@article {79,
	title = {Competitive role of structural properties of titania-silica mixed oxides and a mechanistic study of the photocatalytic degradation of phenol.},
	journal = {Applied Catalysis, B: Environmental},
	volume = {148-149},
	year = {2014},
	note = {CAPLUS AN 2014:264808(Journal; Online Computer File)},
	pages = {394 - 405},
	publisher = {Elsevier B.V.},
	abstract = {TiO2-SiO2 mixed oxide materials were hydrothermally synthesized and the photocatalytic degrdn. of phenol under UV-irradn. was evaluated.  We also demonstrated that varying the co-solvent, modulates the structural properties of the materials.  In particular, the use of non-polar co-solvents such as toluene seemed to increase the crystallinity, surface area, and pore diam. while the crystallite size of titania seemed to change little.  A comprehensive characterization using surface and bulk techniques evidenced the role of porosities, crystallinity, and Ti-O-Si linkages of the mixed oxides as significant factors that contribute to the degrdn. of phenol.  The TiO2-SiO2 mixed oxide material prepd. using only ethanol as the solvent showed 24\% degrdn. of phenol after 120 min of irradn. whereas other mixed oxide materials degraded phenol more efficiently (57\% to 100\%) in the same duration of time.  The higher photocatalytic activities of the mixed oxide materials prepd. using non-polar solvents is attributed to a combination of factors that include higher Apparent Surface Coverages of Ti-O-Si heterolinkages, larger pore sizes, and most importantly higher crystallinities of the titania phase.  Larger pore sizes enabled better transport of reactant mols. and products to and from the active sites (Ti-O-Si heterolinkages) and the higher crystallinities of the titania phase helped in minimizing the electron-hole recombination in these photocatalysts, and thus resulted in high degrdn. efficiencies. [on SciFinder(R)]},
	keywords = {structure titania silica mixed oxide photocatalysis photocatalyst phenol},
	isbn = {0926-3373},
	author = {Rasalingam, Shivatharsiny and Kibombo, Harrison S. and Wu, Chia-Ming and Peng, Rui and Baltrusaitis, Jonas and Koodali, Ranjit T.}
}
