Hierarchically Organized and Anisotropic Porous Carbon Monoliths.
Journal
Chemistry of materials : a publication of the American Chemical Society
ISSN: 0897-4756
Titre abrégé: Chem Mater
Pays: United States
ID NLM: 9884133
Informations de publication
Date de publication:
12 May 2020
12 May 2020
Historique:
received:
23
01
2020
revised:
17
04
2020
entrez:
19
5
2020
pubmed:
19
5
2020
medline:
19
5
2020
Statut:
ppublish
Résumé
Anisotropy is a key factor regarding mechanical or transport properties and thus the functionality of porous materials. However, the ability to deliberately design the pore structure of hierarchically organized porous networks toward anisotropic features is limited. Here, we report two straightforward routes toward hierarchically structured porous carbon monoliths with an anisotropic alignment of the microstructure on the level of macro- and mesopores. One approach is based on nanocasting (NC) of carbon precursors into hierarchical and anisotropic silica hard templates. The second route, a direct synthesis approach based on soft templating (ST), makes use of the flexibility of hierarchically structured resorcinol-formaldehyde gels, which are compressed and simultaneously carbonized in the deformed state. We present structural data of both types of carbon monoliths obtained by electron microscopy, nitrogen adsorption analysis, and SAXS measurements. In addition, we demonstrate how the degree of anisotropy can easily be controlled via the ST route.
Identifiants
pubmed: 32421084
doi: 10.1021/acs.chemmater.0c00302
pmc: PMC7222333
doi:
Types de publication
Journal Article
Langues
eng
Pagination
3944-3951Informations de copyright
Copyright © 2020 American Chemical Society.
Déclaration de conflit d'intérêts
The authors declare no competing financial interest.
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