Activity of the ZnO–Fe2O3 catalyst on the degradation of Dicamba and 2,4-D herbicides using simulated solar light

Development of photocatalytic coupled zinc–iron oxide nanoparticles via solution combustion for bisphenol-A removal

“…As a result, the band gap of coupled zinceiron oxide falls within the band gap of zinc oxide and iron (III) oxide. The results showed good agreement with the previous reports for coupled metal oxide where the band gap decreased with the increasing iron (III) oxide (Pradhan et al, 2011;Maya-Treviño et al, 2014).…”

“…AOPs can be characterized by the production of OH radicals due to the ability of these radicals to oxidize and mineralize most of the organic molecules by emitting carbon dioxide gas and inorganic ions (Zaw and Emett, 2002;Black and Veatch, 2010;Meshram et al, 2011;Oller et al, 2011;Pradhan et al, 2011;Tong et al, 2012;Maya-Treviño et al, 2014). Currently, a wide range of AOPs such as Fenton process, Fenton like process, ozonation and photocatalytic process have been well developed and applied in wastewater treatment.…”

α-Fe2O3 modified ZnO flower-like microstructures with enhanced photocatalytic performance for pentachlorophenol degradation

“…Fourth, because the conduction band position of ZnO is higher than that of α-Fe 2 O 3 and the ferric ions in α-Fe 2 O 3 are easily reduced to ferrous ions by accepting electrons, excited electrons in the conduction band of ZnO can rapidly transfer to the conduction band of α-Fe 2 O 3 after light activation [12]. This implies that α-Fe 2 O 3 can act as a sink for photo-induced electrons to increase the efficiency of electron-hole separation and suppress the recombination of electrons and holes.…”

“…It can be driven by visible light up to 600 nm due to the narrow band gap of 2.2 eV, and has been confirmed as an important member of visible-light-responsive semiconductor photocatalysts [9]. Although combinations of ZnO with Fe 2 O 3 have been investigated in order to enhance the photocatalytic activity of ZnO on organic compounds photodegradation, most of the used synthetic methods are complicated and need templates, high temperature, especial solvents and additives [10][11][12].…”

Industrial synthesis and characterization of nanophotocatalysts materials: titania

“…XRD may also be used to determine the structure in the crystalline state, including the size and the shape of the unit cell. In the case of nanophotocatalysts with several crystallographic phases [30], some reports have been using this technique to determine the composition of the different phases; the detection limit is around 1-3% [37][38][39].…”