▎ 摘　　要

NOVELTY - Preparing black phosphorene- MXene composite film, involves(1) performing : electrochemically stripping the blocky black phosphorus in an organic solvent of organic salt to obtain fluffy black phosphorus (2) mixing fluffy black phosphorus with the solution, performing ultrasonic treatment and centrifugal washing to obtain supernatant, namely the solution containing the black phosphorus alkene nanosheets, and performing freeze drying to obtain black phosphorus alkene powder (3) mixing lithium salt with an acid solution to obtain a mixed solution, (4) adding three-dimensional layered titanium-aluminum chloride powder to mixture, stirring uniformly, centrifuged and washed, and freeze-drying to obtain MXene powder, and (5) adding black phosphor alkene powder obtained in the step (6), adding MXene solution to brown reagent bottle according to mass percentage of 1:1, stacking the composite dispersion on the substrate through nanosheets self-assembly technology, and drying. USE - Preparation method of black phosphorene-MXene composite film used in film separating technical field for separation of hydrogen films. Uses include but are not limited to graphene oxide film, graphene oxide, black phosphorus film, molybdenum disulfide film, metal organic frame material (MOF) film and MXene film. ADVANTAGE - The black phosphorene-MXene composite film has good stability, high hydrogen permeability, high gas selectivity, and excellent mechanical performance. The preparation process is simple, the energy consumption is low, and it can save cost in practical application. DESCRIPTION OF DRAWING(S) - The drawing shows a preparation of the phosphorene -MXene composite film.