MXene molecular sieving membranes for highly efficient gas separation

By Li Ding, Yanying Wei, Libo Li, Zhang Tao, Haihui Wang, Jian Xue, Liang‐Xin Ding, Suqing Wang, J. Caro, Yury Gogotsi. Nature Communications, 2018

959 citations recorded by the source corpus.

Molecular sieving membranes with sufficient and uniform nanochannels that break the permeability-selectivity trade-off are desirable for energy-efficient gas separation, and the arising two-dimensional (2D) materials provide new routes for membrane development. However, for 2D lamellar membranes, disordered interlayer nanochannels for mass transport are usually formed between randomly stacked neighboring nanosheets, which is obstructive for highly efficient separation. Therefore, manufacturing lamellar membranes with highly ordered nanochannel structures for fast and precise molecular sieving is still challenging. Here, we report on lamellar stacked MXene membranes with aligned and regular subnanometer channels, taking advantage of the abundant surface-terminating groups on the MXene nanosheets, which exhibit excellent gas separation performance with H2 permeability >2200 Barrer and H2/CO2 selectivity >160, superior to the state-of-the-art membranes. The results of molecular dynamics simulations quantitatively support the experiments, confirming the subnanometer interlayer spacing between the neighboring MXene nanosheets as molecular sieving channels for gas separation. Two-dimensional materials show great potential for membrane technologies, but their disordered channels hinder their molecular sieving performance. Here, Wang, Gogotsi and colleagues design a MXene membrane with ordered nanochannels that exhibits an excellent H2/CO2 gas separation performance.

Subfields: Materials Chemistry, Mechanical Engineering

View Paper: https://www.semanticscholar.org/paper/a7ef20cbc039ddfaffaa5f0338811bbec13a3da9

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Materials Chemistry

1. W. Jin
2. Gongpin Liu
3. V. Mauchamp
4. S. Célérier
5. P. Chartier
6. Cyril Garnero
7. Michel W. Barsoum
8. Mathias Ulbricht

In Mechanical Engineering

1. Gongpin Liu
2. W. Jin
3. Michel W. Barsoum
4. Mathias Ulbricht
5. Yury Gogotsi
6. Hua Zhang

Citations in the corpus

• Thinking the future of membranes: Perspectives for advanced and new membrane materials and manufacturing processes (2020, background): “Insights from GO membranes might pave the way to a new family of high-performance separation membranes derived from other two-dimensional materials such as MXene [142,143], MoS 2 [144], as well as nanoporous metal-organic framework (MOF) [122] nanosheets.”