Graphene oxide-modified g-C3N4 nanosheet membranes for efficient hydrogen purification

Review of 2D Graphitic Carbon Nitride-Based Membranes: Principles, Syntheses, and Applications

“…It is hard to fabricate high-quality g-C 3 N 4 membranes, and the separation performance is unsatisfactory for the requirements of industrial production. Experimentally, to retain the structural integrity of the g-C 3 N 4 plane, GO was used to cover and remedy some interedge defects or voids in g-C 3 N 4 membranes for H 2 purification. , The obtained g-C 3 N 4 /GO membrane exhibited excellent H 2 permeation performance (H 2 permeance = 2.16 × 10 –7 mol m –2 s –1 Pa –1 ; H 2 /CO 2 selectivity = 39.2) and good stability, which are promising for practical H 2 separation processes (Figure a,b) …”

“…(c) Schematic of g-C 3 N 4 /Pebax membranes with different thicknesses and morphologies and the corresponding gas transport pathways through the composite membranes. Reproduced with permission from (a, b) ref and (c) ref . Copyright 2021 and 2020, respectively, Elsevier.…”

Metal oxyhydroxide nanosheet-assisted fabrication of ultrathin carbon molecular sieve membrane for hydrogen separation

“…Meeting the third criterion is especially challenging because the commonly used nanosheets that are stable during the high-temperature carbonization of polymers, such as graphene oxide, boron nitride and MXene, are gas impermeable. [29][30][31][32][33] Metal oxyhydroxide (MOOH) nanosheets are a class of atomically thin 2D materials and are widely studied in electrocatalysis. [34][35][36][37][38] The as-synthesized MOOH nanosheets normally have lateral sizes of a few micrometers and thicknesses of about 1 nm.…”

“…Meeting the third criterion is especially challenging because the commonly used nanosheets that are stable during the high-temperature carbonization of polymers, such as graphene oxide, boron nitride and MXene, are gas impermeable. 29–33…”

Facile Ionization of the Nanochannels of Lamellar Membranes for Stable Ionic Liquid Immobilization and Efficient CO2Separation

“…It severely restricts their practical development and application. To overcome this deficiency, numerous efforts have been devoted to preventing the weight loss of ILs. , Different from the vertical pores of conventional SILMs, intercalating ILs into horizontally arrayed nanochannels of 2D lamellar membranes is expected to largely retard the pressure-driven flow of ILs and reduce the weight loss. , On the other hand, the intercalation of ILs can in turn overcome the common defects of lamellar membranes and effectively improve the chemical microenvironment of nanochannels. That is, the intercalation of ILs can simultaneously resolve the problems of both lamellar membranes and SILMs.…”