Electro-driven multi-functional catalysis separation membrane reactor with wettability switchable for efficient water purification
The fragility, fouling and dull wettability of membrane materials greatly limit their wide range of applications. Here, inspired by the natural activation of nitrogen in soil by lightning, an electrically driven flow-through catalysis separation membrane reactor (CSMR) with switchable wettability is prepared. Catalytically active neutral and responsive switches can be firmly assembled on the membrane reactor with the support of MOFs to provide catalytic and wettability modulation functions. Remarkably, the wettability of the membrane reactor can transition from superhydrophobic to superhydrophilic states in a mere 10 s under applied voltage. It realizes the efficient separation of various oil-water mixtures (oilwater separation efficiency above 99%) and the electrocatalytic oxidation degradation (over 95% catalytic efficiency, flux above 4500 L m-2 h-1). The design of this multifunctional intelligent membrane reaction provides a scheme for the green and efficient treatment of actual wastewater, which may have broad potential in the construction and design of smart materials and electronic devices.
