Micromembrane absorber with deep‐permeation nanostructure assembled by flowing synthesis

Abstract

A micromembrane adsorber with deep‐permeation nanostructure (DPNS) has been successfully fabricated by flowing synthesis. The nanoparticles are in‐situ assembled in membrane pores and immobilized in each membrane pore along the direction of membrane thickness. The nanoparticles with a lower size and thinner size distribution can be achieved owing to the confined space effect of the membrane pores. As a concept‐of‐proof, the nano ZIF‐8 and ZIF‐67 are fabricated in porous membrane pores for methyl orange (MO) and rhodamine B (RhB) adsorption. The adsorption rate is increased significantly owing to the enhanced contact and mass transfer in the confined space. The adsorption capacity for the RhB is also increased, since the size of the nanoparticles assembled in membrane pores is smaller with more active sites exposed. This micromembrane adsorber with DPNS has good reusability and can provide a promising prospect for industrial application.

Catalytic membrane nano reactor with Cu/ZnO in situ immobilized in membrane pores for methanol dehydrogenation

“…In our previous study, it has been found that the catalytic nanoparticles can be in situ immobilized in membrane pores by flowing synthesis [16][17][18][19][20] . During this process, the precursor fluid for nanoparticles formation can permeate through the membrane pores under the external driven force.…”

Self-Supporting Electrode Fabricated by Flowing Synthesis for Efficient Hydrogen Evolution Reaction

“…Flowing synthesis is an effective method to immobilize a nanoatalyst into the pores of a porous substrate. − Instead of by diffusion of the precursor liquid into the porous substrate pores under the condition of a porous substrate immersed into a precursor liquid, the precursor liquid can flow into the pores by the action of external force under the condition of flowing synthesis. In this case, each pore of the porous substrate can be filled with the precursor liquid, and the nanocatalyst can be firmly immobilized in the pores of the porous substrate due to the van der Waals force and inertia force.…”

MOF‐801 polycrystalline membrane with sub‐10 nm polymeric assembly layer for ion sieving and flow battery storage

“…However, traditional polymeric membranes used in the energy related techniques have to suffer from an insurmountable paradox between ion selectivity and conductivity, usually called the trade‐off effect 6 . To alleviate this limitation, porous membranes whose nanopores act as the sieving role exhibit grand potential as ion selective membranes 7–9 . Up to now, various studies on porous membranes, including membrane microstructure design, 10,11 membrane property modification 12,13 and membrane material synthesis, 14 have been carried out, particularly for the vanadium flow battery (VFB) system.…”

“…6 To alleviate this limitation, porous membranes whose nanopores act as the sieving role exhibit grand potential as ion selective membranes. [7][8][9] Up to now, various studies on porous membranes, including membrane microstructure design, 10,11 membrane property modification 12,13 and membrane material synthesis, 14 have been carried out, particularly for the vanadium flow battery (VFB) system. Notably, porous membranes consisted of molecular sieving materials such as zeolites and metal-organic frameworks (MOFs) present intrinsic merits compared with porous polymeric membranes, involving regular pore structure and modifiable channels.…”