One step synthesis of high-efficiency AgBr-Br-g-CN composite catalysts for photocatalytic HO production two channel pathway.

In this work, a two-component modified AgBr-Br-g-CN composite catalyst with outstanding photocatalytic HO production ability is synthesized. XRD, UV-Vis, N adsorption, TEM, XPS, EPR and PL were used to characterize the obtained catalysts. The as-prepared AgBr-Br-g-CN composite catalyst shows the highest HO equilibrium concentration of 3.9 mmol L, which is 7.8 and 19.5 times higher than that of GCN and AgBr. A "two channel pathway" is proposed for this reaction system which causes the remarkably promoted HO production ability. In addition, compared with another two-component modified catalyst, Ag-AgBr-g-CN, AgBr-Br-g-CN composite catalyst displays the higher photocatalytic HO production ability and stability.