Aperture‐Adjustable and Repairable Metal‐Based MOFs Catalysis Membrane for Water Purification

Abstract

Precise adjustment of the pore size, damage repair, and efficient cleaning is all challenges for the wider application of inorganic membranes. This study reports a simple strategy of combining dry‐wet spinning and electrosynthesis to fabricate stainless‐steel metal–organic framework composite membranes characterized by customizable pore sizes, targeted reparability, and high catalytic activity for membrane cleaning. The membrane pore size can be precisely customized in the range of 14–212 nm at nanoscale, and damaged membranes can be repaired by targeted treatment in 120 s. In addition, advanced oxidation processes can be used to quickly clean the membrane and achieve 98% flux recovery. The synergistic actions of the membrane matrix and the selective layer increase the adsorption energy of active sites to oxidant, shorten the electron transfer cycle, and enhance the overall catalytic performance. This study can provide a new direction for the development of advanced membranes for water purification and high‐efficiency membrane cleaning methods.

From nano- to macroarchitectures: designing and constructing MOF-derived porous materials for persulfate-based advanced oxidation processes

“…200 Zhang and co-workers developed stainless-steel MOF composite membranes (SS-M) that can be efficiently cleaned by the generated radical and direct electron transfer pathway through PMS activation. 201…”

Aluminum-Based Heterogeneous Surface for Efficient Solar Desalination and Fog Harvesting Processed by a Picosecond Laser

“…Water is the source of life and the basis for human survival and development. Although the total amount of water on earth is large, freshwater resources only account for 2.5%, and the freshwater available for human use only accounts for 0.26% of the total water resources . In recent years, the shortage of freshwater resources has become increasingly prominent, and it is estimated that two-thirds of the world’s population will face the problem of water scarcity in 2025. , To solve this problem, many efforts have been made to obtain freshwater, such as membrane-based separations, electrodialysis processing, , crystallization treatment, fog harvesting, − and solar vaporization. , Among them, fog harvesting and solar vaporization, two types of low-cost and eco-friendly technologies, are promising to solve the problem of water scarcity.…”