Two step synthesis of a mesoporous titania–silica composite from titanium oxychloride and sodium silicate

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dc.contributor.authorShao, Godlisten N.
dc.contributor.authorElineema, Gideon
dc.contributor.authorQuang, Dang Viet
dc.contributor.authorKim, You Na
dc.contributor.authorShim, YoungHo
dc.contributor.authorHilonga, Askwar
dc.contributor.authorKim, Jong-gil
dc.contributor.authorKim, Hee Taik
dc.date.accessioned2016-05-16T12:14:31Z
dc.date.available2016-05-16T12:14:31Z
dc.date.issued2011-11-15
dc.descriptionFull text can be accessed at the following link http://www.sciencedirect.com/science/article/pii/S0032591011006280
dc.description.abstractMesoporous titania–silica composite (MTSC) with a large surface area (387 m2/g) and large pore volume was synthesized by a two step condensation sol–gel method. Transparent TiO2 sol was formed at room temperature through condensation and peptization of titanium oxychloride solution using ammonium hydroxide and aqueous nitric acid respectively. Sodium silicate was used as a silica source to form a composite with the preformed TiO2 sol. The physical properties of the composite were examined by Fourier Transform infrared (FTIR), BET surface area, thermogravimetric analysis (TGA), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray diffraction (XRD). The nitrogen physisorption behavior of the synthesized composite was compared to that obtained from grafting and one-pot co-condensation methods using the same precursors in the presence of cetyltrimethylammonium bromide (CTAB). It was found that MTSC synthesized under this method possessed large pore sizes and pore volume but its thermal stability was comparatively low. FTIR spectra showed the formation of a Ti\O\Si bond at 940 cm−1 suggesting that titania was incorporated in silica to form a composite. The XRD patterns showed that the major phase of the titania had an anatase phase up to 900 °C but it transforms into rutile when calcined at 1000 °C. Furthermore the EDS studies of the as-synthesized and calcined samples substantiated the formation of titania–silica composites.en_US
dc.identifier.urihttp://hdl.handle.net/20.500.11810/2067
dc.language.isoenen_US
dc.publisherPowder Technologyen_US
dc.titleTwo step synthesis of a mesoporous titania–silica composite from titanium oxychloride and sodium silicateen_US
dc.typeJournal Article, Peer Revieweden_US
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