Integrated adsorptive/reductive PEDOT:PSS-based composite membranes for efficient Ag(I) rejection

作者：Zuo, Qiuyang; Shi, Hui^*; Liu, Congcong; Peng, Mingming; Zhuang, Xu; Geng, Zhiwei; He, Shiweihua; Sheng, Xin; Shao, Penghui; Yang, Liming; Luo, Xubiao^*

来源：Journal of Membranes Science, 2023, 669: 121323.

DOI：10.1016/j.memsci.2022.121323

• Adsorptive
• reductive membrane
• Wastewater treatment
• PEDOT
• PSS
• Ag(I)

State-of-the-art polymeric membranes are faced with significant challenges of overcoming the permeability rejection trade-off. Herein, the conjugated polymer PEDOT:PSS based multilayered polymer membranes are rationally constructed for silver-containing wastewater treatment. It is noteworthy that Ag(I) ions with hydrated diameters approximately two-fold smaller than the pore size can still be completely rejected while maintaining preferable permeability, and the interception performance of PEDOT:PSS/PDA@PVDF composite membranes remains at 95% after three cycles. Encouragingly, the formation of metallic silver on the membrane is observed during ultrafiltration, where the S binding sites in the thiophene ring and the covalent O in the dioxane ring of PEDOT come into being a synergistic effect on the adsorption and reduction of Ag(I), benefiting for the enhanced rejection performance as well as desirable anti-fouling properties. The integrated adsorptive/reductive polymeric membrane exhibits exceptional potential as a suitable candidate for the next generation wastewater treatment and resource recovery.

• 单位
  南昌航空大学