Hydrogen fuel has been embraced as a potential long-term solution to the growing demand for clean energy. A membrane-assisted separation is promising in producing high-purity H₂. Molecular sieving membranes (MSMs) are endowed with high gas selectivity and permeability because their well-defined micropores can facilitate molecular exclusion, diffusion, and adsorption. In this work, MXene nanosheets intercalated with Ni²⁺ were assembled to form an MSM supported on Al₂O₃ hollow fiber via a vacuum-assisted filtration and drying process. The prepared membranes showed excellent H₂/CO₂ mixture separation performance at room temperature. Separation factor reached 615 with a hydrogen permeance of 8.35 × 10⁻⁸ mol·m⁻²×s⁻¹×Pa⁻¹. Compared with the original Ti₃C₂T_x/Al₂O₃ hollow fiber membranes, the permeation of hydrogen through the Ni²⁺-Ti₃C₂T_x/Al₂O₃ membrane was considerably increased, stemming from the strong interaction between the negatively charged MXene nanosheets and Ni²⁺. The interlayer spacing of MSMs was tuned by Ni²⁺. During 200-hour testing, the resultant membrane maintained an excellent gas separation without any substantial performance decline. Our results indicate that the Ni²⁺ tailored Ti₃C₂T_x/Al₂O₃ hollow fiber membranes can inspire promising industrial applications.

氢燃料已被视为对清洁能源不断增长的需求的潜在长期解决方案。膜辅助分离有望产生高纯度的H ₂。分子筛膜（MSMs）具有很高的气体选择性和渗透性，因为它们明确的微孔可以促进分子的排斥，扩散和吸附。在这项工作中，通过真空辅助过滤和干燥过程，组装了嵌入Ni ^2+的MXene纳米片，以形成负载在Al ₂ O ₃中空纤维上的MSM 。制备的膜显示出优异的H ₂ / CO _2。室温下混合物的分离性能。氢渗透率为8.35×10 ^-8 mol·m ^-2 ×s ^-1 ×Pa ^-1时，分离系数达到615 。与原来的Ti相比₃ c ^ ₂ Ť _X / Al的_2层ö ₃的中空纤维膜，氢的通过将Ni渗透²⁺ -Ti ₃ c ^ ₂ Ť _X / Al的₂ ö ₃膜显着增加，从强相互作用而产生带负电的MXene纳米片和Ni ^2+之间。MSMs的层间距由Ni ²⁺调节。在200小时的测试过程中，所得膜保持了出色的气体分离，而性能没有任何实质性下降。我们的结果表明，Ni ²⁺定制的Ti ₃ C ₂ T _x / Al ₂ O ₃中空纤维膜可以激发有前途的工业应用。