Journal ArticleDOI
Activation of Peroxymonosulfate by Benzoquinone: A Novel Nonradical Oxidation Process
TLDR
Findings have important implications for the development of novel nonradical oxidation processes based on PMS, because 1O2 as a moderately reactive electrophile may suffer less interference from background organic matters compared with nonselective •OH and SO4•-.Abstract:
The reactions between peroxymonosulfate (PMS) and quinones were investigated for the first time in this work, where benzoquinone (BQ) was selected as a model quinone. It was demonstrated that BQ could efficiently activate PMS for the degradation of sulfamethoxazole (SMX; a frequently detected antibiotic in the environments), and the degradation rate increased with solution pH from 7 to 10. Interestingly, quenching studies suggested that neither hydroxyl radical (•OH) nor sulfate radical (SO4•–) was produced therein. Instead, the generation of singlet oxygen (1O2) was proved by using two chemical probes (i.e., 2,2,6,6-tetramethyl-4-piperidinol and 9,10-diphenylanthracene) with the appearance of 1O2 indicative products detected by electron paramagnetic resonance spectrometry and liquid chromatography mass spectrometry, respectively. A catalytic mechanism was proposed involving the formation of a dioxirane intermediate between PMS and BQ and the subsequent decomposition of this intermediate into 1O2. Accordi...read more
Citations
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Journal ArticleDOI
Axial N Ligand‐Modulated Ultrahigh Activity and Selectivity Hyperoxide Activation over Single‐Atoms Nanozymes
TL;DR: In this article , the axial N coordination in the nano-enzymes has been investigated to guide the design and development of nanozymes nearly to the bio-enzyme with excellent activity and selectivity.
Journal ArticleDOI
Constant oxidation of atrazine in Fe(III)/PDS system by enhancing Fe(III)/Fe(II) cycle with quinones: Reaction mechanism, degradation pathway and DFT calculation.
TL;DR: In this paper , methyl p-benzoquinone (MBQ) was introduced into Fe(III)/peroxydisulfate system (Fe(III/PDS) to expedite the conversion of Fe (III) to Fe(II) and the degradation of atrazine (ATZ), ultimately establishing an environmentally friendly system of treating pollution with pollution.
Journal ArticleDOI
Donor-acceptor engineered g-C3N4 enabling peroxymonosulfate photocatalytic conversion to 1O2 with nearly 100% selectivity.
TL;DR: In this article , a donor-acceptor structured g-C3N4 by covalently engineering benzenetricarboxaldehyde (BTA) onto the fringe of g-c3n4-BTA exerts high efficiency 1O2 generation with nearly 100% selectivity via peroxymonosulfate (PMS) photocatalytic activation upon visible light illumination, exhibiting obviously boosted efficiency for selective elimination of atrazine (ATZ).
Journal ArticleDOI
Identification of step-by-step oxidation process and its driving mechanism in the peroxymonosulfate catalytically activated with redox metal oxides
TL;DR: In this paper , a step-by-step oxidation process based on the in-depth analysis of the catalytic mechanism of peroxymonosulfate (PMS) activated by the common MnO2-based catalyst-manganese octahedral molecular sieve (OMS-2) was proposed.
Journal ArticleDOI
Rapidly Degrading Tetracycline by Highly Selective Catalysis with Hydroxyapatite Nanowire
TL;DR: In this paper , a novel synthesized biocompatible material without any transition metals, was applied to catalytic degradation of antibiotics, and the removal reached 85% within 5 min at room temperature.
References
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Journal Article
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Journal ArticleDOI
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TL;DR: The advantage of Co/PMS compared to the traditional Fenton Reagent is attributed primarily to the oxidizing strength of the radicals formed, since sulfate radicals are stronger oxidants than hydroxyl and the thermodynamics of the transition-metal-oxidant coupling.
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