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Deciphering co-catalytic mechanisms of potassium doped g-CN in Fenton process.

07:00 EST 5th March 2020 | BioPortfolio

Summary of "Deciphering co-catalytic mechanisms of potassium doped g-CN in Fenton process."

Conventional Fenton reaction for the pollutant removal is restricted by incomplete HO decomposition due to the low efficient Fe(III)/Fe(II) cycle. In this study, the co-catalytic Fenton processes with g-CN and the roles of potassium doping in the diverse mechanisms were comprehensively investigated. The degradation rate of enrofloxacin (ENR) in g-CN-3.9 %K/Fe(III)/HO was 204 times higher than that in conventional Fenton reaction. This significant enhancement was ascribed to the readily formed complex between Fe(III) and K doped g-CN The K doping facilitated the transfer of photoexcited e from g-CN-3.9 %K surface to Fe(III), leading to an accelerated Fe(III) reduction to Fe(II). In addition, this complex was coordinated and oxidized by HO, resulting in the formation of Fe(V) which quickly degraded ENR. Without K doping, on the other hand, only O dominated the degradation of ENR in g-CN/Fe(III)/HO due to the lack of Fe(III) complexation. This study provides a new perspective for regulating the transfer directions of the photoexcited e with K doping in g-CN/Fenton coupled catalytic system for water purification.

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Journal Details

This article was published in the following journal.

Name: Journal of hazardous materials
ISSN: 1873-3336
Pages: 122472

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