Preparation and characterization of ZnO/PEG-Co(II)-PbO2 nanocomposite electrode and an investigation of the electrocatalytic degradation of phenol

Gui, Lai; Chen, Zhe; Chen, Bangyao; Song, Yuzhu; Yu, Qiang; Zhu, Wei; Hu, Qi; Liu, Yuanyuan; Zheng, Zhaoyi; Lv, Ze; You, Hongjun; Yeasmin, Farhana

doi:10.1016/j.jhazmat.2020.123018

Cited by 72 publications

(8 citation statements)

References 45 publications

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“…PbO 2 -based anodes are also known for •OH generation. Gui et al showed an average degradation efficiency for 100 mg L −1 phenol of 91.1% with this type of electrode [27]. Unfortunately, PbO 2 anodes are known to release toxic Pb 2+ ions and have lower activity rates in comparison to BDD anodes [2].…”

Section: Introductionmentioning

confidence: 97%

Improving the Treatment Efficiency and Lowering the Operating Costs of Electrochemical Advanced Oxidation Processes

Muddemann

Neuber²,

Haupt

et al. 2021

Processes

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Electrochemical advanced oxidation processes (EAOP®) are promising technologies for the decentralized treatment of water and will be important elements in achieving a circular economy. To overcome the drawback of the high operational expenses of EAOP® systems, two novel reactors based on a next-generation boron-doped diamond (BDD) anode and a stainless steel cathode or a hydrogen-peroxide-generating gas diffusion electrode (GDE) are presented. This reactor design ensures the long-term stability of BDD anodes. The application potential of the novel reactors is evaluated with artificial wastewater containing phenol (COD of 2000 mg L−1); the reactors are compared to each other and to ozone and peroxone systems. The investigations show that the BDD anode can be optimized for a service life of up to 18 years, reducing the costs for EAOP® significantly. The process comparison shows a degradation efficiency for the BDD–GDE system of up to 135% in comparison to the BDD–stainless steel electrode combination, showing only 75%, 14%, and 8% of the energy consumption of the BDD–stainless steel, ozonation, and peroxonation systems, respectively. Treatment efficiencies of nearly 100% are achieved with both novel electrolysis reactors. Due to the current density adaptation and the GDE integration, which result in energy savings as well as the improvements that significantly extend the lifetime of the BDD electrode, less resources and raw materials are consumed for the power generation and electrode manufacturing processes.

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Section: Introductionmentioning

confidence: 97%

Improving the Treatment Efficiency and Lowering the Operating Costs of Electrochemical Advanced Oxidation Processes

Muddemann

Neuber²,

Haupt

et al. 2021

Processes

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“…Researchers have modied and rened PbO 2 electrodes by inserting ions, 1,2 doping with active and inert particles, 3,4 and changing the structure of PbO 2 . [5][6][7] As a result, the electrochemical reactivity of the PbO 2 electrode is enhanced and the application range of the PbO 2 electrode is expanded. In the electrocatalytic reaction, element doping can produce more oxygen defects, increase active sites, and improve the redox ability of electrode materials.…”

Section: Introductionmentioning

confidence: 99%

Micro-area investigation on electrochemical performance improvement with Co and Mn doping in PbO₂ electrode materials

Chen

et al. 2021

RSC Adv.

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“…S9). Based on the current results and on previous research, 36,54 the potential degradation pathway of phenol was proposed (Fig. 8(c)).…”

Section: Resultsmentioning

confidence: 68%

Efficient activation of peroxymonosulfate by 3D hollow petal‐like spherical NiCo₂O₄ nanomaterials for the decomposition of phenol solution: performance and mechanism

Yue

Hao

et al. 2022

J of Chemical Tech & Biotech

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BACKGROUND: Phenolic pollutant contamination is a serious problem. The advanced oxidation process based on sulfate radicals (SR-AOPs) is an efficient technology for the degradation of phenolic contaminants in the aquatic environment. Bimetallic nanomaterials have attracted much attention because of their excellent catalytic performance in activating peroxymonosulfate (PMS). Herein, 3D mesoporous NiCo 2 O 4 hollow petal spheres with a specific surface area of 252.35 m 2 g −1 were successfully prepared.RESULTS: In the NiCo 2 O 4 /PMS system, phenol (50 mg L −1 ) was absolutely removed within 25 min with a degradation rate constant (k) of 0.19651 min −1 , which is 6.2 times higher than that of the Co 3 O 4 /PMS system. The excellent catalytic activity of NiCo 2 O 4 is attributed to the larger amount of redox cycles of Co 3+ /Co 2+ and Ni 3+ /Ni 2+ as well as its large specific surface area and multi-step pore channel structure. Moreover, the related influencing factors were systematically researched in the NiCo 2 O 4 /PMS system, including reaction temperature, solution pH, initial concentration, catalyst and PMS dose, as well as matrix species (HCO 3 − , Cl − , NO 3 − , and humic acid). The recycling tests revealed the outstanding chemical stability of NiCo 2 O 4 . The electron paramagnetic resonance (EPR) and quenching experiments verify that sulfate radical (SO 4 • −) acts as the leading role for phenol decomposition. The possible degradation path was proposed based on the several major degradation intermediates that were detected by Gas Chromatography-Mass Spectrometer (GC-MS).CONCLUSION: This research provides a facile and mild method for the fabrication of promising 3D heterogeneous catalysts for PMS activation and provides a green and promising technology for effective contaminant control in modern wastewater remediation.

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Preparation and characterization of ZnO/PEG-Co(II)-PbO2 nanocomposite electrode and an investigation of the electrocatalytic degradation of phenol

Cited by 72 publications

References 45 publications

Improving the Treatment Efficiency and Lowering the Operating Costs of Electrochemical Advanced Oxidation Processes

Improving the Treatment Efficiency and Lowering the Operating Costs of Electrochemical Advanced Oxidation Processes

Micro-area investigation on electrochemical performance improvement with Co and Mn doping in PbO₂ electrode materials

Efficient activation of peroxymonosulfate by 3D hollow petal‐like spherical NiCo₂O₄ nanomaterials for the decomposition of phenol solution: performance and mechanism

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Preparation and characterization of ZnO/PEG-Co(II)-PbO2 nanocomposite electrode and an investigation of the electrocatalytic degradation of phenol

Cited by 72 publications

References 45 publications

Improving the Treatment Efficiency and Lowering the Operating Costs of Electrochemical Advanced Oxidation Processes

Improving the Treatment Efficiency and Lowering the Operating Costs of Electrochemical Advanced Oxidation Processes

Micro-area investigation on electrochemical performance improvement with Co and Mn doping in PbO2 electrode materials

Efficient activation of peroxymonosulfate by 3D hollow petal‐like spherical NiCo2O4 nanomaterials for the decomposition of phenol solution: performance and mechanism

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Product

Resources

About

Micro-area investigation on electrochemical performance improvement with Co and Mn doping in PbO₂ electrode materials

Efficient activation of peroxymonosulfate by 3D hollow petal‐like spherical NiCo₂O₄ nanomaterials for the decomposition of phenol solution: performance and mechanism