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- W4296311729 abstract "Electrode materials are the core of electrocatalytic oxidation technology. Herein, chitosan (CTS)-modified halloysite nanotubes (HNTs) were used for the first time in the doping modification of PbO2 electrodes by electrodeposition technique, and novel HNTs-CTS-PbO2 anodes were prepared and used for the electrochemical removal of the thiazine dye methylene blue (MB). The surface structure information, electrochemical properties and oxidation activity of the materials were systematically investigated, and possible degradation pathways of methylene blue were proposed. The results showed that after doping modification, the coating became flatter and denser, and the crystalline shape and crystalline phase of the PbO2 electrode did not change, but the grain size was significantly reduced; moreover, the modified electrode had higher oxygen precipitation overpotential, larger reactive surface area and lower charge transfer resistance. Additionally, the decolorization degradation of MB by HNTs-CTS-PbO2 electrode mainly adopts an indirect degradation mechanism and follows the pseudo-first-order kinetic model, which exhibits higher decolorization degradation rate. Analyzing the mechanism of the electrochemical removal of MB from the modified anode, which mainly involves the breakage of CN bonds under the action of ·OH, followed by demethylation and aromatic ring cleavage to obtain monoaromatic amines, sulfonic acids and phenolic compounds, and finally mineralized into inorganic small molecules such as CO2 and H2O. The above results show that HNTs-CTS-PbO2 anode is a promising candidate in the field of dye wastewater degradation and provide new insights for the application of HNTs." @default.
- W4296311729 created "2022-09-20" @default.
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- W4296311729 date "2022-10-01" @default.
- W4296311729 modified "2023-09-26" @default.
- W4296311729 title "Enhanced electrochemical removal of dye wastewater by PbO2 anodes using halloysite nanotubes with different surface charge properties" @default.
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- W4296311729 doi "https://doi.org/10.1016/j.jelechem.2022.116816" @default.
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