▎ 摘　　要

The lignin residue produced by straw fermentation or straw acid hydrolysis is used as a carbon source to synthesize graphene. After adding tetrahydrofuran as a modifier and Fe(NO3)(3) as a catalyst to lignin for pretreatment, the resulting product was heat treated at 900 degrees C for 3 h. The prepared graphene was characterized by XRD, Raman, HRTEM, and the electrochemical properties of the prepared graphene also were tested. The results of this study open up a new way for the efficient preparation of graphene based on renewable resources lignin. The prepared lignin-based graphene was used for electrochemical testing and found to be a good electrode material for super capacitors.