Ultrafast and selective gas transport through highly ordered black phosphorene nanochannels

Two-dimensional (2D) materials bring a great opportunity to fabricate molecular sieving membranes that can potentially break the permeability-selectivity trade-off. Although 2D laminar with interlayer nanochannels as channel were widely studied, for most of reported membranes, it is challenge highly ordered mass transport. Herein, we report novel kind black phosphorene membrane which made from stacking nanoflakes. The prepared shows H2 permeance > 1000 GPU and H2/CO2 selectivity 100 mixed gas, demonstrating an extremely high gas separation performance. DFT calculation results demonstrate galleries in allow passing through easily while block other gases bigger kinetic diameters, matching well experimental findings. present indicate be applied channels separation.