▎ 摘　　要

NOVELTY - Method for preparing the laser-induced electrocatalyst-semiconductor-three-dimensional porous graphene ternary composite photoelectrode involves adopting laser-induced synchronous preparation method, dissolving the metal ion precursor required for the preparation of laser-induced electrocatalysts and the metal ion precursor required for the preparation of laser-induced semiconductors into N,N-dimethylformamide (DMF), adding the polysulfone polymer and magnetically stirring until dissolves, spinning the resulting viscous solution onto the surface of the indium tin oxide conductive glass, and heating in a vacuum, forming metal ion-polysulfone polymer composite film on the surface of indium tin oxide conductive glass, using carbon dioxide infrared laser (l equal to 10.64 mm) engraving machine to engrave the pre-designed photoelectrode pattern onto the surface of the metal ion-polyethersulfone composite membrane. USE - The photoelectrode used for detecting glucose concentration in alkaline glucose sample solution (claimed). DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing the electrocatalyst-semiconductor-three-dimensional porous graphene ternary composite photoelectrode involving (i) adding 0.12-0.18 g metal ion precursor required for the preparation of laser-induced electrocatalysts and 0.09-0.13 g metal ion precursor required for the preparation of laser-induced semiconductors into 20-30 ml dimethylformamide solution, performing magnetic force stirring to dissolve completely, (ii) adding 2-3 g polysulfone polymer to the solution obtained in the step (i) in 3-5 times (time interval is 20-30 minutes), and continuously stirring to form a metal ion-containing polysulfone polymer with certain viscosity substance solution, (iii) spin-coating the metal ion-containing polysulfone polymer solution synthesized in the step (ii) onto the cleaned indium tin oxide conductive glass surface to form a uniform metal ion-containing polysulfone polymer solution film on the surface of the indium tin oxide conductive glass, where the spin coating speed is 2000-3000rpm, and the spin coating time is 80-100 seconds, (iv) vacuum-preserving the indium tin oxide conductive glass modified by the metal ion-containing polysulfone polymer solution film modified for 1-2 hour at 75-100 degrees C to make the solvent volatilize and preparing indium tin oxide conductive glass metal ion-doped polysulfone polymer membrane on the surface, and (v) cooling the metal ion-doped polysulfone polymer film obtained in the step (iv) to normal temperature, placing on the working platform of the carbon dioxide laser engraving machine, and using the carbon dioxide laser to scan the surface of the metal ion-doped polysulfone polymer film to remove the indium oxide and synchronously transforming it into an electrocatalyst-semiconductor-three-dimensional porous graphene ternary composite photoelectrode.