Crystallinity and valence states of manganese oxides in Fenton-like polymerization of phenolic pollutants for carbon recycling against degradation

Yang, Yangyang; Zhang, Panpan; Hu, Kunsheng; Zhou, Peng; Wang, Yuxian; Asif, Abdul Hannan; Duan, Xiaoguang; Sun, Hongqi; Wang, Shaobin

doi:10.1016/j.apcatb.2022.121593

Cited by 78 publications

(23 citation statements)

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“…With the increase of pollutants, the peak strength of phenoxy radical also increased, indicating that the yield of phenoxy radical also increased. This may be due to the presence of 1 O 2 in the solution and the presence of the hydroxyl group on BPA, so the electrons of the hydroxyl group are transferred to 1 O 2 , resulting in the generation of a phenoxy radical …”

Section: Resultsmentioning

confidence: 99%

“…This may be due to the presence of 1 O 2 in the solution and the presence of the hydroxyl group on BPA, so the electrons of the hydroxyl group are transferred to 1 O 2 , resulting in the generation of a phenoxy radical. 51 KSCN is often used as a complexing agent for transition metal ions. When different concentrations of KSCN were added to the FeOCl/BPA/PS system, the removal rate of BPA was significantly reduced (Figure S21, Table S16).…”

Section: •−mentioning

confidence: 99%

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Regulating Interlayer Confinement FeOCl for Accelerating Polymerization of Pollutants to Reduce Carbon Emission in Water Purification

Ding

Zuo

et al. 2023

ACS Appl. Mater. Interfaces

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The spatial structure regulation of catalysts could optimize the reaction pathway and enhance the mass transfer kinetics, which might realize the efficient and low-consumption removal of pollutants in Fenton-like technology. In this study, N,Ndimethylformamide (DMF) intercalation was used to adjust the interlayer spacing of FeOCl from 7.90 to 11.84 Å by a simple and rapid intercalation method, thereby enhancing the mass transfer kinetics and altering the catalytic pathway. The removal rate of BPA in the DMF-FeOCl/PS system increased by 8.78 times, showing good resistance to complex water environments (such as pH, humic acid, and anions), especially in 5 g/L high-salt wastewater. The direct electron transfer processes between Fe(IV) and pollutants mediated by interlayer Fe sites generate phenoxy radicals, and the polymerization processes occur, achieving efficient removal of pollutants and low CO 2 emissions. This study provides new insight into the efficient and low-carbon treatment of high-salt wastewater.

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Section: Resultsmentioning

confidence: 99%

Section: •−mentioning

confidence: 99%

Regulating Interlayer Confinement FeOCl for Accelerating Polymerization of Pollutants to Reduce Carbon Emission in Water Purification

Ding

Zuo

et al. 2023

ACS Appl. Mater. Interfaces

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“…To investigate in depth the possible existence of a non-radical mechanism for EE2 oxidation, additional electrochemical voltammetry experiments were carried out in the absence of radiation and under galvanostatic current, corresponding to the open circuit potential (OCP = 0.135 V vs. Ag/AgCl) and the results are shown in Fig. 4(c) [29]. In the first phase, 10 mg L − 1 PMS were added to the reactor, leading to a potential increment to 0.23 V vs. Ag/AgCl; this indicates that the oxidant acts as an electron acceptor hindering the uninterrupted charge flow through the external circuit and, consequently, resulting in the electric force rise to keep the current constant.…”

Section: Radical and Non-radical Mechanismsmentioning

confidence: 99%

Peroxymonosulfate enhanced photoelectrocatalytic degradation of 17α-ethinyl estradiol

et al. 2023

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“…Surface Mn 2+ and Mn 3+ tend to combine with oxidants to form confined complexes to initiate the nonradical electron-transfer pathway (ETP). But higher-valence Mn 4+ would directly attack pollutants and spontaneously be reduced to Mn 2+ and Mn 3+ to restart the ETP . Inspired by the aforementioned work, it is necessary to regulate the electronic structure of the catalyst itself and reveal the relevant catalysis mechanism, which is an important strategy for designing efficient catalysts for practical applications.…”

Section: Introductionmentioning

confidence: 99%

Chalcogen Elements in Regulating the Local Electron Density of Cu₂X for an Efficient Heterogeneous Fenton-like Process

Dai

Sheng

Xia

et al. 2023

ACS Appl. Mater. Interfaces

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In this work, a novel strategy for Fenton activity improvement of Cu 2 X was reported, in which the local electron density of Cu sites was regulated via manipulation of simple chalcogen elements (O, S, and Se). Among them, Cu 2 Se catalysts show excellent catalytic activity to activate H 2 O 2 for the complete removal of ofloxacin (10 mg/L) at an initial pH of 6.5 within 120 min. Radical scavenger experiments and electron spin resonance spectroscopy confirm that • OH radicals are the primary oxygen reactive species to drive ofloxacin degradation. In addition, density functional theory calculations further proved that electrons would migrate from X and accumulate on Cu active sites in the order Se > S > O. Compared with Cu 2 O and Cu 2 S, the highly concentrated electron density of Cu atoms in Cu 2 Se not only decreased the activation energy of the Fenton-like reaction but also boosted the Cu 2+ /Cu + cycle with the generation of more • OH radicals (18−66 μm) and the maintenance of high stability of catalysts, leading to excellent catalytic activity and application potential. We believe this work will lay the foundation for designing excellent Fenton catalysts for practical applications since developing a heterogeneous Fenton system with the highest oxidation efficiency has always been the long-term goal in this field.

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Crystallinity and valence states of manganese oxides in Fenton-like polymerization of phenolic pollutants for carbon recycling against degradation

Cited by 78 publications

References 50 publications

Regulating Interlayer Confinement FeOCl for Accelerating Polymerization of Pollutants to Reduce Carbon Emission in Water Purification

Regulating Interlayer Confinement FeOCl for Accelerating Polymerization of Pollutants to Reduce Carbon Emission in Water Purification

Peroxymonosulfate enhanced photoelectrocatalytic degradation of 17α-ethinyl estradiol

Chalcogen Elements in Regulating the Local Electron Density of Cu₂X for an Efficient Heterogeneous Fenton-like Process

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Crystallinity and valence states of manganese oxides in Fenton-like polymerization of phenolic pollutants for carbon recycling against degradation

Cited by 78 publications

References 50 publications

Regulating Interlayer Confinement FeOCl for Accelerating Polymerization of Pollutants to Reduce Carbon Emission in Water Purification

Regulating Interlayer Confinement FeOCl for Accelerating Polymerization of Pollutants to Reduce Carbon Emission in Water Purification

Peroxymonosulfate enhanced photoelectrocatalytic degradation of 17α-ethinyl estradiol

Chalcogen Elements in Regulating the Local Electron Density of Cu2X for an Efficient Heterogeneous Fenton-like Process

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Chalcogen Elements in Regulating the Local Electron Density of Cu₂X for an Efficient Heterogeneous Fenton-like Process