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In Situ recrystallization of silica template for synthesis of novel microporous ZSM-5/hollow mesoporous carbon composites / Suk Bon Yoon in Industrial & engineering chemistry research, Vol. 50 N° 13 (Juillet 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 13 (Juillet 2011) . - pp.7998-8005 Titre : In Situ recrystallization of silica template for synthesis of novel microporous ZSM-5/hollow mesoporous carbon composites Type de document : texte imprimé Auteurs : Suk Bon Yoon, Auteur ; Jong - Yun Kim, Auteur ; Seung - Kyu Park, Auteur Année de publication : 2011 Article en page(s) : pp.7998-8005 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Microporous  Mesoporous  carbon  Composites Résumé : Silica-based nanocasting synthesis of a nanostructured carbon replica inevitably involves the disposal of silica waste and toxic etchant after the time-consuming and costly etching processes for selective removal of silica template from a carbon/silica composite to produce the silica-free carbon replica, not only resulting in chemical waste, but also posing serious environmental concerns. Instead of removal of the silica template, the in situ recrystallization transformation of the silica into more useful functional nanostructured silica offers an attractive alternative to the problem of handling silica waste and toxic etchants. In this work, the novel composites composed of microporous zeolite ZSM-5 crystals and hollow core-mesoporous shell carbon (HCMSC) capsules are synthesized for the first time by such transformation process of sacrificial silica template in the carbon/solid core-mesoporous shell silica (SCMSS) composite through hydrothermal process under alkaline condition. Compared to the commercial filter materials, the zeolite/HCMSC composite (BET surface area: 532600 m2/g) possessing a wide range of pore sizes, i.e., micropores from zeolites, mesopores from the outer shells, and macropores from the hollow core of the carbon capsules reveals the outstanding adsorption capacity for the typical malodorous acetaldehyde. DEWEY : 660 ISSN : 0888-5885 En ligne : http://www.mendeley.com/research/situ-recrystallization-silica-template-synthesi [...] [article] In Situ recrystallization of silica template for synthesis of novel microporous ZSM-5/hollow mesoporous carbon composites [texte imprimé] / Suk Bon Yoon, Auteur ; Jong - Yun Kim, Auteur ; Seung - Kyu Park, Auteur . - 2011 . - pp.7998-8005. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 13 (Juillet 2011) . - pp.7998-8005 Mots-clés : Microporous  Mesoporous  carbon  Composites Résumé : Silica-based nanocasting synthesis of a nanostructured carbon replica inevitably involves the disposal of silica waste and toxic etchant after the time-consuming and costly etching processes for selective removal of silica template from a carbon/silica composite to produce the silica-free carbon replica, not only resulting in chemical waste, but also posing serious environmental concerns. Instead of removal of the silica template, the in situ recrystallization transformation of the silica into more useful functional nanostructured silica offers an attractive alternative to the problem of handling silica waste and toxic etchants. In this work, the novel composites composed of microporous zeolite ZSM-5 crystals and hollow core-mesoporous shell carbon (HCMSC) capsules are synthesized for the first time by such transformation process of sacrificial silica template in the carbon/solid core-mesoporous shell silica (SCMSS) composite through hydrothermal process under alkaline condition. Compared to the commercial filter materials, the zeolite/HCMSC composite (BET surface area: 532600 m2/g) possessing a wide range of pore sizes, i.e., micropores from zeolites, mesopores from the outer shells, and macropores from the hollow core of the carbon capsules reveals the outstanding adsorption capacity for the typical malodorous acetaldehyde. DEWEY : 660 ISSN : 0888-5885 En ligne : http://www.mendeley.com/research/situ-recrystallization-silica-template-synthesi [...]