Abstract
Accurately constructing membranes based on two-dimensional (2D)
materials on commercial porous substrates remains a significant
challenge for H2 purification. In this work, a series of
tubular 2D MXene membranes are prepared on commercial porous stainless
steel substrates via fast electrophoretic deposition. Compared with
other methods, such as filtration or drop coating, etc. such preparation
route shows the advantages of simple operation, high efficiency for
membrane assembly (within 5 min) with attractive reproducibility, and
ease for scale-up. The tubular MXene membranes present excellent gas
separation performance with hydrogen permeance of 1290 GPU and
H2/CO2 selectivity of 55. Furthermore,
the membrane displays extremely stable performance during the long-term
test for more than 1250 h, and about 93% of the membranes from one
batch have exceeded the DOE target for CO2 capture. Most
importantly, this work provides a valuable referential significance for
other types of 2D materials-based membranes for future application
development.