▎ 摘　　要

A series of nitrogen-doped graphene-Ag2CO3 (NG-Ag2CO3) composites with different weight addition ratios of NG as a visible-light-induced photocatalyst were fabricated through a facile precipitation method. It was found that NG-Ag2CO3 composite with a proper addition amount of NG exhibited higher photocatalytic activity and improved anti-photocorrosion than Ag2CO3 toward degradation of rhodamine B (RhB) in water under visible light irradiation. The rodlike Ag2CO3 sub-microcrystals with 4.5 wt% NG content exhibited the highest photodegradation efficiency of RhB (92% in 60 min), which was about 1.2 times of pure Ag2CO3 sub-microcrystals (76% in 60 min). The improved photocatalytic performance could be ascribed to the enhanced visible light absorption efficiency and more effective separation of photo-generated electron-hole pairs. (C) 2015 Elsevier B.V. All rights reserved.