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Recently, Yuan Quan’s team at Wuhan University and Duan Xiangfeng’s team at the University of California at Los Angeles have developed an ultra-thin, high-strength film using graphene and other materials, which can efficiently separate salt ions and organic pollutants in water.
It is used in the fields of water purification, separation and purification of chemical raw materials.
The research team used the carbon nanotube film with excellent mechanical properties and porous structure as the mechanical support layer of the graphene film, thereby dividing the graphene film into multiple micro regions, forming a surface similar to a building "water cube", leaves or insect wings Structure.
This material, called "graphene nanosieve/carbon nanotube composite film", has a pore size of about 0.
6 nanometers, which is larger than the size of water molecules, but smaller than the size of some metal salt ions, so it can effectively remove water molecules and salt ions.
Separation, the retention rate of metal salt ions such as sodium, potassium and magnesium can reach more than 85%, and the retention rate of organic pollutant molecules in the aqueous solution is as high as 99%.
This kind of membrane has a high permeability.
A 1 square centimeter membrane can produce 1 ml of pure water per minute under a certain pressure, which is 10 to 100 times that of some traditional similar membranes.
Its mechanical properties are also very good, and it can still maintain structural integrity, water permeability and other characteristics under bending deformation.
It is used in the fields of water purification, separation and purification of chemical raw materials.
The research team used the carbon nanotube film with excellent mechanical properties and porous structure as the mechanical support layer of the graphene film, thereby dividing the graphene film into multiple micro regions, forming a surface similar to a building "water cube", leaves or insect wings Structure.
This material, called "graphene nanosieve/carbon nanotube composite film", has a pore size of about 0.
6 nanometers, which is larger than the size of water molecules, but smaller than the size of some metal salt ions, so it can effectively remove water molecules and salt ions.
Separation, the retention rate of metal salt ions such as sodium, potassium and magnesium can reach more than 85%, and the retention rate of organic pollutant molecules in the aqueous solution is as high as 99%.
This kind of membrane has a high permeability.
A 1 square centimeter membrane can produce 1 ml of pure water per minute under a certain pressure, which is 10 to 100 times that of some traditional similar membranes.
Its mechanical properties are also very good, and it can still maintain structural integrity, water permeability and other characteristics under bending deformation.
