▎ 摘　　要

In this paper, a simple and efficient electrochemical sensor based on indium sulfide nanosheet arrays (In2S3 NSAs) grown on 3D graphene (3D Gr) has been developed. 3D Gr was obtained by chemical vapor deposition (CVD) and In2S3 NSAs were prepared by a hydrothermal method. The composite (In2S3 NSAs-3D Gr) has a large accommodation space to contact with biological molecules. The current generated by the redox reaction of epinephrine (EP) on the surface of the In2S3 NSAs-3D Gr becomes an important indicator of the sensor value. The sensitivity of the sensor for the detection of EP in the range of 0-60 mu m is 2.46 mu A mu M- 1 with a detection limit of 0.12 mu M (S/N = 3). Meanwhile, the novel sensor has a good stability and selectivity. It also has potential for real detection of EP in human serum.