Cobalt phosphide-phosphorus loaded boron-doped carbon nitride photocatalyst as well as preparation method and application thereof

The invention discloses a photocatalyst with cobalt phosphide and phosphorus simultaneously loaded on boron-doped carbon nitride. The main components of the catalyst are boron-doped carbon nitride, cobalt phosphide nanoparticles and red phosphorus. The main preparation process of the material comprises the following steps: 1) mixing urea and boric acid, and performing pyrolysis to synthesize boron-doped carbon nitride; 2) mixing the boron-doped carbon nitride with a cobalt nitrate solution, heating and stirring, and then heating in a tubular furnace to obtain a material precursor; and 3) mixing the precursor with sodium hypophosphite monohydrate, heating in a tubular furnace, washing and drying to obtain the cobalt phosphide-phosphorus loaded boron-doped carbon nitride. The catalyst has high performance of photocatalytic water decomposition hydrogen production without additional reagents. The photocatalyst disclosed by the invention is high in water photolysis activity, does not need to additionally add an el