4
R. Das
Fig. 3 a Illustration of 2D h-BN nanosheets, b h-BN film deposited onto a nylon membrane
support, c cross-section SEM image of a typical h-BN membrane and d mechanism of action for
solute separation. Figures b-d are reproduced with permission from Springer-Nature [13]
interests due to their chemical and thermal stabilities, low-cost material and excellent processibility. However, using these 2D TMDS for solutes separation is rarely
reported in the literature. Methods like chemical vapor deposition, mechanical exfoliation, and other chemical strategies are used for the large-scale synthesis of their
2D nanosheets. For example, a rolling-out method has been used to synthesize WS 2
nanosheets, having a 100 nm lateral dimension from 1D W 18 O 49 using surfactant
[15]. Ball milling and heating methods have also been used by mixing WO 3 and S
and heated the powders at 600 °C in Ar [16]. On the other hand, MoS 2 consists of two
types of atoms, that is, molybdenum (Mo) and sulfur (S). The thickness of monolayer MoS 2 is around 1.0 nm. Compared to steel, it is a strong material (Young’s
modulus: 270 ± 100 GPa). Because of its flexibility, both Mo and S are suitable
to create nanopore even with desired functionality. Figure 4 shows simulated MoS 2
membrane with nanoscale pore sizes which enhances water permeation and has good
solute retentions.
R. Das
Fig. 3 a Illustration of 2D h-BN nanosheets, b h-BN film deposited onto a nylon membrane
support, c cross-section SEM image of a typical h-BN membrane and d mechanism of action for
solute separation. Figures b-d are reproduced with permission from Springer-Nature [13]
interests due to their chemical and thermal stabilities, low-cost material and excellent processibility. However, using these 2D TMDS for solutes separation is rarely
reported in the literature. Methods like chemical vapor deposition, mechanical exfoliation, and other chemical strategies are used for the large-scale synthesis of their
2D nanosheets. For example, a rolling-out method has been used to synthesize WS 2
nanosheets, having a 100 nm lateral dimension from 1D W 18 O 49 using surfactant
[15]. Ball milling and heating methods have also been used by mixing WO 3 and S
and heated the powders at 600 °C in Ar [16]. On the other hand, MoS 2 consists of two
types of atoms, that is, molybdenum (Mo) and sulfur (S). The thickness of monolayer MoS 2 is around 1.0 nm. Compared to steel, it is a strong material (Young’s
modulus: 270 ± 100 GPa). Because of its flexibility, both Mo and S are suitable
to create nanopore even with desired functionality. Figure 4 shows simulated MoS 2
membrane with nanoscale pore sizes which enhances water permeation and has good
solute retentions.