Effect of various structure directing agents on the physicochemical properties of the silica aerogels prepared at an ambient pressure

Handle URI:
http://hdl.handle.net/10754/563136
Title:
Effect of various structure directing agents on the physicochemical properties of the silica aerogels prepared at an ambient pressure
Authors:
Sarawade, Pradip; Shao, Godlistennamwel; Quang, Dangviet; Kim, Heetaik
Abstract:
We studied the effects of various surfactants on the textural properties (BET surface area, pore size, and pore volume) of the silica aerogels prepared at an ambient pressure. A simple surface modification of silica gel prepared at an ambient pressure through hydrolysis and polycondensation of TEOS as asilica precursor was conducted using various structure directing agents. The treatment was found to induce a significant difference in the porosity of the silica aerogel. Highly porous silica aerogels with bimodal porous structures were prepared by modifying the surface of the silica wet-gel (alcogel) with trimethylchlorosilane (TMCS) in order to preserve its porosity. The samples were analyzed by small-angle X-ray scattering and nitrogen adsorption. In this work, a possible new type of highly porous hydrophobic silica aerogel with a bimodal porous structure is presented. A hydrophilic extremely porous (high surface area and large pore volume) silica aerogel was obtained by heating the as-synthesized hydrophobic silica aerogel at 400°C for 1 h. There was a significant effect of structure directing agent on the textural properties, such as specific surface area, pore size distribution and cumulative pore volume of the silicaaerogels. © 2013 Elsevier B.V. All rights reserved.
KAUST Department:
KAUST Catalysis Center (KCC)
Publisher:
Elsevier BV
Journal:
Applied Surface Science
Issue Date:
Dec-2013
DOI:
10.1016/j.apsusc.2013.09.072
Type:
Article
ISSN:
01694332
Sponsors:
This work was supported by the research fund of Hanyang University (HY-2011-P).
Appears in Collections:
Articles; KAUST Catalysis Center (KCC)

Full metadata record

DC FieldValue Language
dc.contributor.authorSarawade, Pradipen
dc.contributor.authorShao, Godlistennamwelen
dc.contributor.authorQuang, Dangvieten
dc.contributor.authorKim, Heetaiken
dc.date.accessioned2015-08-03T11:36:38Zen
dc.date.available2015-08-03T11:36:38Zen
dc.date.issued2013-12en
dc.identifier.issn01694332en
dc.identifier.doi10.1016/j.apsusc.2013.09.072en
dc.identifier.urihttp://hdl.handle.net/10754/563136en
dc.description.abstractWe studied the effects of various surfactants on the textural properties (BET surface area, pore size, and pore volume) of the silica aerogels prepared at an ambient pressure. A simple surface modification of silica gel prepared at an ambient pressure through hydrolysis and polycondensation of TEOS as asilica precursor was conducted using various structure directing agents. The treatment was found to induce a significant difference in the porosity of the silica aerogel. Highly porous silica aerogels with bimodal porous structures were prepared by modifying the surface of the silica wet-gel (alcogel) with trimethylchlorosilane (TMCS) in order to preserve its porosity. The samples were analyzed by small-angle X-ray scattering and nitrogen adsorption. In this work, a possible new type of highly porous hydrophobic silica aerogel with a bimodal porous structure is presented. A hydrophilic extremely porous (high surface area and large pore volume) silica aerogel was obtained by heating the as-synthesized hydrophobic silica aerogel at 400°C for 1 h. There was a significant effect of structure directing agent on the textural properties, such as specific surface area, pore size distribution and cumulative pore volume of the silicaaerogels. © 2013 Elsevier B.V. All rights reserved.en
dc.description.sponsorshipThis work was supported by the research fund of Hanyang University (HY-2011-P).en
dc.publisherElsevier BVen
dc.subjectBimodal porous structureen
dc.subjectHydrophilicen
dc.subjectSilica aerogelen
dc.subjectSurface modificationen
dc.subjectSurfactanten
dc.titleEffect of various structure directing agents on the physicochemical properties of the silica aerogels prepared at an ambient pressureen
dc.typeArticleen
dc.contributor.departmentKAUST Catalysis Center (KCC)en
dc.identifier.journalApplied Surface Scienceen
dc.contributor.institutionDepartment of Fine Chemical Engineering, Hanyang University, Ansan-Si, Gyeonggi-do, South Koreaen
kaust.authorSarawade, Pradipen
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