Two-dimensional MXene membranes with biomimetic sub-nanochannels for enhanced cation sieving
State Key Laboratory of Pollution Control and Resource Reuse · Nanjing University · +3 more institutions
Abstract
Abstract Membranes with high ion permeability and selectivity are of considerable interest for sustainable water treatment, resource extraction and energy storage. Herein, inspired by K + channel of streptomyces A (KcsA K + ), we have constructed cation sieving membranes using MXene nanosheets and Ethylenediaminetetraacetic acid (EDTA) molecules as building blocks. Numerous negatively charged oxygen atoms of EDTA molecules and 6.0 Å two-dimensional (2D) sub-nanochannel of MXene nanosheets enable biomimetic channel size, chemical groups and tunable charge density for the resulting membranes. The membranes show the capability to recognize monovalent/divalent cations, achieving excellent K + /Mg 2+ selectivity of…
Citation impact
- FWCI
- 17.19
- Percentile
- 100%
- References
- 57
Authors
5- RXRongming Xu
State Key Laboratory of Pollution Control and Resource Reuse, Nanjing University
- YKYuan Kang
Monash University
- WZWeiming Zhang
State Key Laboratory of Pollution Control and Resource Reuse, Nanjing University
- BPBingcai Pan
Nanjing Tech University, State Key Laboratory of Pollution Control and Resource Reuse, Nanjing University
- XZXiwang ZhangCorresponding
The University of Queensland
Topics & keywords
- Membrane
- Divalent
- Selectivity
- Molecule
- Hydration energy
- Ethylenediaminetetraacetic acid
- Ion
- Chemical engineering