Preparation method of carbon nitride electrode material

A preparation method of a carbon nitride electrode material, characterized by comprising the following steps:

• (1) Preparing a precursor film:
• vertically immersing a clean conductive substrate A into a saturated CN precursor aqueous solution, then immediately taking out the conductive substrate A, forming a uniform precursor film layer on the conductive substrate A;
• after the surface has been dried, adjusting the thickness of the precursor film layer by repeating the above steps of dipping and drying cycles for many times to form multiple layers, and air-drying or drying the obtained precursor film in a 60° C. drying oven for later use;
• (2) Preparing the CN electrode:
• putting the dry precursor film obtained in step (1) into a glass tube, introducing nitrogen gas to discharge air in the glass tube, binding the glass tube opening with tin foil paper, then putting the glass tube into a furnace with N2 atmosphere to calcinate at a temperature, and cooling to obtain the uniform CN film electrode.