▎ 摘　　要

NOVELTY - Preparing porous carbon nitride photocatalyst containing nitrogen vacancy and few layers, comprises (i) dispersing graphene oxide in small molecular alcohol, ultrasonically treating to form oxidized graphite alcohol dispersion, (ii) dissolving the graphite-phase carbon nitride precursor in small molecular alcohol, stirring uniformly to form graphite-phase carbon nitride precursor alcohol solution, (iii) uniformly mixing oxidized graphite alcohol dispersion with graphite-phase carbon nitride precursor alcohol solution using graphene oxide as sacrificial template, (iv) sending the liquid obtained in step (iii) into a rotary steam drying device to remove small molecular alcohol, (v) sending the sample obtained in step (iv) into an oven and drying, and (vi) adding the obtained product in step (v) in a muffle furnace, and heating to 540-560 degrees C at a rate of 3-10 degrees C/minute, and maintaining the temperature for 4-10 hours to obtain final product. USE - The photocatalyst is useful in hydrogen production by photocatalytic methanol aqueous reforming (claimed).