▎ 摘　　要

Graphene oxide (GO)-based membranes have previously demonstrated great gaseous molecular separation potential. However, defect-free GO-based laminar membrane presents major challenge given the difficulty to deposit configured GO film onto the porous ceramic support. This work reports single-step synthesis of a molecular sieving GO membrane film on top of silicalite-1 (Sil-1)-modified alumina (Al2O3) (Sil-1-Al2O3) hollow fiber. The critical Sil-1 content in the support is 2 wt%, above which there is marginal improvement of the interfacial adhesion, d-spacing, and hydrogen permeance. Binary gas permeation experiments on GO/2 wt% Sil-1-Al2O3 membrane revealed parallel increase of H-2 and N-2 permeance with temperature rise and decrease in H-2 selectivity at higher temperatures. The operational stability of the composite membrane was demonstrated by stable H-2 permeance (1.22.10(-7) mol m(-2) S-1 Pa-1) and selectivity (40.7) over 240-h operation at 20 degrees C, and maintained consistently following 210-h operation at 100 degrees C. Modeling study revealed major driving force contribution near the fiber inlet to increase the overall membrane H-2 permeance.