▎ 摘　　要

The surface modification of polyacrylonitrile (PAN) ultrafiltration membranes with advanced porous framework materials is suggested as a directional design of membrane apertures and capabilities to improve their permselectivity and antifouling/antibacterial performance. In this work, a 2D metal-organic framework, HKUST-1, and reduced graphene oxide (rGO) were used to modify a PAN membrane and prepare a novel composite membrane named HKUST-1/rGO/PAN for dye wastewater treatment. X-ray photoelectron spectroscopy, scanning electron microscopy, atomic force microscopy and energy dispersive X-ray spectrometer analyses were used to evaluate the structure and chemical composition of the as-obtained membranes. HKUST-1/rGO/PAN exhibited a pure water flux of 58.46 L m(-2) h(-1) bar(-1), which was 2.8 times higher than that of an rGO/PAN membrane. The membrane rejection for Methylene blue was more than 90% after 2 h of continuous operation. The composite membrane also exhibited excellent antifouling and antibacterial properties. The removal ratio greatly improved in the antifouling experiment after 3 rounds of sequential fouling and washing, and the inhibition rate against Escherichia coli and Staphylococcus aureus reached 100%. This work offers a simple technology for exploiting novel multifunctional composite membranes with long-term operational stability and strong antibacterial properties for water treatment.