Efficient degradation of Rhodamine B by coupling of Lys-CoFe-layered double hydroxide@graphitic-C3N4 nanohybrids via photocatalysis under visible light.

• A facile co-precipitation method can be used to prepare graphitic-based composite photocatalyst. • The Co and Fe doping structures could enhance the separation efficiency and transfer of photogenerated carriers. • The coupling structure could enhance the chemical stability and photocatalytic activity. The photocatalyst Lys-FeCoLDH@g-C 3 N 4 nanohybrids were synthesized successfully by a facile in situ co-precipitation method. It is found that the layered nanosheet degradation efficiency of Rhodamine B reached 98.07% in 90 min under visible light irradiation by photocatalysis. In addition, photo-electrochemical measurements demonstrated that the structure of 5 %Lys-CoFe-LDH@g-C 3 N 4 could enhance the separation efficiency and transfer of photogenerated carriers. This study provides a new idea for the development of novel photocatalysts for the high-efficiency and active degradation of wastewater. [ABSTRACT FROM AUTHOR]