Nitrogen-containing TiO2 photocatalysts

Comparative study of (N, Fe) doped TiO2 photocatalysts

“…However, when nitrogen content is further increased (0.7%N), a lower k r value is obtained. It has been already reported that when nitrogen concentration increases, a deterioration of the photocatalytic activity is observed [39][40][41][42][43][44]. Considering that the oxygen vacancies and nitrogen act as electron and as holes trapping sites respectively [45], the recombination rate increases as consequence of the reduction of the distance between both in the sample.…”

Enhancement of Photocatalytic Activity of TiO2 by High-Energy Electron-Beam Treatment Under Atmospheric Pressure

“…The photocatalytic activity of TiO 2 can be enhanced by additional treatment, which can yield different surface electronic and geometric structures of TiO 2 . For example, the C, N and transition metal doping of TiO 2 can result in a significant enhancement of its photocatalytic activity, which is mostly related to the decrease in the band gap of TiO 2 caused by the dopants, resulting in an increase in the absorption of visible light [5][6][7][8][9][10][11]. Using Ag and Au nanoparticles, a plasmonic enhancement of the photocatalytic activity of TiO 2 can be obtained [12,13].…”

A simple route for the preparation of Eu, N-codoped TiO2 nanoparticles with enhanced visible light-induced photocatalytic activity

“…It is demonstrated that Eu, Ncodoped titania can greatly improve the absorption of visible light. The reason may due to the increase in crystallinity [31], or it may be attributed to the appearance of a new electronic state in the middle of the TiO 2 band gap, the distance of charge transfer between f electrons of the rare earth ions (or the N dopant), and the conduction (CB) or valence band (VB) of TiO 2 is narrowed, allowing visible light absorption [32,33]. As known, the VB and CB of TiO 2 are mainly formed due to the major contribution by completely filled oxygen 2p orbital and the empty Ti 3d orbital.…”