▎ 摘　　要

NOVELTY - Deionizing solution involves: functionalizing apertures of graphene sheet (212) to repel first ions in solution (201) from transit via apertures, which influences second ions in solution to not transit via apertures; positioning graphene sheet between solution flow path input and output; and causing solution to enter solution flow path input and via functionalized apertures to result in deionized solution (202) on solution flow path output side (227) of graphene sheet and second solution containing first ions and second ions on solution flow path input side (226) of graphene sheet. USE - For deionization of ion-laden solution (claimed) such as for deionization of ion-laden water that is seawater or brackish water. ADVANTAGE - The method for deionizing solution, particularly for desalinizing water, uses functionalized graphene sheet and provides improved method over prior art reverse osmosis (RO) method. The functionalized graphene sheet e.g. graphene sheet having apertures functionalized with negative charge, such as oxygen will repel chlorine ions, which are negatively charged, which will cause chlorine ions to transit apertures at greatly reduced rate or not at all. Sodium ions, which are positively charged, will be influenced to stay within chamber with repelled chlorine ions. Although substantial concentration of chlorine and sodium ions will be repelled (either directly or indirectly) by functionalization and charge of graphene sheet, it is possible that some chlorine, sodium, or other ions may nevertheless transit apertures. If this occurs, downstream perforated graphene sheet is perforated with apertures, and in addition to having positively functionalized apertures, is positively charged. This positive charge repels transit of sodium ions through graphene sheet, and also indirectly repels transit of any chlorine ions that may have made it to intermediate chamber. Ions other than chlorine and sodium may be removed from water by selective functionalization of apertures on graphene sheet(s). DETAILED DESCRIPTION - Method for deionization of solution, involves: functionalizing several apertures of graphene sheet (212) to repel first ions in solution (201) from transit through functionalized several apertures, where non-transiting first ions influence second ions in solution to not transit through functionalized several apertures; positioning graphene sheet in between solution flow path input and solution flow path output; and causing solution to enter solution flow path input and through functionalized several apertures of graphene sheet, to result in deionized solution (202) on solution flow path output side (227) of graphene sheet and second solution containing first ions and second ions on solution flow path input side (226) of graphene sheet. The first ions are negatively charged ions; second ions are positively charged ions; and functionalizing several apertures involves functionalizing perimeters of several apertures to have negative charge to repel negatively charged ions in solution; by using oxygen, nitrogen, phosphorus, sulfur, fluorine, chlorine, bromine, or iodine, or by using polymer chains or amino acid chains having overall negative charge. Alternatively, first ions are positively charged ions; second ions are negatively charged ions; and functionalizing several apertures involves functionalizing perimeters of several apertures to have positive charge to repel positively charged ions in solution; by using boron, hydrogen, lithium, magnesium, or aluminum, or by using polymer chains or amino acid chains having overall positive charge. The method further involves dimensioning several apertures of graphene sheet to repel transit of first ions, and applying electrical charge to graphene sheet, where electrical charge repels first ions. The method further involves functionalizing first several apertures of first graphene sheet to repel first ions in solution from transit through functionalized first several apertures, where non-transiting first ions also influence second ions in solution to not transit through functionalized first several apertures; functionalizing second several apertures of second graphene sheet to repel second ions in solution from transit through functionalized second several apertures, where non-transiting second ions also influence first ions in solution to not transit through functionalized second several apertures; positioning first graphene sheet downstream of solution flow path input and positioning second graphene sheet between first graphene sheet and solution flow path output; and causing solution to enter solution flow path input, through first graphene sheet, then through second graphene sheet, to result in deionized solution at solution flow path output. The first ions are negatively charged ions and second ions are positively charged ions; or first ions are positively charged ions second ions are negatively charged ions. An INDEPENDENT CLAIM is included for deionizer comprising: graphene sheet with several apertures functionalized to repel first ions in solution from transit through several apertures, where non-transiting first ions influence second ions in solution to not transit through functionalized several apertures; solution flow path with input and output, where graphene sheet is positioned between solution flow path input and solution flow path output; and source of solution laden with ions; where solution laden with ions is introduced into solution flow path input, passes through graphene sheet, to result in first ion solution containing first ions and second ions on solution flow path input side of graphene sheet and deionized solution on solution flow path output side of graphene sheet. DESCRIPTION OF DRAWING(S) - The figure shows notional representation of water filter comprising perforated graphene sheet. Water carrying unwanted ions (201) Deionized water (202) Channel to convey ion-laden water filter membrane (210) Perforated graphene filter membrane (212) Supporting chamber (214) Backing sheet (220) Channel/output to solution flow path (222) Capture vessel/tank (224) Upstream side/input side of graphene-sheet-supporting chamber containing ions (226) Downstream portion/output side of graphene-sheet-supporting chamber having deionized water (227)