▎ 摘　　要

NOVELTY - Graphene field effect transistor biosensor based on photocatalysis comprises substrate, an adhesion layer, a photocatalyst, and a single-layer graphene from bottom to top. The photocatalyst in the dispersed state is located between the graphene and the adhesion layer. Both ends of the graphene are provided with metal electrodes and lead wires, and there are conductive channels between the metal electrodes at both ends. USE - Graphene field effect transistor biosensor based on photocatalysis for preparing kit or device for detecting biomolecules (claimed). ADVANTAGE - The graphene field effect transistor biosensor based on photocatalysis effectively avoids the defects of insufficient sensing sensitivity and poor regeneration performance in the prior art and provides convenience for the further modification of the device surface to expand the multiple detection applications of the regenerable sensor. DESCRIPTION OF DRAWING(S) - The drawing shows a transfer characteristic curve of the renewable graphene field effect transistor biosensor obtained by the electrical signal detecting instrument, which can represent the change of the resistance and Dirac point, for indicating the device detecting the sensitivity of the biological molecule and the electrical characteristic change after multiple ultraviolet illumination after regeneration utilization. wherein the line 1-5 represents the first use, the second use (i.e., after ultraviolet light 1 irradiation regeneration) ..., the fifth use (i.e., after ultraviolet light 4 irradiation regeneration utilization) of the graphene transfer characteristic curve; line AA represents the transfer characteristic curve of the device when detecting the amino acid molecule. N-hydroxysuccinimide ester (1) Macromolecule adhesion layer (2) Single-layer sensing material (4) Metal electrode pair (5) Macromolecule resin (6)