Polydopamine/UiO-66-NH2 induced photothermal antibacterial electrospun membrane for efficient point-of-use drinking water treatment

A miniaturized point-of-use (POU) water treatment device to achieve convenient and efficient water disinfection for remote and post-disaster areas remains a challenge. Herein, such as POU device consisted of a self-polymerized polydopamine (PDA) layer and UiO-66-NH 2 nanoparticles covered electrospun polyacrylonitrile (PAN) membrane (PAN@PDA@UiO-66-NH 2 ) with bacteria filtration and photothermal antibacterial property is successfully fabricated. The membrane achieves a good interception effect of microorganisms in water because of the synergistic pore interception and adsorption effect. A nearly 100% bacterial retention efficiency was obtained by the PAN@PDA@UiO-66-NH 2 membrane. In addition, the obtained PAN@PDA@UiO-66-NH 2 membrane exhibits nearly 100% photothermal sterilization efficiency against Escherichia coli ( E. coli ) under 6 min of 808 nm infrared irradiation (1.21 W). The great photothermal effect comes from the synergistic effect of good photothermal conversion efficiency and absorption of incident light caused by the PDA layer and rough UiO-66-NH 2 particles, respectively. Through the good filtration performance and photothermal effect of the membrane, the filtration for water containing bacteria and sterilization of membrane can be realized. Meanwhile, the membrane fouling caused by bacterial growth can be inhibited. In this way, this innovative membrane has the ability to maintain great filtration and sterilization ability during long-term operation, and thus, having great potential to be used as an effective, convenient, practical, and safe POU water-treatment device.