Preparation and application for a thiol-functionalized magnetic oxygenous carbon nitride nanosheet

A preparation method for a thiol-functionalized magnetic oxygenous carbon nitride nanosheet, comprising the following steps:

• preparation of a magnetic carbon nitride oxide composite:
• S1, dispersing carbon nitride oxide ultrasonically to obtain a carbon nitride oxide suspension;
• S2, dissolving an iron source, and then adding the iron source to the carbon nitride oxide suspension to obtain a first mixed solution;
• wherein the iron source contains divalent iron and trivalent iron;
• and
• S3, after a hydrothermal reaction of the first mixed solution, adjusting a pH value of a reaction system to be alkaline, and then cooling, separating a sediment, washing, and drying to obtain the magnetic carbon nitride oxide composite;
• and
• preparation for the thiol-functionalized magnetic oxygenous carbon nitride nanosheet:
• S1, dispersing the magnetic carbon nitride oxide composite ultrasonically in a solvent, and then adding acid to adjust a pH to be acidic to obtain a second mixed solution;
• and
• S2, adding a thiol-rich modifier to the second mixed solution to modify the magnetic carbon nitride oxide composite to obtain a resulting solution;
• after modification, separating and washing the magnetic carbon nitride oxide composite from the resulting solution to obtain the thiol-functionalized magnetic oxygenous carbon nitride nanosheet.