Fe-modified TiO2 photocatalysts for the oxidative degradation of recalcitrant water contaminants

Insight into the Effects of Fe Addition on the Local Structure and Electronic Properties of SrTiO3

“…This behavior may be associated with replacement of Ti 4+ by iron ions in the STO network, inducing the formation of a new dopant energy level below the conduction band. 54,56,57 Menesklou et al reported that the addition of Fe contributes to a broadening of the valence band of STO, which extends closer to the conduction band edge, and consequently reduces the band gap energy. 36 3.3.…”

Sol–gel iron-doped TiO2 nanopowders with photocatalytic activity

“…Iron adsorbed on the surface of TiO 2 can be an electron or hole scavenger and results in the improvement of the separation of free carriers [25,26]. Previous studies regarding sol-gel Fe/TiO 2 catalysts for oxidative degradation of recalcitrant water contaminants [27], degradation of Orange II azo dye solutions [28], decomposition of phenol, nitrophenol and 2,4,6-trichlorophenol [29][30][31] from aqueous solutions, oxidation of p-xylene in gas phase [32] and application in hydrogen evolution by water splitting under visible light irradiation [33,34] should be mentioned. In a recent review we have presented an exhaustive study of the last literature data about sol-gel Fe-doped TiO 2 nanopowders from point of view of synthesis conditions and some of their properties [35].…”

Direct microwave–hydrothermal synthesis of Fe-doped titania with extended visible-light response and enhanced H2-production performance

“…However, these methods are time consuming because they often require a multi-stage process [22,23]. Moreover, Castro-López et al [26] found that the sol-gel process increases the number of Fe atoms that serve as recombination centers for photo-induced electrons and holes, thereby reducing photoactivity. Our previous study [27] on Fe-doped TiO 2 prepared by a two-step hydrothermal method also demonstrated that when the Fe doping concentration exceeded 0.01%, the recombination rate was enhanced and the temporary photo-induced electrons observed in hole-trapping sites disappeared, resulting in a decrease in photoactivity.…”