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Synthesis and Properties of Phloroglucinol-Phenol-Formaldehyde Carbon Aerogels and Xerogels
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SYSNO ASEP 0322816 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Synthesis and Properties of Phloroglucinol-Phenol-Formaldehyde Carbon Aerogels and Xerogels Title Syntéza a vlastnosti phloroglucinol – phenol – formaldehyd uhlíkatých aerogelů a xerogelů Author(s) Jirglová, Hana (UFCH-W) RID, ORCID
Pérez-Cadenas, A. F. (ES)
Maldonado-Hódar, F. J. (ES)Source Title Langmuir. - : American Chemical Society - ISSN 0743-7463
Roč. 25, č. 4 (2009), s. 2461-2466Number of pages 6 s. Language eng - English Country US - United States Keywords organic aerogels ; immersion calorimetry ; activated carbon Subject RIV CF - Physical ; Theoretical Chemistry CEZ AV0Z40400503 - UFCH-W (2005-2011) UT WOS 000263373600082 DOI 10.1021/la803200b Annotation Carbon aerogels and xerogels were successfully prepared from phloroglucinol-phenol mixtures and characterized by different techniques to determine their potential. We examined the influence of the phloroglucinol/phenol ratio, reactant concentration, cure conditions, and drying method on the morphology and porosity of the samples. The gelation time was found to be independent of the phloroglucinol/phenol ratio in spite of the different reactivities of both monomers. In general, carbon aerogels have a high volume of mesopores and of micropores without diffusion restrictions. Carbon xerogels are denser materials without mesopores but with a well-developed microporosity that shows a strong molecular sieve effect. Therefore, while micro-/mesoporous carbon aerogels can be used as catalyst supports or VOC adsorbents, the microporous carbon xerogel could offer high selectivity in the separation of small Molecules from gaseous mixtures. Workplace J. Heyrovsky Institute of Physical Chemistry Contact Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Year of Publishing 2009
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