Details

Autor(en) / Beteiligte

• Jirglová, Hana
• Pérez-Cadenas, Agustín F
• Maldonado-Hódar, Francisco J

Titel

Synthesis and Properties of Phloroglucinol−Phenol−Formaldehyde Carbon Aerogels and Xerogels

Ist Teil von

• Langmuir, 2009-02, Vol.25 (4), p.2461-2466

Ort / Verlag

Washington, DC: American Chemical Society

Erscheinungsjahr

2009

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• 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.