Interface-engineered Ni(Fe/Al)-LDHs/g-C3N4 nanosheets with metallic Fe/Al N bonds for efficient photocatalytic degradation of tetracycline hydrochloride

• A in-situ growth method can be used to prepare Ni(Fe/Al)-LDHs/g-C 3 N 4 nanosheets with dual-active-sites for efficient photocatalytic degradation of TCH . • The formation of Fe/Al N bonds, which enables provide an interfacial charge transfer channel in photocatalytic process. • The metal Ni and Fe/Al on the surface of Ni(Fe/Al)-LDHs/g-C 3 N 4 nanosheets can furnish more photocatalytic active sites and interface synergy. To improve the photogenerated electron–hole separation efficiency and the number of reactive oxygen species of g-C 3 N 4 in visible light. Herein, an interface-engineered Ni(Fe/Al)-LDHs/g-C 3 N 4 nanosheets with Fe/Al N bonds were prepared, which shows highly enhanced photocatalytic degradation performance with excellent structural stability. The interfacial structure of g-C 3 N 4 was precisely regulated by metal Fe/Al on the surface of layered double hydroxides (LDHs), which could form Fe/Al N bonds as the interfacial charge transfer channels. In addition, the metal Ni and Fe/Al on the surface of LDHs nanosheets can furnish more photocatalytic active sites and interface synergy. The obtained 7 %NiFe-LDHs/g-C 3 N 4 owns the degradation rate of 99.23 % for tetracycline hydrochloride (TCH) in visible light. This work highlights a rational interface engineering strategy for the formation of a composite structure with interface interaction for efficient photocatalysts.