▎ 摘　　要

The direct C-H trifluoromethylation of arenes catalyzed by graphene oxide (GO) under safe conditions is described. This strategy is metal-free, initiator-free, safe, and scalable. It employs a readily available CF3 source and the reaction can be easily controlled to obtain a mono-trifluorinated product. This method opens a new avenue for GO-catalyzed chemistry.