Highly Efficient Fe^III‐initiated Self‐cycled Fenton System in Piezo‐catalytic Process for Organic Pollutants Degradation

Abstract

Piezo-catalytic self-Fenton (PSF) system has been emerging as a promising technique for wastewater treatment, while the competing O 2 reductive hydrogen peroxide (H 2 O 2 ) production and Fe III reduction seriously limited the reaction kinetics. Here, we develop a twoelectron water oxidative H 2 O 2 production (WORÀ H 2 O 2 ) coupled with Fe III reduction over a Fe III /BiOIO 3 piezocatalyst for highly efficient PSF. It is found that the presence of Fe III can simultaneously initiate the WORÀ H 2 O 2 and reduction of Fe III to Fe II , thereby enabling a rapid reaction kinetics towards subsequent Fenton reaction of H 2 O 2 /Fe II . The Fe III initiating PSF system offers exceptional self-recyclable degradation of pollutants with a degradation rate constant for sulfamethoxazole (SMZ) over 3.5 times as that of the classic Fe II -PSF system. This study offers a new perspective for constructing efficient PSF systems and shatters the preconceived notion of Fe III in the Fenton reaction.

Unveiling the origin of the efficient photocatalytic degradation of nitazoxanide over bismuth (oxy)iodide crystalline phases

“…31 Very recently, an Fe III /BiOIO 3 piezo-catalytic self-Fenton system was developed, which can offer exceptional self-recyclable degradation of pollutants with a degradation rate constant for sulfamethoxazole over 3.5 times that of the classic Fe II -based system. 32…”

Reticular materials for wastewater treatment

“…Fenton and Fenton-like oxidation mainly use the reaction of H 2 O 2 and Fe 2+ to form ROSs to break down contaminants. 147…”

Construction of piezoelectric photocatalyst Au/BiVO4 for efficient degradation of tetracycline and studied at single-particle level

“…Xu et al reported that Au 4 /BaTiO 3 completely degraded methyl orange (MO) within 75 min under full spectrum light irradiation and assisted ultrasound excitation [36] . Li et al confirmed that the efficiency of photocatalytic hydrogen production and Rhodamine B (RhB) degradation on Au/AgNbO 3 under ultrasound vibration assistance were significantly increased [37] .…”