Abstract: Disclosed are a composite nanofiltration membrane for efficiently intercepting ammonium sulfate and ammonium nitrate and simultaneously adsorbing and removing mercury ions and a preparation method thereof, belonging to the technical field of industrial exhaust gas purification, wastewater purification and treatment and resource utilization. The preparation method of the composite nanofiltration membrane, comprising following steps: adding a cellulose nano fibrils colloid and a carboxylated carbon nanotubes-sodium dodecyl sulfate colloid into an MXene few layer dispersion solution to obtain a mixed dispersion solution, filtering the mixed dispersion solution in vacuum to a surface of a nanofiltration membrane, and standing and drying at room temperature to obtain a composite nanofiltration membrane.

Abstract: A preparation method and an application of a three-dimensional structured electric cathode based on cuprous oxide are provided by the present application. The preparation method includes the following steps: cutting copper foam, sequentially subjecting to ultrasonic treatment with acetone, hydrochloric acid, anhydrous ethanol and deionized water, followed by washing and vacuum drying to serve as an electrode substrate for later use; dissolving sodium acetate and copper acetate in deionized water, fully stirring for completely dissolution to obtain a solution, and adjusting a pH value of the solution to be acidic to serve as an electrodeposition precursor solution; and placing the copper foam in the electrodeposition precursor solution, electrodepositing at a predetermined temperature by using a three-electrode system and a potentiostatic method, followed by taking out, washing, and drying to obtain a catalytic electrode.

Abstract: A preparation method and an application of a three-dimensional structured electric cathode based on cuprous oxide are provided by the present application. The preparation method includes the following steps: cutting copper foam, sequentially subjecting to ultrasonic treatment with acetone, hydrochloric acid, anhydrous ethanol and deionized water, followed by washing and vacuum drying to serve as an electrode substrate for later use; dissolving sodium acetate and copper acetate in deionized water, fully stirring for completely dissolution to obtain a solution, and adjusting a pH value of the solution to be acidic to serve as an electrodeposition precursor solution; and placing the copper foam in the electrodeposition precursor solution, electrodepositing at a predetermined temperature by using a three-electrode system and a potentiostatic method, followed by taking out, washing, and drying to obtain a catalytic electrode.