Preparation method of Cu5FeS4/Ni3S2@NF composite material and application of Cu5FeS4/Ni3S2@NF composite material in photoelectric hydrolysis

The invention belongs to the technical field of composite materials, and relates to a photoelectric catalyst, in particular to a preparation method of a Cu5FeS4/Ni3S2@NF composite material. The preparation method comprises the following steps of: dissolving Cu(acac)2 and Fe(acac)3 powder in n-dodecanethiol (C12H12S6), and performing uniform stirring under the protection of nitrogen to remove air in a system; adding pretreated foamed nickel, heating an obtained mixture to 120-140 DEG C under the protection of nitrogen, keeping the temperature for 20-40 minutes, heating to 230-250 DEG C, reacting for 20-40 minutes, and naturally cooling an obtained substance to room temperature; and finally, washing the substance with normal hexane and acetone for three times, and performing drying to obtain the composite material. The invention also discloses application of the prepared composite material as a catalyst in photoelectric water decomposition. The Cu5FeS4/Ni3S2@NF heterojunction composite material is successfully