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• W2913230079 abstract "Abstract Electrochemical oxidation is an effective mean to degrade non-biodegradable organics from the contaminated waters. However, its current efficiency is very low for the low-concentration organic pollutants treatment. In this work, combining with the outstanding adsorption property of CNT and the effective electrocatalytic oxidation performance of β-PbO2, we constructed novel layer-by-layer carbon nanotube/PbO2 anodes (CNT/PbO2-3, CNT/PbO2-4 and CNT/PbO2-5) with high adsorbability to enhance the electrochemical degradation efficiency of low-concentration sodium pentachlorophenate (PCP Na). In electrochemical oxidation tests, the PCP-Na was rapidly enriched in the CNT/PbO2 film through adsorption/electrosorption and then efficiently degraded in site. The removal efficiency of low-concentration PCP-Na (5 mg/L) on CNT/PbO2-4 reached 73.8% after only 5 min of electrolysis, whereas that on pure PbO2 was only 9.9%. To further clarify the mechanism of improvement of PCP-Na removal on CNT/PbO2-4 anode, the generation capacity of·OH radicals, oxygen evolution overpotential, voltammetric charge quantity, interface resistance, and specific surface area of CNT/PbO2-4 anode were also assessed and compared with those of other three anodes. Results showed that, in addition to the synergistic effect of adsorption/electrosorption and electrocatalysis, the more active sites, smaller electron transfer resistance and higher direct oxidation capacity of CNT/PbO2-4 anode also contributed to improving degradation rate of PCP-Na on CNT/PbO2-4 anode. Additionally the electrochemical degradation pathway of PCP-Na was also proposed based on the gas chromatography-mass spectrometry analysis. Finally, CNT/PbO2-4 electrode exhibited longer accelerated lifetime of 116 h than pure PbO2 electrode (91 h). Thus, these findings provide a new anode to improve the removal of low-concentration organic pollutants through combining electrochemical oxidation and adsorption/electrosorption processes." @default.
• W2913230079 created "2019-02-21" @default.
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• W2913230079 date "2019-03-01" @default.
• W2913230079 modified "2023-10-17" @default.
• W2913230079 title "A novel layer-by-layer CNT/PbO2 anode for high-efficiency removal of PCP-Na through combining adsorption/electrosorption and electrocatalysis" @default.
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• W2913230079 doi "https://doi.org/10.1016/j.electacta.2019.01.090" @default.
• W2913230079 hasPublicationYear "2019" @default.
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