Facile in situ synthesis of ZIF-67/cellulose hybrid membrane for activating peroxymonosulfate to degrade organic contaminants

In recent years, cobalt-based metal-organic frameworks (MOFs) have been used as catalytic materials to degrade organic contaminants in sulfate radical-based advanced oxidation processes (SR-AOPs). However, separating and recovering granular MOFs from the reaction system is difficult. Loading MOFs on the host material is currently the most effective way to promote their recyclability. Most reported aerogel materials are characterized by excessively long preparation and drying cycles. Considering this, herein, we report an in situ grown method to fabricate a ZIF-67/cellulose hybrid membrane, which was used as a catalyst for activating peroxymonosulfate to generate SO4-center dot and center dot OH, resulting in the contaminants degradation. The catalytic results showed that the hybrid membrane/PMS system could degrade the methylene blue and rhodamine B within 1 min. In addition, the separation and recovery problems were solved. The ZIF-67/cellulose hybrid membrane with outstanding degradation of contaminants expands the application of MOFs/cellulose hybrid materials for wastewater purification via SR-AOPs. [GRAPHICS] .

Automated summary

Cobalt-based metal-organic frameworks have been utilized for degrading organic contaminants, with challenges in separation and recovery; loading onto host materials enhances recyclability; the ZIF-67/cellulose hybrid membrane design resolves separation and recovery issues, demonstrating outstanding degradation and expanding applications in wastewater treatment.