Synergistic Multilevel Sieving Membranes: Integrating Cellular Graphene Skeleton with Continuous MOFs Nanolayer for Superior Multiphase Water Separation

The 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. Pulsed laser-induced chemical solid-phase deposition (LCSD) forms an exceptional Pt-Ni/LDH catalyst, excelling in the hydrogen evolution reaction. This study highlights the importance of high-density atomic metal layers on 2D materials in catalytic device development. The synergy of LDH and Pt-metal enhances catalytic performance, offering exciting advancements in materials science through LCSD for stable nanocomposites designed for electrocatalytic applications.image

Automated summary

Researchers have developed a multistage micron/nanocomposite pore membrane using femtosecond laser induction, which significantly expands the range of filterable contaminants and enhances stability. This membrane demonstrates high efficiency in multiphase water filtration and liquid pressure-driven filtration, offering promising advancements in water purification technologies.