The effect of process variables on the properties of nanoporous silica aerogels: an approach to prepare silica aerogels from biosilica

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dc.authorid0000-0003-4114-7044en_US
dc.contributor.authorTemel, Tulay Merve
dc.contributor.authorIkizler, Burcu Karakuzu
dc.contributor.authorTerzioğlu, Pınar
dc.contributor.authorYucel, Sevil
dc.contributor.authorElalmis, Yeliz Basaran
dc.date.accessioned2021-03-20T20:13:41Z
dc.date.available2021-03-20T20:13:41Z
dc.date.issued2017
dc.departmentBTÜ, Mühendislik ve Doğa Bilimleri Fakültesi, Polimer Malzeme Mühendisliği Bölümüen_US
dc.description.abstractSilica aerogel, a nanoporous material, was produced by using rice husk ash via sol-gel method. The aim of the study is to examine effects of the acid type (acetic, hydrochloric, nitric, oxalic and sulfuric acid), dryer type (air, freeze, oven and vacuum) and the addition of tetraethyl orthosilicate on the structural and physical properties of aerogels produced from rice husk ash. In addition, this is the first study investigating the effect of vacuum oven drying on the structure of rice husk based silica aerogel. Specific surface area and pore size of obtained silica aerogels have been analyzed by the N-2 adsorption and desorption measurements at 77 K via Brunauer-Emmett-Teller (BET) and Barrett-Joiner-Halenda (BJH) methods, respectively. Surface functional groups were determined with fourier transform infrared spectroscopy (FTIR). Surface morphology was examined with scanning electron microscopy (SEM). Moreover, density was calculated by tapping method. The results showed that all of the variables had remarkable effects on the final properties of the silica aerogel. The BET specific surface area of the silica aerogels increased with the addition of tetraethyl orthosilicate, while the tapping density decreased. The BET specific surface area and pore size of silica aerogels varied between 140.7-322.5 m(2) g(-1), and 5.38-12.05 nm, respectively. Silica aerogel which was obtained by using oxalic acid, tetraethyl orthosilicate addition and air dryer had the highest BET specific surface area (322.5 m(2) g(-1)).en_US
dc.description.sponsorshipYildiz Technical University Projects Office [2015-07-04-KAP-05]en_US
dc.description.sponsorshipThis research is supported by Yildiz Technical University Projects Office (Project No: 2015-07-04-KAP-05).en_US
dc.identifier.doi10.1007/s10971-017-4469-xen_US
dc.identifier.endpage59en_US
dc.identifier.issn0928-0707
dc.identifier.issn1573-4846
dc.identifier.issue1en_US
dc.identifier.scopusqualityQ2en_US
dc.identifier.startpage51en_US
dc.identifier.urihttp://doi.org/10.1007/s10971-017-4469-x
dc.identifier.urihttps://hdl.handle.net/20.500.12885/921
dc.identifier.volume84en_US
dc.identifier.wosWOS:000411341300008en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.institutionauthorTerzioğlu, Pınar
dc.language.isoenen_US
dc.publisherSpringeren_US
dc.relation.ispartofJournal Of Sol-Gel Science And Technologyen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectDryer typeen_US
dc.subjectDrying methoden_US
dc.subjectRice husk ashen_US
dc.subjectSilica aerogelen_US
dc.subjectSol-gel methoden_US
dc.subjectTetraethyl orthosilicateen_US
dc.titleThe effect of process variables on the properties of nanoporous silica aerogels: an approach to prepare silica aerogels from biosilicaen_US
dc.typeArticleen_US

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