▎ 摘　　要

NOVELTY - Preparing graphene powder from lignin involves dissolving lignin in deionized water and adding 5-10 wt.% aqueous sodium hydroxide to adjust pH of mixture at 10-12. The solution is mixed and lignin is treated with aqueous sodium hydroxide in certain volume ratio to obtain 0.01-1 g/L graphene oxide solution. The graphene oxide solution is subjected to hydrothermal reaction at 120-160 degrees C for 1-24 hours to obtain graphene solution. The obtained graphene solution is repeatedly washed with ethanol and deionized water. The solution is centrifuged and dried to obtain graphene powder. USE - Method for preparing graphene powder from lignin (claimed). ADVANTAGE - The method enables to prepare graphene powder from lignin in simple, eco-friendly and cost-effective manner that has good dispersibility and good stability.