▎ 摘　　要

Preparation of graphene from chemical reduction of graphene oxide ( GO) is recognized as one of the most promising methods for large-scale and low-cost production of graphene-based materials. This study reports a new, green, and efficient reducing agent ( caffeic acid/CA) for GO reduction. The CA-reduced GO (CA-rGO) shows a high C/O ratio (7.15) that is among the best rGOs prepared with green reducing reagents. Electronic gas sensors and supercapacitors have been fabricated with the CA- rGO and show good performance, which demonstrates the potential of CA- rGO for sensing and energy storage applications.