Corresponding Author

Hong WANG(waho7808@163.com)


Nano-manganese oxide loaded on titanium electrocatalytic membrane electrodes (nano-MnOx/Ti) were synthesized bysol-gel method using porous Ti membrane as a substrate and the manganese acetate as a raw material without releasing NOx. X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and Field-emission scanning electron microscopy (FESEM) were employed to characterize crystal form, valence state and surface morphology of nano-MnOx, respectively. Cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and chronoamperometry (CA) were used to investigate the electrochemical properties of nano-MnOx electrode. The results indicated that the MnOx catalysts consisted of γ-MnO2 and Mn2O3 nanorods with the diameter of 50 nm, which distributed uniformly on the Ti membrane. The electrochemical performance and catalytic performance of the membrane electrode improved obviously after the loading of the catalyst. The formation of chemical bond between Ti and MnOx led a good stability of MnOx/Ti membrane electrode. The electrocatalytic membrane reactor (ECMR) was assmblied by using nanorods the MnOx/Ti membrane as an anode and a stainless steel mesh as a cathode for the phenolic wastewater treatment (10 mmol·L-1). It was found that the COD removal rate of ECMR was up to 95.1% at current density of 0.25 mA·cm-2and residence time of 15 min.

Graphical Abstract


electrocatalytic membrane reactor, MnOx/Ti membrane, manganese oxide, phenolic wastewater treatment, catalytic oxidation

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