NDLI: Mesoporous titania–silica composite from sodium silicate and titanium oxychloride. Part II: one-pot co-condensation method

Content Provider	Springer Nature Link
Author	Hilonga, Askwar Kim, Jong Kil Sarawade, Pradip B. Kim, Hee Taik
Copyright Year	2009
Abstract	Mesoporous titania–silica composite with large primary particles and homogeneous dispersion of Ti in the silica matrix were synthesized by the sol–gel method via a one-pot co-condensation method using cetyltrimethylammonium bromide (CTAB) as a structure-directing agent. Freshly prepared titanium oxychloride (TiOCl$_{2}$, titania precursor that is relatively stable) and sodium silicate were used as titania and silica precursors (at the initial ratio of Ti:Si = 1), respectively. The final products were obtained after removing the template by calcination and had overall ratio of Ti:Si = 2:3 (based on EDS and XRF analyses). Other characterization techniques employed include FE-SEM, TEM, FT-IR, DTGA, and nitrogen physisorption studies. The textural properties of the products were highly influenced by the molar concentration of CTAB. Materials with large primary particles (submicrometer-scale dimensions) were obtained at higher concentrations of CTAB (1.7 wt%). The porosities of the templated material were highly reduced compared to that of the untemplated material, emphasizing the influence of Ti loading in the silica matrix. Both pore size and surface area increased at a calcination temperature of 550 °C. The DTGA result showed that the composites exhibited elevated thermal stability (up to 900 °C). In summary, mesoporous titania–silica composite with desirable properties were developed via the proposed method using a relatively inexpensive silica precursor.
Starting Page	1264
Ending Page	1271
Page Count	8
File Format	PDF
ISSN	00222461
Journal	Journal of Materials Science
Volume Number	45
Issue Number	5
e-ISSN	15734803
Language	English
Publisher	Springer US
Publisher Date	2009-12-05
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Mechanics Crystallography Continuum Mechanics and Mechanics of Materials Polymer Sciences Characterization and Evaluation of Materials Materials Science
Content Type	Text
Resource Type	Article
Subject	Ceramics and Composites Mechanics of Materials Mechanical Engineering Polymers and Plastics

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