Abstract
AbstractThe emergence of MOF–based separation membranes has transformed liquid contaminant filtration with impressive sieving properties. However, their use in multiphase water filtration is hindered by a limited sieving range and susceptibility to collapse in solution. To address this challenge, an innovative solution is presented: the Multilevel Cellular Graphene Skeleton (MCGK) induced by femtosecond laser, onto which a continuous MOF nanolayer (CMN), specifically ZIF–8, is grown. This forms a groundbreaking multistage micron/nanocomposite pore membrane. The MCGK/CMN membrane significantly expands the range of filterable contaminants and enhances stability. It utilizes a multilevel, multi–pore size sieving strategy for effective multiphase water filtration, achieving an impressive 90% efficiency in self–driven solar steam generation sieving. Additionally, it excels in removing organic pollutants and over 80% of volatile organic compounds (VOCs), while reducing metal ion concentrations. In liquid pressure–driven filtration, it achieves complete oil adsorption and reduces VOCs and metal ion concentrations. This innovative multistage micron/nanocomposite pore membrane holds great potential for diverse practical applications and provides insights for next–generation nanofiltration membranes, promising more efficient and resilient water purification technologies in the future.
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