Marked enhancement of photocatalytic activity and photochemical stability of N–doped TiO2 nanocrystals by Fe3+/Fe2+ surface modification

Enhanced Visible Light Photocatalytic Activity ofV2O5Cluster Modified N-DopedTiO2for Degradation of Toluene in Air

“…It can be seen that Ti2p peak at 458.85 eV of N-TiO 2 /V 2 O 5 -0.5% sample shifted positively by 0.25 eV in comparison with that of the Ti2p peak in N-TiO 2 sample (458.60 eV). The shifting of E b can be ascribed to the interaction between host N-TiO 2 and guest V 2 O 5 clusters, as also confirmed by Raman spectra [20]. Figure 4(d) shows the E b for V2p 3/2 for both samples.…”

“…Visible light driven photocatalysis is one of the hottest topics worldwide [9][10][11][12][13][14][15][16][17][18][19][20][21][22]. Pioneered by Asahi et al who reported that nitrogen doping can extend the optical absorption of TiO 2 into visible region and enhance the photocatalytic activity under visible light irradiation [9], many efforts have been devoted afterwards to developing nonmetal doped TiO 2 exhibiting enhanced visible light activities [10][11][12][13][14].…”

“…Among the various types of nonmetal doped TiO 2 , Ndoped TiO 2 is the most typical and has been intensively investigated for solar energy conversion and pollutants degradation [15][16][17][18]. However, nitrogen doping intrinsically favored the formation of defects that act as recombination center, which largely limited the photoactivity of N-doped TiO 2 under visible light illumination [19][20][21][22].…”

Correlation investigation on the visible-light-driven photocatalytic activity and coordination structure of rutile Sn-Fe-TiO2 nanocrystallites for methylene blue degradation

“…The peak located at around 529.7 eV corresponds to oxygen in TiO 2 lattice (O L ); the other one around 531.4 eV was assigned to oxygen in surface hydroxyl groups (O OH ) [37]. The fitting results listed in Table 2 clearly show that the amount of O OH was increased and the O/Ti mole ratio were decreased with tin and iron doping due to the formation of oxygen vacancies after doping [43,44]. This is in accordance with the Raman results.…”

The abatement of major pollutants in air and water by environmental catalysis

“…These techniques include surface modification via organic materials and semiconductor coupling, band gap modification by creating oxygen vacancies, and by doping with nonmetals or co-doping with nonmetals and metals [175]. VOCs and bacteria can be photodegraded under visible light irradiation on Fe-TiO 2 [176], N-TiO 2 [177], C-TiO 2 [178,179], Cu x O/TiO 2 [180], TiO 2 hybridized with graphite-like carbon [181] and so on. Air-cleaning devices based on photocatalysts require an additional light source.…”