Improving the performance of water desalination through ultra-permeable functionalized nanoporous graphene oxide membrane

Two-Dimensional Nanofluidic Membranes toward Harvesting Salinity Gradient Power

“…Further insight demonstrates that BNNTs have a surface charge up to 1 C m –2 , which is key for highly efficient ion transport and predicts an increase in SGP conversion as the length ( l ) of the nanofluidic channel is shortened . Some 2D nanosheet materials with nanopores have a short ion transport pathway down to the atomic scale and have become popular alternatives (Figure , I and III). − Owing to its mechanical properties and high diffusion rate, graphene also performs well in 2D pore-based SGP generators . Furthermore, precise and reproducible sub-2 nm pores in suspended graphene created using nanopore drilling techniques were fabricated and show great promise for batch of production of laboratory-scale nanopore power generator devices.…”

Carbon Nanopore-Tailored Reverse Osmotic Water Desalination

“…The water flux is also predicted to be several orders of magnitude higher than that of the existing RO membrane because of the extremely small thickness of the membrane. Other simulation attempts reported later provided a more comprehensive understanding of functionalized NPG membranes. , Besides the simulation results, such a single-layer NPG has been produced . The author grew single-layer graphene via chemical vapor deposition (CVD) on a copper foil with the boundary of size at 50 μm, and then the single-layer nondefect graphene was transferred to a silicon nitride substrate with a 2 μm hole for the desalination test.…”

Relationship of nitrates and nitrites in the water environment with humans and their activity

“…The one layer of carbon atoms in graphene nanostructure provides extreme thinness, mechanical strength, chemical stability, and inherent impermeability useful as a suitable two-dimensional separation nano-membrane (Celebi et al, 2014). Such application requires functionalization of graphene to achieve permeability, while holes for the transport of small molecules can be created (Hosseini et al, 2018;Shi et al, 2018). Then, nanopores, formed on the functionalized graphene sheet, can be used for nanofiltration of nitrates from contaminated water (Li et al, 2017;Anand et al, 2018).…”