpensive biomass such as wood or coconut shells. In this manuscript, we revisit the porogenesis mechanism based on experiments involving molecular model compounds and oxygen-free polymer precursors, as well as different molten acids as activating agents. Describing acid activation with principles of sol-gel chemistry results in a more general understanding and uncovers a versatile synthetic tool for materials nanochemistry.
Databáze:	MEDLINE
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