Preparation method of hydrogen production catalyst in carbon-hydrogen co-production

The invention belongs to the technical field of hydrogen production catalysts, and particularly discloses a preparation method of a hydrogen production catalyst in carbon-hydrogen coproduction, which comprises the following steps: synthesizing porous g-C3N4 by the following specific steps: firstly, adding 15g of melamine into 150ml of heated distilled water, slowly adding 15ml of 37% HCl into the solution after cooling, stirring for 30 minutes, and then adding the distilled water into the solution after stirring for 30 minutes; the preparation method comprises the following steps: firstly preparing a g-C3N4 solution, then putting the mixed solution into a drying oven at 80 DEG C for drying, putting 10g of melamine hydrochloride into a crucible with a cover, and calcining in a muffle furnace at 550 DEG C at a heating rate of 5 DEG C/min for 3 hours to obtain a porous g-C3N4 sample, namely p-CN; according to the preparation method disclosed by the invention, the CQDs are loaded on the C3N4 and are compounded wi