Abal João P K, Barbosa Marcia C
Institute of Physics, Federal University of Rio Grande do Sul, 91501-970, Porto Alegre, Brazil.
Phys Chem Chem Phys. 2021 Jun 2;23(21):12075-12081. doi: 10.1039/d1cp00613d.
Use of nanoscale materials is a promising desalination technology. While fast water flow in nanotubes is well understood, this is not the case for water permeability in single-layer membranes. The advances in nanofluidics have opened up the possibility to shift the permeability-selectivity tradeoff. The physical-chemical balance between nanopore size, shape, and charge might be the answer. In this work, we investigate the role of the MoS2 nanopore charge distribution in water mobility by tuning its strength. We shed light on the competition between charge and nanopore size. The strong dipole interaction between water and the MoS2 nanopore is responsible for adding a constraint to the water angular orientation possibilities to travel through the nanopore, but this effect also depends on the nanopore size.
使用纳米级材料是一种很有前景的海水淡化技术。虽然纳米管中的快速水流已得到充分理解，但单层膜的水渗透性情况并非如此。纳米流体学的进展为改变渗透率 - 选择性权衡开辟了可能性。纳米孔尺寸、形状和电荷之间的物理化学平衡可能是答案。在这项工作中，我们通过调节其强度来研究二硫化钼纳米孔电荷分布在水迁移中的作用。我们揭示了电荷与纳米孔尺寸之间的竞争关系。水与二硫化钼纳米孔之间强烈的偶极相互作用对水通过纳米孔时的角取向可能性增加了限制，但这种效应也取决于纳米孔的尺寸。
