A radical polymer membrane for simultaneous degradation of organic pollutants and water filtration

• 成果类型: Article
• 署名作者: Li, Feng; Mi, Yixin; Chen, Ronn Zhi Ning; Liu, Wei; Wu, Ji; Hou, Deyin; Yang, Min; Zhang, Sui
• 署名单位: National University of Singapore; Chinese Academy of Sciences; National University of Singapore; Southeast University - China; Purple Mountain Laboratories
• 刊物名称: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
• ISSN/ISSBN: 0027-12626
• DOI: 10.1073/pnas.2315688121
• 发表日期: 2024-02-13
• 关键词: persistent free-radicals; pharmaceutical compounds; hydrogen-peroxide; contaminants; oxygen; activation; frameworks; uv

摘要

Integrating reactive radicals into membranes that resemble biological membranes has always been a pursuit for simultaneous organics degradation and water filtration. In this research, we discovered that a radical polymer (RP) that can directly trigger the oxidative degradation of sulfamethozaxole (SMX). Mechanistic studies by experiment and density functional theory simulations revealed that peroxyl radicals are the reactive species, and the radicals could be regenerated in the presence of O-2. Furthermore, an interpenetrating RP network membrane consisting of polyvinyl alcohol and the RP was fabricated to demonstrate the simultaneous filtration of large molecules in the model wastewater stream and the degradation of similar to 85% of SMX with a steady permeation flux. This study offers valuable insights into the mechanism of RP- triggered advanced oxidation processes and provides an energy- efficient solution for the degradation of organic compounds and water filtration in wastewater treatment.