Influence of titania content on the mesostructure of titania–silica composites and their photocatalytic activity

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dc.contributor.authorShao, Godlisten N.
dc.contributor.authorHilonga, Askwar
dc.contributor.authorJeon, Sun Jeong
dc.contributor.authorLee, Jae Eun
dc.contributor.authorElineema, Gideon
dc.contributor.authorQuang, Dang Viet
dc.contributor.authorKim, Jong-Kil
dc.contributor.authorKim, Hee Taik
dc.date.accessioned2016-05-16T12:51:14Z
dc.date.available2016-05-16T12:51:14Z
dc.date.issued2012-08-28
dc.description.abstractTitania–silica composites (TSC) with various Ti/Si ratios were synthesized via sol–gel process using less expensive precursors; sodium silicate solution as a silica source and titanium oxychloride as a titania source. The influence of varying Ti content in the composites was examined by FTIR, SEM, TEM, DTA/TGA, N2 physisorption studies, XRF and XRD. The BET surface area of the raw materials increased with increasing Ti/Si ratio up to 2.9 (461 m2/g) but further increase of Ti content beyond that ratio yielded compositeswith decreased surface area. The effect of aging evaluated in the samplewith Ti/Si=2.9 revealed that aging the composite for 2 h yields titania–silica powderwith the highest surface area (461 m2/g). The FTIR analysis displayed the presence of a vibration band at 945 cm−1, assignable to hetero linkage of the Si–O–Ti depicting the incorporation of TiO2 into SiO2 to form a composite.Moreover, photodegradation of methyl orange (MO) by the samples calcined at 800 °C showed that the TSC-5-800 (Ti/Si=5.6) exhibited the highest maximum photocatalytic activity of all the composites.en_US
dc.identifier.urihttp://hdl.handle.net/20.500.11810/2071
dc.language.isoenen_US
dc.publisherPowder Technologyen_US
dc.titleInfluence of titania content on the mesostructure of titania–silica composites and their photocatalytic activityen_US
dc.typeJournal Article, Peer Revieweden_US
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