Amphiphilically Modified Porous Polymeric Nanosandwich‐Based Membranes for Rapid and Efficient Water Treatment

Abstract Low removal efficiency, long treatment time, and high energy consumption hinder advanced and eco‐friendly use of traditional adsorbents and separation membranes. Here, a class of amphiphilically modified 2D porous polymeric nanosandwich is designed and is subsequently assembled into adsorptive membranes. The 2D nanosandwich is gifted with high porosity and excellent pore accessibility, demonstrating rapid adsorption kinetics. The as‐assembled membrane integrates unimpeded interlayer channels and well‐developed, amphiphilic, and highly accessible intralayer nanopores, leading to ultrafast water permeation (1.2 × 10⁴ L m⁻² h⁻¹ bar⁻¹), high removal efficiency, and easy regeneration. The family of the membrane can be expanded by changing amphiphilic functional groups, further providing treatment of a wide‐spectrum of pollutants, including aromatic compounds, pesticide, and pharmaceuticals. It is believed that the novel amphiphilically modified adsorptive membrane offers a distinct water treatment strategy with ultrahigh water permeation and efficient pollutants removal performances, and provides a multiple‐in‐one solution to the detection and elimination of pollutants.