Polymer-derived SiOC aerogel with hierarchical porosity through HF etching

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dc.contributor.authorAssefa, Dawit
dc.contributor.authorZera, Emanuele
dc.contributor.authorCampostrini, Renzo
dc.contributor.authorSoraru, Gian Domenico
dc.contributor.authorVakıfahmetoglu, Cekdar
dc.date.accessioned2021-05-15T12:37:04Z
dc.date.available2021-05-15T12:37:04Z
dc.date.issued2016
dc.departmentMühendislik ve Doğa Bilimleri Fakültesi, Makine Mühendisliği Bölümüen_US
dc.descriptionVakifahmetoglu, Cekdar/0000-0003-1222-4362
dc.description.abstractSilicon oxycarbide (SiOC) aerogels have been synthesized from preceramic polymers via pyrolysis in inert atmosphere at 1200 and 1300 degrees C. The as synthesized materials have a typical colloidal microstructure with mesoporosity in the range 10-50 nm and no microporosity. HF acid attack of the SiOC aerogels dissolves preferentially the SiO2-rich phase and creates micro-and (small)mesopores (<10 nm) in the aerogels microstructure finally leading to a materials with hierarchical porosity. The HF post-pyrolysis treatment is more efficient for the SiOC aerogels pyrolyzed at the maximum temperature, i.e. 1300 degrees C, leading to a maximum value of specific surface area of 530 m(2)/g and total porosity of 0.649 cc/g. (C) 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved.en_US
dc.description.sponsorshipFondazione Cassa di Risparmio di Trento e Roveretoen_US
dc.description.sponsorshipG.D.S. and R.C. are grateful to the "Fondazione Cassa di Risparmio di Trento e Rovereto" for the financial support of this research under the contract: Polymer-derived ceramics with hierarchical porosity for water filtration/purification.en_US
dc.identifier.doi10.1016/j.ceramint.2016.04.101
dc.identifier.endpage11809en_US
dc.identifier.issn0272-8842
dc.identifier.issn1873-3956
dc.identifier.issue10en_US
dc.identifier.scopus2-s2.0-84992293227
dc.identifier.scopusqualityQ1
dc.identifier.startpage11805en_US
dc.identifier.urihttps://doi.org/10.1016/j.ceramint.2016.04.101
dc.identifier.urihttps://hdl.handle.net/20.500.12939/470
dc.identifier.volume42en_US
dc.identifier.wosWOS:000377733500038
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.institutionauthorVakıfahmetoglu, Cekdar
dc.language.isoen
dc.publisherElsevier Sci Ltden_US
dc.relation.ispartofCeramics International
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectPreceramic Polymersen_US
dc.subjectSiOCen_US
dc.subjectHighSurface Areaen_US
dc.subjectAerogelsen_US
dc.subjectHF Etchingen_US
dc.titlePolymer-derived SiOC aerogel with hierarchical porosity through HF etching
dc.typeArticle

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