Hybrid persulfate/sonocatalysis for degradation of acid orange 7 in the presence of Ag2O/CuWO4 composite: Operating parameters and sonocatalytic mechanism

Liu, Yang-Cheng; Li, Xuan; Wang, Xin; Li, Duo; Chen, Chang-Lan; Xiang, Zheng

doi:10.1016/j.jclepro.2023.136287

Cited by 20 publications

(5 citation statements)

References 49 publications

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“…As presented in Figure , 16 varieties of degradation intermediates in AO7 degradation were conjectured via the mass library. Based on the quenching tests, EPR analysis, TOC result, HR-MS analysis, and relevant literature, – the plausible mechanism of AO7 elimination over the TPP-NO 2 -800/PMS system was suggested in Figure . As the N atom has a higher electronegativity, graphitic N of TPP-NO 2 -800 first obtains electrons from the adjacent C atoms in the TPP-NO 2 -800/PMS process .…”

Section: Results and Discussionmentioning

confidence: 99%

Selective ¹O₂ Generation from Peroxymonosulfate Activation over N-Doped Carbon Nanosponges for Pollutant Degradation

Zhou,

Fang,

Yang

et al. 2023

ACS Appl. Nano Mater.

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Recently, carbon-based nanomaterials have attracted significant attention as promising metal-free nanocatalysts for activating persulfates in wastewater treatment via nonradical oxidative pathways ( 1 O 2 and electron transfer). Herein, a series of N-doped carbon nanosponges have been designed and synthesized by calcination of organic porphyrins as efficient and metal-free nanocatalysts for activating peroxymonosulfate (PMS) on acid orange 7 (AO7) degradation via a nonradical pathway. In this work, the key point of this strategy is the choice of substituent groups (including −OH, −COOH, and −NO 2 ) on 5,10,15,20-tetraphenylporphyrin (TPP), which could serve both the heteroatom-doped source and the morphological conditioning agent. Further studies reveal that the doping of the N atom in carbon nanosponges could greatly improve their catalytic performance for activating PMS on AO7 degradation by regulating the morphology and physicochemical properties. The quenching tests and EPR analysis verified that 1 O 2 , which contributed to 74.0% of total AO7 degradation, is selectively produced from the TPP-NO 2 -800/PMS system without any radicals (e.g., SO 4 •−, O 2•− , and HO • ). The minor contribution (26.0%) for AO7 elimination is probably attributed to electron transfer between AO7 and PMS.

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Section: Results and Discussionmentioning

confidence: 99%

Selective ¹O₂ Generation from Peroxymonosulfate Activation over N-Doped Carbon Nanosponges for Pollutant Degradation

Zhou,

Fang,

Yang

et al. 2023

ACS Appl. Nano Mater.

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“…In the process of its formation to breaking, a large amount of energy released will generate local hot spots and be accompanied by sonoluminescence. 54 The energy generated by ultrasound (e.g., in the form of an optical cavity) causes an electron excitation in the semiconductor from the conduction band (CB) to the valence band (VB), generating the electronhole pairs. The conduction band position of FN3 is À0.26 V, not close to the À0.…”

Section: Ultrasound Degradationmentioning

confidence: 99%

“… 7 Among them, acid orange 7 (AO7) is a widely used anionic azo dye, which is not only highly aromatic and toxic to microorganisms, but also has azo groups that effectively resist biodegradation. 8,9 Since AO7 is produced in large quantities, widely used, and difficult to degrade, it is imperative to study how to completely degrade it into harmless substances.…”

Section: Introductionmentioning

confidence: 99%

One-pot hydrothermal synthesis of FeNbO₄ microspheres for effective sonocatalysis

He,

Li,

Liu

et al. 2024

New J. Chem.

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“…This process is largely based on the phenomenon of acoustic cavitation, which is defined as the growth and collapse of pre-existing microbubbles under the influence of an ultrasonic field in liquids. The formation of bubbles is due to the strong decline in local instantaneous pressure induced by strong ultrasound or by some hydrodynamic motion ( Mondal et al, 2021 ; Liu et al, 2023 ). Under optimum conditions, the bubbles are likely to collapse very violently due to their inherent spherical geometry and the inertia of the surrounding liquid.…”

Section: Sonophotocatalysis Mechanismmentioning

confidence: 99%

Advances on sonophotocatalysis as a water and wastewater treatment technique: efficiency, challenges and process optimisation

Mapukata,

Ntsendwana,

Mokhena

et al. 2023

Front. Chem.

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Due to water shortage and increased water pollution, various methods are being explored to improve water quality by treating contaminants. Sonophotocatalysis is a combination of two individual water treatment processes i.e., photocatalysis and sonocatalysis. With advantages including shorter reaction times and enhanced activity, this technique shows possible futuristic applications as an efficient water treatment technology. Herein, background insight on sonophotocalysis as a water and wastewater treatment technique as well as the general mechanism of activity is explained. The commonly used catalysts for sonophotocatalytic applications as well as their synthesis pathways are also briefly discussed. Additionally, the utilisation of sonophotocatalysis for the disinfection of various microbial species as well as treatment of wastewater pollutants including organic (dyes, pharmaceuticals and pesticides) and inorganic species (heavy metals) is deliberated. This review also gives a critical analysis of the efficiency, enhancement strategies as well as challenges and outlooks in this field. It is thus intended to give insight to researchers in the context of facilitating future developments in the field of water treatment, and advancing sonophotocatalysis towards large-scale implementation and commercialization.

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Hybrid persulfate/sonocatalysis for degradation of acid orange 7 in the presence of Ag2O/CuWO4 composite: Operating parameters and sonocatalytic mechanism

Cited by 20 publications

References 49 publications

Selective ¹O₂ Generation from Peroxymonosulfate Activation over N-Doped Carbon Nanosponges for Pollutant Degradation

Selective ¹O₂ Generation from Peroxymonosulfate Activation over N-Doped Carbon Nanosponges for Pollutant Degradation

One-pot hydrothermal synthesis of FeNbO₄ microspheres for effective sonocatalysis

Advances on sonophotocatalysis as a water and wastewater treatment technique: efficiency, challenges and process optimisation

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Hybrid persulfate/sonocatalysis for degradation of acid orange 7 in the presence of Ag2O/CuWO4 composite: Operating parameters and sonocatalytic mechanism

Cited by 20 publications

References 49 publications

Selective 1O2 Generation from Peroxymonosulfate Activation over N-Doped Carbon Nanosponges for Pollutant Degradation

Selective 1O2 Generation from Peroxymonosulfate Activation over N-Doped Carbon Nanosponges for Pollutant Degradation

One-pot hydrothermal synthesis of FeNbO4 microspheres for effective sonocatalysis

Advances on sonophotocatalysis as a water and wastewater treatment technique: efficiency, challenges and process optimisation

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Product

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Selective ¹O₂ Generation from Peroxymonosulfate Activation over N-Doped Carbon Nanosponges for Pollutant Degradation

Selective ¹O₂ Generation from Peroxymonosulfate Activation over N-Doped Carbon Nanosponges for Pollutant Degradation

One-pot hydrothermal synthesis of FeNbO₄ microspheres for effective sonocatalysis