▎ 摘　　要

Herein, we proposed a novel approach to prepare the graphene with high quality, which was realized by exfoliating the KOH-etched graphite in H2O2 solution under microwave irradiation. The as-prepared graphene exhibits a smooth and transparent feature, and possesses high electrical conductivity of up to 2 x 10(5) S m(-1) . Compared with the conventional oxidation-reduction method, the present method is significantly efficient, and, most importantly, does not involve the use of acid and strong oxidizing agent, which will make it more competent in the scalable production of graphene. (C) 2018 Elsevier B.V. All rights reserved.