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A surface science perspective on TiO2 photocatalysis

“…The most commonly ascribed effect of Pt (or most other supported noble metal on TiO 2 ) is its ability to promote charge carrier separation (e.g. via formation a Schottky barrier at the metal-TiO 2 interface) with electrons being accumulating on the metal and holes remaining on TiO 2 [33,51,161,533,551,562,975,1186,1189,1192,1193,1195,1198,1199,1209,1210,1221,1222,[1225][1226][1227]1230]. Enhancement from supported Pt particles has also been attributed to the shifting of band edges that makes certain electron transfer processes more favorable in the vicinity of the supported metal particle [1198,1216,1220].…”

Preparation and characterization of hydrophobic TiO2 pillared clay: The effect of acid hydrolysis catalyst and doped Pt amount on photocatalytic activity

“…It could be due to a few reasons: (a) the low concentration of Pt ions [15]; (b) XPS used for the measurement is not sensitive enough; (c) the penetration of Pt element into the skeleton of TiO 2 . To verify the actual existence of Pt, the energy dispersive X-ray spectrometer experiment was carried out and the result is seen in 5.…”

Electrospun tungsten trioxide nanofibers decorated with palladium oxide nanoparticles exhibiting enhanced photocatalytic activity

“…10,52 Particularly, PdO particle is known to have an ability to capture electrons during photocatalytic process and as a result, recombination of electron-hole pair can be minimized. 53 When WO 3 absorbs the light having energy equal to or greater than the band gap of the material, electron-hole pairs are generated in WO 3 . Then the photogenerated hole/electron pairs migrate to the surface of the Pd, allowing reaction with adsorbed chemical species.…”