<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Rasalingam, Shivatharsiny</style></author><author><style face="normal" font="default" size="100%">Kibombo, Harrison S.</style></author><author><style face="normal" font="default" size="100%">Wu, Chia-Ming</style></author><author><style face="normal" font="default" size="100%">Peng, Rui</style></author><author><style face="normal" font="default" size="100%">Baltrusaitis, Jonas</style></author><author><style face="normal" font="default" size="100%">Koodali, Ranjit T.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Competitive role of structural properties of titania-silica mixed oxides and a mechanistic study of the photocatalytic degradation of phenol.</style></title><secondary-title><style face="normal" font="default" size="100%">Applied Catalysis, B: Environmental</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">structure titania silica mixed oxide photocatalysis photocatalyst phenol</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2014</style></year></dates><publisher><style face="normal" font="default" size="100%">Elsevier B.V.</style></publisher><volume><style face="normal" font="default" size="100%">148-149</style></volume><pages><style face="normal" font="default" size="100%">394 - 405</style></pages><isbn><style face="normal" font="default" size="100%">0926-3373</style></isbn><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">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)]</style></abstract><notes><style face="normal" font="default" size="100%">CAPLUS AN 2014:264808(Journal; Online Computer File)</style></notes></record></records></xml>