Enhancement of Bifunctional Catalytic Performance of G‐C 3 N 4 @ Ag Composite by NaBH 4 Etching

Herein, a novel composite of g‐C 3 N 4 and silver nanoparticles(g‐C 3 N 4 @Ag) with enhanced bifunctional catalytic activity through chemical etching is reported. A kind of g‐C 3 N 4 @Ag composite by one‐pot route, then treated the product with sodium borohydride (NaBH 4 ) solution for a certain time is first synthesized. The property and morphology of the g‐C 3 N 4 @Ag composite changed greatly after the treatment. Compared with the pristine g‐C 3 N 4 @Ag composite, the NaBH 4 ‐etching endowed g‐C 3 N 4 @Ag composite (RACN) with smoother two‐dimensional plane structure, as well as an extension of the conjugate system which originating from the stronger chemical connection between the Ag nanoparticles and g‐C 3 N 4 . Furthermore, research results indicated that the RACN showed superior broad‐spectrum catalytic performance for the reduction of aromatic nitro compounds, and the catalytic efficiency of the RACN is enhanced dozens of times by the treatment. Moreover, the photocatalytic activity of the RACN is also greatly improved. This discovery provides an efficient and facile method toward the enhancement of catalytic activity of semiconductor and metal nanoparticle composites by chemical etching.