▎ 摘　　要

A series of nitrogen-doped graphene-BiOBr (NG-BiOBr) nanocomposites with different weight addition ratios of nitrogen-doped graphene were firstly prepared by a facile solvothermal method, and found to possess a higher photocatalytic activity than pure BiOBr toward degradation of methyl orange in water under visible light irradiation. The NG-BiOBr composite with 1.76 wt% NG content exhibited the highest photodegradation efficiency of methyl orange, its degradation rate was about 50, 4.6 and 3.8 times of P25, BiOBr microsphere and 1.76 wt% RGO-BiOBr composite, respectively. The enhanced photocatalytic performance could be ascribed to more visible light harvest and more effective separation of photo-generated electron-hole pairs. (C) 2015 Elsevier B.V. All rights reserved.