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

Simple item page
dc.creatorShao, Godlisten N.
dc.creatorHilonga, Askwar
dc.creatorJeon, Sun Jeong
dc.creatorLee, Jae Eun
dc.creatorElineema, Gideon
dc.creatorQuang, Dang Viet
dc.creatorKim, Jong-Kil
dc.creatorKim, Hee Taik
dc.date2016-05-16T12:51:14Z
dc.date2016-05-16T12:51:14Z
dc.date2012-08-28
dc.date.accessioned2018-04-18T12:07:59Z
dc.date.available2018-04-18T12:07:59Z
dc.descriptionTitania–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.
dc.identifierhttp://hdl.handle.net/20.500.11810/2071
dc.identifier.urihttp://hdl.handle.net/20.500.11810/2071
dc.languageen
dc.publisherPowder Technology
dc.titleInfluence of titania content on the mesostructure of titania–silica composites and their photocatalytic activity
dc.typeJournal Article, Peer Reviewed

Files

Collections

Department of Chemistry and Life Sciences