Graphene-Based Photo-Fenton Catalysts for Pollutant Control

Abstract

Water pollution is a global environmental issue with multi-dimensional influences on human life. Some strategies, such as photo-Fenton reaction, have been employed to remove recalcitrant pollutants. Two-dimensional (2D) graphene and its three-dimensional (3D) configurations have attracted considerable attention as emerging carbon-based catalysts in photo-Fenton fields owing to their alluring properties in electron transfer, reactant adsorption, and light response. This review summarizes the recent developments in 2D and 3D graphene-based catalysts for photo-Fenton reactions. Their structures, characteristics, activity, and mechanisms are discussed. The conclusions and outlooks are proposed for the profound understanding of challenges and future directions.

Porous defective carbon ferrite for adsorption and photocatalysis toward nitrogen compounds in pre-treated biogas slurry

“…4 ) displays two characteristic peaks at 1100 and approximately 3400 cm −1 corresponding to the stretching mode of the OH groups. The bands at 1720 and 1730 cm −1 on the carbon surface demonstrate the vibrations of COOH groups, which assuredly means carbon ferrite has obtained oxygen-containing functional groups as fern leaves contain bioactive and optically active carboxyl-containing alkalis 31 . The Raman spectra showed the microstructure of fern-leaf carbon prepared by molten alkali method in Fig.…”

“…Three absorption bands in the diffuse reflectance of the nanocomposites can be observed. The first two are observed at 465 and 530 nm, corresponding to the absorption of Fe 2 O 3 , and the third one at 710 nm is attributed to the absorption of Fe 3 O 4 and the formation of Fe–O–C bonds between ferrite and carbon enhanced light absorption of the carbon ferrite nanocomposites 26 , 31 . The analysis of light absorption of the carbon ferrite sample is consistent with the XRD characterization result, with three types of iron oxide crystals corresponding to three optical absorption bands, showing the potential in optical application.…”

Functionalized hybrid magnetic catalytic systems on micro- and nanoscale utilized in organic synthesis and degradation of dyes

“… 149,150 These magnetic catalysts participate in both adsorptive and degradation reactions. 151 GNSFs show incomparably better adsorption efficiency than individual graphene-based nanomaterials, i.e. , graphene, GO, and rGO.…”

“…149,150 These magnetic catalysts participate in both adsorptive and degradation reactions. 151 GNSFs show incomparably better adsorption efficiency than individual graphenebased nanomaterials, i.e., graphene, GO, and rGO. As a prominent example, rGO/Bi 2 Fe 4 O 9 displayed a maximum adsorption capacity (q m ) of 3.95 mg g À1 for bisphenol-A, which is signicantly higher than that of Bi 2 Fe 4 O 9 (0.74 mg g À1 ) and GO/ Bi 2 Fe 4 O 9 (1.72 mg g À1 ).…”

Green Synthesis of Reduced Graphene Oxide-Supported Palladium Nanoparticles by Coleus amboinicus and Its Enhanced Catalytic Efficiency and Antibacterial Activity

“…Graphene is a 2D hexagonal single layer of graphite, which acts as a catalyst with high thermal and electrical conductivities [1][2][3]. Graphene and its derivatives, such as graphene oxide and reduced graphene oxide, can also act as catalysts, which support and stabilize metal nanoparticles [4,5].…”