Micro membrane absorber with deep-permeation nano structure assembled by
flowing synthesis
Abstract
A micro membrane adsorber with deep-permeation nano structure (DPNS) has
been successfully fabricated by flowing synthesis. The nanoparticles are
in situ assembled in membrane pores and immobilized in each membrane
pores 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 micro membrane
adsorber with DPNS has good reusability, and can provide a promising
prospect for industrial application.