Recent progress in engineering approach towards the design of PbO2-based electrodes for the anodic oxidation of organic pollutants

Zhang, Zhengting; Yi, Guiyun; Peng, Li; Wang, Xikui; Wang, Xiaodong; Zhang, Chuanxiang

doi:10.1016/j.jwpe.2021.102173

Cited by 40 publications

(8 citation statements)

References 94 publications

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“…This is because •OH was generated by water splitting under electrochemical oxidation on the electrode surface, and •OH reacts with pollutants to degrade it. 45 When the concentration of pollutants increased, the rate of •OH generated was lower than the diffusion of pollutants, and more and more pollutants were transferred to the electrode surface. At the same time, there were intermediate products generated by the reaction on the electrode surface to compete with pollutants to consume active substances.…”

Section: Resultsmentioning

confidence: 99%

CMS and Nd Co-Modified PbO₂ Electrodes with Enhanced Lifetime and Electrochemical Activity for the Degradation of Bisphenol S

Chen,

Tao,

Wang

et al. 2023

J. Electrochem. Soc.

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In this study, a lead dioxide electrode co-modified with carbon microspheres and neodymium (CMS-Nd-PbO2) was prepared. The structural morphology and electrochemical properties of the four electrodes, PbO2, CMS-PbO2, Nd-PbO2, and CMS-Nd-PbO2, were compared by field emission scanning electron microscopy, X-ray diffractometer, X-ray photoelectron spectroscopy, cyclic voltammetry, and electrochemical impedance, respectively. The results showed that the prepared CMS-Nd-PbO2 electrode had higher surface denseness and higher electrode activity. Based on the accelerated lifetime experiment, the actual working life of four electrodes was studied, and the CMS-Nd-PbO2 electrode had a relatively long lifetime, increased 24.60% compared with the PbO2 electrode. The influencing parameters of electrochemical degradation of bisphenol S (BPS) by CMS-Nd-PbO2 electrode, the ability of different electrodes to generate hydroxyl radicals, reaction mechanism, and the possible BPS degradation pathways were also discussed. Further, the safety of the prepared electrode was evaluated. Under the optimal parameters, the removal rate of BPS and chemical oxygen demand (COD) were 96.49% and 51.84%, respectively. The dissolved lead ion concentration in the solution after electrochemical oxidation was lower than the WHO standard. The CMS-Nd-PbO2 electrode showed promising applications in the degradation of emerging contaminants wastewater.

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Section: Resultsmentioning

confidence: 99%

CMS and Nd Co-Modified PbO₂ Electrodes with Enhanced Lifetime and Electrochemical Activity for the Degradation of Bisphenol S

Chen,

Tao,

Wang

et al. 2023

J. Electrochem. Soc.

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“…PbO 2 is another common nonactive metal oxide anode used in water remediation attributed to the merits of high overpotential for oxygen evolution, strong oxidation ability, chemical stability, facile preparation, good electrical conductivity and low cost. 110 The removal of nitrobenzene and total organic carbon (TOC) from the treated wastewater (50 mg L −1 ) reached 89.35% and 74.23%, respectively, when hydrophobic PbO 2 anodes were modified by sodium dodecyl benzene sulfonate. A higher generation rate of active ˙OH ( k [˙OH] = 28.59 min −1 ) on the surface of this hydrophobic PbO 2 has been confirmed by various techniques such as electron paramagnetic resonance (EPR), high-performance liquid chromatography (HPLC) and UV absorbance spectrometry.…”

Section: Emerging Electrocatalysts For Eaopsmentioning

confidence: 99%

Emerging electrocatalysts for electrochemical advanced oxidation processes (EAOPs): recent progress and perspectives

Shu

Ming

et al. 2023

Mater. Chem. Front.

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“…22−24 Furthermore, metal oxide electrode materials have been proven to act as exceptional catalysts for conducting heterogeneous catalysis processes, while eliminating the risk of secondary pollution due to residual metal ions. 25,26 More significantly, cobalt oxide (Co investigated to meditate activation of PMS via Co(III)/Co(II) redox cycling. 27,28 However, their insufficient active sites and weak structural stability still leave much room for further improvement in efficiency.…”

Section: Introductionmentioning

confidence: 99%

Oxygen Vacancy-Enhanced Electrocatalytic Degradation of Tetracycline over a Co₃O₄–La₂O₃/Peroxymonosulfate System

Zhao,

Wang,

et al. 2024

ACS EST Water

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Peroxymonosulfate (PMS) activated by metal oxides has been developed as a promising approach for advanced oxidation processes in the treatment of antibiotic containing wastewater; however, rapid and effective activation of PMS still lacks reasonable catalyst-oriented design. Here, by fabricating a Co 3 O 4 −La 2 O 3 bimetallic oxide electrode to implement defect engineering, we report an oxygen vacancy (OV)-mediated PMS activation electrocatalytic system for degradation of tetracycline (TC). The rare earth metal oxide La 2 O 3 was used to modify Co 3 O 4 and introduce OVs as active sites, where PMS is activated to produce reactive species. OVs in the Co 3 O 4 −La 2 O 3 composites facilitate the generation of singlet oxygen ( 1 O 2 ), which mediates the activation of PMS via a non-radical pathway. When the ratio of Co to La was 2:1, the system Co 3 O 4 −La 2 O 3 /PMS had a degradation efficiency for TC of more than 97.50% and a mineralization rate of up to 62.97% within 40 min. Overall, the findings on the defect-engineered materials for antibiotic degradation could provide an effective strategy for the treatment of antibiotic containing wastewater with low energy consumption and pollution.

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Recent progress in engineering approach towards the design of PbO2-based electrodes for the anodic oxidation of organic pollutants

Cited by 40 publications

References 94 publications

CMS and Nd Co-Modified PbO₂ Electrodes with Enhanced Lifetime and Electrochemical Activity for the Degradation of Bisphenol S

CMS and Nd Co-Modified PbO₂ Electrodes with Enhanced Lifetime and Electrochemical Activity for the Degradation of Bisphenol S

Emerging electrocatalysts for electrochemical advanced oxidation processes (EAOPs): recent progress and perspectives

Oxygen Vacancy-Enhanced Electrocatalytic Degradation of Tetracycline over a Co₃O₄–La₂O₃/Peroxymonosulfate System

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Recent progress in engineering approach towards the design of PbO2-based electrodes for the anodic oxidation of organic pollutants

Cited by 40 publications

References 94 publications

CMS and Nd Co-Modified PbO2 Electrodes with Enhanced Lifetime and Electrochemical Activity for the Degradation of Bisphenol S

CMS and Nd Co-Modified PbO2 Electrodes with Enhanced Lifetime and Electrochemical Activity for the Degradation of Bisphenol S

Emerging electrocatalysts for electrochemical advanced oxidation processes (EAOPs): recent progress and perspectives

Oxygen Vacancy-Enhanced Electrocatalytic Degradation of Tetracycline over a Co3O4–La2O3/Peroxymonosulfate System

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Product

Resources

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CMS and Nd Co-Modified PbO₂ Electrodes with Enhanced Lifetime and Electrochemical Activity for the Degradation of Bisphenol S

CMS and Nd Co-Modified PbO₂ Electrodes with Enhanced Lifetime and Electrochemical Activity for the Degradation of Bisphenol S

Oxygen Vacancy-Enhanced Electrocatalytic Degradation of Tetracycline over a Co₃O₄–La₂O₃/Peroxymonosulfate System