Rapid removal of tetracycline by g-C3N4/high elastic graphene sponge via synergy effect of adsorption and photocatalysis under visible light

Rapid pollutant removal technology has increasingly become one of the main components of environmental governance technology. Herein, porous g-C 3 N 4 /three-dimensional high elastic graphene sponge (CN/HEGS) composites were fabricated by introducing porous g-C 3 N 4 into three-dimensional highly elastic graphene sponge. The structure, morphology, light absorption ability and charge separation of the composite were characterized by a series of detection methods. The optimal CN/HEGS-90 presented high adsorption capacity and photocatalytic activity for tetracycline. The synergism of adsorption and photocatalysis is the main reason for the rapid degradation of the composites. The polymerization of amino compounds with epoxy bonds is the essence of the formation of three-dimensional interconnected porous sponge with high adsorption performance. The introduction of CN with visible light adsorption property and the composite structure formed between CN and HEGS promote efficient photogenerated charge transfer and transmission. This work provides an idea for the design and synthesis of composite catalysts with high efficiency and rapid pollutant degradation.