Graphite-phase carbon nitride film and preparation method thereof

Belonging to the field of photoelectric and photoelectrochemical films and application, the invention provides a graphite-phase carbon nitride film and a preparation method thereof. The preparation method includes the steps of: taking a nitrogen-rich organic matter as the precursor, subjecting the precursor to heat preservation at 350-400DEG C for 1-6h for primary pyrolysis polymerization, and grinding the obtained product into a powdery sample; spreading the powdery sample in a heat-resistant carrier, placing a substrate material at an opening of the heat-resistant carrier, then placing the heat-resistant carrier at 500-600DEG C, carrying out heat preservation for 2-8h, and conducting evaporation deposition polymerization, and performing cooling to obtain a graphite-phase carbon nitride film on the surface of the substrate material. The graphite-phase carbon nitride film prepared by the method is more uniform, and has lower surface roughness and better light transmittance. The methodprovided by the invention