▎ 摘　　要

NOVELTY - Preparation of graphene/lignin composite porous carbon sheet material comprises mixing graphene oxide and sodium lignosulfonate under inert gas protection and carbonizing; mixing with potassium hydroxide, grinding under inert gas protection, and activating; and soaking in hydrochloric acid, vacuum filtering, washing with deionized water, distilled water or hot water, and drying. USE - Method for preparing graphene/lignin composite porous carbon sheet material used for absorbing ciprofloxacin in water (claimed). ADVANTAGE - The carbon sheet material has high specific surface area and can be widely used in the field of adsorption and separation as catalyst carrier.