Nanoscale cuprous thiocyanate, preparation method and application

The invention relates to the technical field of wastewater treatment materials, in particular to nanoscale cuprous thiocyanate as well as a preparation method and application thereof. The preparation method comprises the following steps: S1, stirring and dissolving copper sulfate in water, and uniformly stirring to obtain a blue transparent solution; s2, slowly dropwise adding a sodium thiosulfate solution into the blue transparent solution to obtain a green transparent solution; s3, slowly dropwise adding a sodium thiocyanate solution into the green transparent solution, and reacting to obtain a white precipitate; and S4, filtering and collecting the white precipitate, repeatedly cleaning with absolute ethyl alcohol and distilled water to remove sodium thiocyanate impurities on the surface of the white precipitate, and then drying and grinding to obtain the nanoscale cuprous thiocyanate. Compared with copper sulfide, the nano-scale cuprous thiocyanate prepared by the invention has the advantages of high stab