Characterization of Calcium-Doped Silica Gel Prepared in an Aqueous Solution

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dc.contributor.authorQuang, Dang Viet
dc.contributor.authorPark, Jin Koo
dc.contributor.authorKim, Jong-gil
dc.contributor.authorElineema, Gideon
dc.contributor.authorShao, Godlisten N.
dc.contributor.authorLee, Jae Eun
dc.contributor.authorKim, Hee Taik
dc.date.accessioned2016-05-16T14:06:29Z
dc.date.available2016-05-16T14:06:29Z
dc.date.issued2012-02-20
dc.description.abstractIn this study, calcium-doped silica was prepared by modifying sodium silicate-based silica gel in an aqueous solution of Ca(OH)2. Silica gels with less than 1 mm in size with different pH values were treated in Ca(OH)2 solution at concentrations ranging from 2 to 20 g/L and aged at 25, 60, and 90°C for 40 min. The BET surface area of the silica gel decreased while its pore size increased considerably after modification in Ca(OH)2 solution. The pH of 5% calcium-doped silica in water ranged from about 8.5 to 10, depending on the pH of silica gel, the aging temperature, and the concentration of the Ca(OH)2. When the concentration of the Ca(OH)2 solution was 20%, needle-like crystals of calcium silicate hydrate formed over the surface of silica gel.en_US
dc.identifier.urihttp://hdl.handle.net/20.500.11810/2078
dc.language.isoen_USen_US
dc.publisherResources Processingen_US
dc.titleCharacterization of Calcium-Doped Silica Gel Prepared in an Aqueous Solutionen_US
dc.typeJournal Article, Peer Revieweden_US
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