▎ 摘　　要

In this study, a simple low-temperature solution-impregnation method was developed for the fabrication of highly efficient AgBr photocatalyst with cooperation effect of Cu (II) cocatalyst and graphene. Photocatalytic experimental results for the depolarization of methyl orange (MO) aqueous solution indicated that the AgBr with cooperation effect of Cu(II) cocatalyst and graphene displayed very good photocatalytic activity. Especially, Cu(I) (0.5 mol.L-1)/AgBr-rGO(0.5wt%) (rGO, reduced graphene oxide) showed the highest photocatalytic activity with a rate constant 0.027 31 min(-1), while this value is higher than that of the pure AgBr (0.008 07 min(-1)), AgBr-rGO (0.5%) (0.015 98 min(-1)) and Cu(II) (0.5 mol.L-1)/AgBr (0.015 19 min(-1)) by a factor of 3.38, 1.7 and 1.8, respectively. The reason for enhanced photocataiytic performance is that Cu(II) can quickly catch the photogenerated electrons from AgBr and graphene has large specific surface which may provide a lot reduction active sites for Cu(II), resulting in a rapid separation of photogenerated electrons and holes. This work may provide the new insights for the preparation of high performance AgBr photocatalyst.