Synthesis and characterization of binary titania-silica mixed oxides
by Budhi, Sridhar, M.S., UNIVERSITY OF SOUTH DAKOTA, 2010, 57 pages; 1482791

Abstract:

A series of binary titania-silica mixed oxides were synthesized by the sol-gel method at room temperature. The mixed oxides were prepared that involved the hydrolysis of titanium isopropoxide and tetraethylorthosilicate (TEOS) by co-solvent induced gelation usually in acidic media. The resulting gels were dried, calcined and then characterized by powder X-ray diffractometric studies, nitrogen sorption studies (at 77K), diffuse reflectance spectroscopy, Raman microscopy and transmission electron microscopic studies. The nitrogen sorption studies indicate that the specific surface areas, pore volume, pore diameter and pore size distribution of the mixed oxides were substantially enhanced when non-polar solvents such as toluene, p-xylene or mesitylene were added as co-solvents to the synthesis gel. Transmission electron microscopic (TEM) studies confirm the results obtained from the nitrogen sorption studies. Our results indicate that we can obtain binary metal oxides possessing high surface area and large pore volumes with tunable pore size distribution at room temperature. Photocatalytic evaluation of the mixed oxides is currently in progress.

 
AdviserRanjit Koodali
SchoolUNIVERSITY OF SOUTH DAKOTA
SourceMAI/ 49-02, p. , Dec 2010
Source TypeThesis
SubjectsInorganic chemistry; Physical chemistry; Nanoscience
Publication Number1482791
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