Publication: New method to synthesize mesoporous titania by photodegradation of surfactant template
Date
2016
Authors
Zi S.C.
Chandren S.
Yuan L.S.
Razali R.
Ho C.S.
Hartanto D.
Indra Mahlia T.M.
Nur H.
Journal Title
Journal ISSN
Volume Title
Publisher
Elsevier Masson SAS
Abstract
Mesoporous titania has been successfully synthesized by photodegradation removal of cetyltrimethylammonium bromide as the surfactant, after slow hydrolyzation of titanium(IV) isopropoxide. Fourier transform infrared spectra proved that photodegradation has successfully decreased the peak areas of the alkyl groups from the template. The nitrogen adsorption analysis showed that the pore size and the specific surface area of the mesoporous titania were 3.7 nm and 203 m2 g-1, respectively, proving the mesoporosity of the titania obtained with the existence of the interparticle mesoporosity which was confirmed by transmission electron microscopy. Based on X-ray diffraction results, the mesoporous titania obtained was in the form of crystalline anatase phase. Furthermore, results from the diffuse reflectance ultra violet-visible spectra showed that the composition of tetrahedral titanium(IV) was more than the octahedral titanium(IV). When the mesoporous titania obtained was used as a catalyst in the oxidation of styrene, an improvement in the conversion of styrene (38%) was observed when compared to those obtained using Degussa P25 TiO2 (14%) as the catalyst. � 2015 Elsevier Masson SAS.
Description
Catalysts; Gas adsorption; High resolution transmission electron microscopy; Mesoporous materials; Photodegradation; Pore size; Styrene; Surface active agents; Titanium; Transmission electron microscopy; X ray diffraction; Cetyl trimethyl ammonium bromides; Diffuse reflectance; Fourier transform infrared spectra; Mesoporous titania; Nitrogen adsorption; Oxidation of styrene; Surfactant template; Ultra violet-visible; Titanium dioxide