Copper porphyrin MOF/graphene oxide composite membrane with high efficiency electrocatalysis and structural stability for wastewater treatment

In order to achieve effective separation and rapid degradation of toxic dyes, copper porphyrin/graphene oxide (Cu-TCPP/GO) composite membranes with structural stability were prepared. In this process, Cu-TCPP MOF was successfully synthesized by hydroxyl double salt active intermediates, which grow along the GO surface in different directions (the main direction is perpendicular to the GO base layer). The results showed that the CM3 composite membranes (GO-MOF: CNT = 2.5 : 1, wt%, PES substrate membrane) exhibited good membrane properties (permeation flux reached 26.24 L·m−2·h−1·bar−1, with over 99 % rejection of Congo red) and excellent conductivity with RCM3 of 3.73 kΩ·sq−1. Consequently, highly effective and rapid degradation of organic dyes was accomplished, e.g., 99.5 % of the Congo red was degraded in 10 min, and 94.8 % for methylene blue in 30 min, indicating a harmless treatment of dye wastewater. Furthermore, the composite membrane has maintained excellent stability and degradation ability in multiple cycle tests. The GO-MOF composite membrane provides a treatment method and design reference for clean water resources and environmental protection.