Notes on the photo-induced characteristics of transition metal-doped and undoped titanium dioxide thin films

TiO2 Nanotubes on Transparent Substrates: Control of Film Microstructure and Photoelectrochemical Water Splitting Performance

“…Nanocrystalline TiO 2 has highly promising optical, photocatalytic and photoelectrochemical (PEC) performance [4], which have been extensively used for a broad range of applications including environmental purification, organic oxidations [5], solar cells, PEC water splitting, and hydrogen peroxide production [1,2,4,[6][7][8][9][10][11][12].…”

Influence of physicochemical–electronic properties of transition metal ion doped polycrystalline titania on the photocatalytic degradation of Indigo Carmine and 4-nitrophenol under UV/solar light

“…However, the high degree of recombination between photogenerated charge carriers in TiO 2 and also its large band gap limits its overall photocatalytic efficiency. An intense research has been devoted in recent years to lower the threshold excitation energy in order to utilize large fraction of solar light with high efficiency by several methods which mainly includes metal ion doping [14][15][16][17][18][19][20][21][22][23][24][25], non metal ion doping [26][27][28][29][30][31][32][33][34][35], surface sensitization of TiO 2 by dyes [36][37][38] and metal complexes [39,40], coupling with narrow band gap semiconductor [41,42] and depositing noble metal on the TiO 2 surface [43,44].…”

“…The transition metal ion doping in the titania matrix, changes the local electronic structure and induces the visible light absorption usually by introducing localized electronic states within the band gap and it also creates different surface structure that can intrinsically alter the surface transfer of charge carriers and hence the photocatalytic activity [14][15][16][17][18][19][20][21][22][23][24][25]. Despite the intensified research on metal ion doped TiO 2 , no unifying decision has been made so far, since wide variety of experimental conditions applied for photocatalyst preparation and different substrates chosen to study their activity.…”

Advanced Oxidation Processes in Food Industry Wastewater Treatment – A Review

“…Degussa P-25 TiO 2 catalyst is probably the most active catalyst in photocatalytic reactions however its optimum effective will always be strongly dependent on the type and concentration of the treated pollutant (Gogate & Pandit, 2004a). In several studies, the doping of TiO 2 with metals, such as, platinum (Hufschmidt et al, 2002), silver, zirconium and iron (Kment et al, 2010) as well as, sulphur, carbon and nitrogen (Menendez-Flores et al, 2011;Wang et al, 2011) has been proven to enhance the activity of the catalyst. …”