PTFE conductive membrane for EVMD process and the application of electro-catalysis
作者：Liu, Huan Huang, Qinglin Wang, Yafeng Xiao, Changfa
關(guān)鍵字：PTFE conductive membrane EVMD Membrane fouling Electrochemical cleaning Electro-catalytic
論文來源：期刊
具體來源：Separation and Purification Technology
發(fā)表時間：2017年
To inhibit membrane fouling and to overcome the disadvantages of traditional conductive membranes,
polytetrafluoroethylene (PTFE) flat sheet membrane was used as the substrate to prepare a flexible conductive
membrane. Multi-walled carbon nanotubes (MWCNTs) and mixture of MWCNTs/graphene (mass
ratio 1:1) were employed as conductive layer. PTFE conductive membrane acted as a cathode which was
applied in EVMD (Electric vacuum membrane distillation) process to mitigate membrane fouling. The MD
flux increased from 4.97 to 8.89 L/m2 h which was because of not only electric field repulsion but also the
effect of electro-catalysis. MD flux recovered from 8.51 to 11.68 L/m2 h after electrochemical cleaning
(EC) for 4 h fixing electric field strength at 1.5 v/cm. Meanwhile PTFE conductive membrane was
employed in electro-catalytic degradation experiment, in which nano-TiO2 was used as the electrocatalyst.
In the electro-catalytic degradation experiment, the degradation rate of rhodamine red dye
was up to 99.25%, and composite membranes exhibited good electro-catalytic stability.