A type II heterojunction α-Fe₂O₃/g-C₃N₄ for the heterogeneous photo-Fenton degradation of phenol

Abstract

Composite α-Fe2O3/g-C3N4 with type II heterojunction to degrade phenol by heterogeneous photo-Fenton reaction.

A Mesoporous CuO/CuSe Heterojunction Nanocomposite with Applications in Visible‐Light Photocatalysis and as an Electrochemical Phenol Sensor

“…The oxidation of phenol occurs resulting the generation of phenoxy radical (C 6 H 5 O⋅) under the applied potential [67] . Numerous phenol molecules become diffused into the surface of the heterojunction structure which provided ample active sites [68–69] . Hence, the phenol oxidation rate is more feasible in case of CuO/CuSe/GCE system.…”

“…[67] Numerous phenol molecules become diffused into the surface of the heterojunction structure which provided ample active sites. [68][69] Hence, the phenol oxidation rate is more feasible in case of CuO/CuSe/GCE system. Moreover, the strong electronic interaction at the interface site as well as the ample amount of active site promote the oxidation of phenol significantly.…”

Accelerating Fe(iii)/Fe(ii) redox cycling by Zn0 in micro-nano dendritic Fe–Zn alloy for enhanced Fenton-like degradation of phenol

“…First, RFe(0) on the surface is oxidized by H 2 O 2 or O 2 to produce RFe(II) (eqn (3) and ( 4)), 46 and then OH is generated through the reaction of RFe(II) and H 2 O 2 (eqn ( 5)). Ultimately, OH attacks phenol molecules and degrades them into intermediates and small molecules through eqn (6). RFe(II) can be regenerated by the redox reaction between RFe(III) and H 2 O 2 (eqn ( 7)) and the disproportionation reaction between RFe(III) and RFe(0) (eqn ( 8)).…”

“…Among them, the Fenton reaction has attracted much attention in environmental protection and pollution control due to its simplicity, easy operation and mild working conditions. With further progress, Fenton technology combined with light, [5][6][7] electricity, 8-10 ultrasound [11][12][13] and microwaves [14][15][16] has been developed to further improve the degradation performance. However, the above-mentioned auxiliary Fenton technology requires field assistance, resulting in complex operation and increased cost, finally hindering its wide application.…”

Advances in photo-assisted seawater splitting promoted by green iron oxide-carbon nitride photoelectrocatalysts

“…Thanks also to the intimate Fe 2 O 3 /gCN contact, as revealed by SIMS and TEM data (see above), 45 electrons from the more negative gCN conduction band are transferred to the less negative Fe 2 O 3 one, whereas holes ow from the Fe 2 O 3 valence band to the gCN one, thus yielding enhanced electron-hole separation. 43,46,57,84 Subsequently, under the action of the applied bias voltage, electrons in the Fe 2 O 3 conduction band are This journal is © The Royal Society of Chemistry 2023 injected in the external circuit through the FTO substrate 34 and are transported towards the cathode, while holes are progressively accumulated at gCN sites, where water is directly oxidized to O 2 . Consequently, electrons and holes participate in hydrogen evolution reaction (HER) and OER, respectively.…”