Electrochemical preparation method of black phosphorus quantum dots

The invention discloses an electrochemical preparation method of black phosphorus quantum dots. An electrochemical intercalation method is adopted for dissolving black phosphorus crystals in an organic solvent so as to obtain the black phosphorus quantum dots. According to the specific implementation method, firstly, the black phosphorus crystals are fixed to a metal bar through conducting resin to serve as a working electrode, a platinum electrode serves as a counter electrode, and the working electrode and the counter electrode are placed in the organic solvent containing electrolytes; and then, the working electrode is connected to a positive electrode of a direct-current power source, the counter electrode is connected to a negative electrode of the direct-current power source, the voltage within the set range is applied, ion electrolytes are migrated to the black phosphorus crystals, and an electrochemical intercalation reaction is made, so that the black phosphorus quantum dots fall off to the organic solvent from the black phosphorus crystals, and black phosphorus quantum dot dispersion liquid is obtained. The preparation method of the black phosphorus quantum dots has the beneficial effects of being low in cost, capable of carrying out large-scale preparing, high in efficiency and short in production period.