Preparations of Nano-Manganite Loaded Titanium Electocatalytic Membrane Electrode for Phenolic Wastewater Treatment

Authors

Le LI, State Key Laboratory of Separation Membranes and Membrane Processes, School of Materials Science and Engineering, Tianjin Polytechnic University, Tianjin 300387, China;
Hong WANG, State Key Laboratory of Separation Membranes and Membrane Processes, School of Materials Science and Engineering, Tianjin Polytechnic University, Tianjin 300387, China;Key Laboratory of Advanced Energy Materials Chemistry, Ministry of Education, Nankai University, Tianjin 300071, China;Follow
Rong-hua MA, State Key Laboratory of Separation Membranes and Membrane Processes, School of Materials Science and Engineering, Tianjin Polytechnic University, Tianjin 300387, China;
Hong-sen HUI, State Key Laboratory of Separation Membranes and Membrane Processes, School of Materials Science and Engineering, Tianjin Polytechnic University, Tianjin 300387, China;
Xiao-ping LIANG, State Key Laboratory of Separation Membranes and Membrane Processes, School of Materials Science and Engineering, Tianjin Polytechnic University, Tianjin 300387, China;
Jian-xin LI, State Key Laboratory of Separation Membranes and Membrane Processes, School of Materials Science and Engineering, Tianjin Polytechnic University, Tianjin 300387, China;Collaborative Innovation Center for Eco-Textiles of Shandong Province, 308 Ningxia Road, Qingdao 266071, Shandong, China;

Corresponding Author

Hong WANG(waho7808@163.com)

Abstract

Nano-manganese oxide loaded on titanium electrocatalytic membrane electrodes (nano-MnO_x/Ti) were synthesized bysol-gel method using porous Ti membrane as a substrate and the manganese acetate as a raw material without releasing NO_x. 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-MnO_x, respectively. Cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and chronoamperometry (CA) were used to investigate the electrochemical properties of nano-MnO_x electrode. The results indicated that the MnO_x 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 MnO_x led a good stability of MnO_x/Ti membrane electrode. The electrocatalytic membrane reactor (ECMR) was assmblied by using nanorods the MnO_x/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

Keywords

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

DOI Link

https://doi.org/10.13208/j.electrochem.180216

Publication Date

2018-08-28

Online Available Date

2018-05-11

Revised Date

2018-04-19

Received Date

2018-02-16

Recommended Citation

Le LI, Hong WANG, Rong-hua MA, Hong-sen HUI, Xiao-ping LIANG, Jian-xin LI. Preparations of Nano-Manganite Loaded Titanium Electocatalytic Membrane Electrode for Phenolic Wastewater Treatment[J]. Journal of Electrochemistry, 2018 , 24(4): 309-318.
DOI: 10.13208/j.electrochem.180216
Available at: https://jelectrochem.xmu.edu.cn/journal/vol24/iss4/2