Preparation of ZIF-8 membranes supported on ceramic hollow fibers from a concentrated synthesis gel

Highly hydrogen permselective ZIF-8 membranes supported on polydopamine functionalized macroporous stainless-steel-nets

“…In the last ve years, more and more effort has been paid to the preparation of ZIF-8 membranes by in situ growth, secondary growth, and also the liquid phase epitaxy method. [16][17][18][19][20][21][22][23][24][25]33 However, it was oen found that separate ZIF-8 crystals or islands rather than continuous layers were formed on the native ceramic supports by direct solvothermal synthetic routes because heterogeneous nucleation of ZIF-8 crystals on the support surfaces was very poor. 17,26 Therefore, seed coating 20,21 or chemical modication 17,26 of the supports have been applied to promote the heterogeneous nucleation of ZIF-8 crystals on support surfaces.…”

On the zeolitic imidazolate framework-8 (ZIF-8) membrane for hydrogen separation from simulated biomass-derived syngas

“…5 processes in industry [42]. Although the pore size of ZIF-8 is slightly larger than the kinetic diameter of CO 2 , ZIF-8 membranes were expected to separate H 2 /CO 2 mixtures through the recognition of their size difference [43].…”

“…Although the pore size of ZIF-8 is slightly larger than the kinetic diameter of CO 2 , ZIF-8 membranes were expected to separate H 2 /CO 2 mixtures through the recognition of their size difference [43]. However, modest H 2 /CO 2 separation performance has been reported [24,26,42,44], requiring a substantial work on understanding the structural properties of ZIF-8 membranes and thus, improving their separation performances. There are two primary classifications of the synthesis methods; in situ growth [26,34] and secondary growth [25,33,35].…”

Zeolitic imidazolate framework membranes for gas separation: A review of synthesis methods and gas separation performance

“…[24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41], titania [23,42], YSC [43], ZnO [44], and SiO 2 [45]. Titania is 173 a substrate that promotes heterogeneous nucleation; however, it is 174 too expensive and brittle [25].…”