▎ 摘　　要

Graphitic carbon nitride (g-C3N4) has drawn increasing interest as an efficient photocatalyst. To further improve its photocatalytic activity, herein we coupled g-C(3)N(4 )with graphene to construct ultrathin g-C3N4/graphene (g-C3N4/G) nanocomposites by a pyrolysis-sonication-hydrothermal method. Under the illumination of visible-light, g-C3N4/G nanocomposites with 10 wt.%G can degrade 92% Rhodamine B (RhB) in 120 min, which is higher than that (57%) from pure g-C3N4. Moreover, the recycling experiment indicates that the nanocomposite still remains excellent photocatalytic stability. Therefore, g-C3N4/G nanocomposites exhibit excellent photocatalytic activity and stability, resulting in a promising application in water purification.