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

Author:

Xu Jing1,Zhang Qiang1,Gao Xin1,Wang Peifang1,Che Huinan1,Tang Chunmei2,Ao Yanhui1ORCID

Affiliation:

1. Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes Ministry of Education, College of Environment Hohai University No.1, Xikang road Nanjing 210098 China

2. College of Science, Hohai University No.1, Xikang road Nanjing 210098 China

Abstract

AbstractPiezo‐catalytic self‐Fenton (PSF) system has been emerging as a promising technique for wastewater treatment, while the competing O2 reductive hydrogen peroxide (H2O2) production and FeIII reduction seriously limited the reaction kinetics. Here, we develop a two‐electron water oxidative H2O2 production (WOR−H2O2) coupled with FeIII reduction over a FeIII/BiOIO3 piezo‐catalyst for highly efficient PSF. It is found that the presence of FeIII can simultaneously initiate the WOR−H2O2 and reduction of FeIII to FeII, thereby enabling a rapid reaction kinetics towards subsequent Fenton reaction of H2O2/FeII. The FeIII 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 FeII‐PSF system. This study offers a new perspective for constructing efficient PSF systems and shatters the preconceived notion of FeIII in the Fenton reaction.

Publisher

Wiley

Subject

General Chemistry,Catalysis

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