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
Dealloyed nanoporous copper as a highly active catalyst in Fenton-like reaction for degradation of organic pollutants
TL;DR: In this paper , the dealloyed nanoporous copper catalysts exhibited superior catalytic performances in peroxymonosulfate (PMS) activation towards the degradation of bisphenol A (BPA), providing new insight in developing highly active catalysts for wastewater purification.
Journal ArticleDOI
Benzoquinone-assisted heterogeneous activation of PMS on Fe3S4 via formation of active complexes to mediate electron transfer towards enhanced bisphenol A degradation.
TL;DR: The role of BQ in the heterogeneous activation of peroxymonosulfate (PMS) for contaminants oxidation is still not clear as discussed by the authors , however, it has been shown that BQ can enhance the degradation and mineralization of bisphenol A (BPA).
Journal ArticleDOI
Microwave (MW)-assisted design of cobalt anchored 2D graphene-like carbon nanosheets (Co@GCNs) as peroxymonosulfate activator for tetracycline degradation and insight into the catalytic mechanism
TL;DR: In this article , cobalt anchored 2D graphene-like carbon nanosheets were fabricated by simple coordination of metal precursors into agarose through microwave assisted method to activate peroxymonosulfate (PMS) for tetracycline (TC) degradation.
Journal ArticleDOI
Magnetic Co-based carbon materials derived from core–shell metal–organic frameworks for organic contaminant elimination with peroxymonosulfates
TL;DR: The catalyst was constructed and first employed as an efficient heterogeneous catalyst to activate PMS for the removal of organic contaminants and the catalytic efficiency remarkably improved and the rate constant increased by 3-fold in the presence of Cl-, which always played a negative role and functioned as a ROS scavenger in a previous study.
Journal ArticleDOI
Effect and mechanism of oxidant on alkaline chemical mechanical polishing of gallium nitride thin films
TL;DR: In this article , a novel oxidant potassium peroxomonosulfate sulfate (2KHSO5·kHSO4·K2SO4) known as Oxone was also used to promote polishing efficiency and achieve a balance between efficiency and surface roughness.
References
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Journal Article
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TL;DR: Nine transition metals were tested for the activation of three oxidants and the generation of inorganic radical species such as sulfate, peroxymonosulfate, and hydroxyl radicals to postulate the rate-determining step of the redox reactions taking place when a metal is coupled with an oxidant in aqueous solution.
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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