Nano silver modified carbon nitride microsphere and preparation method thereof

The invention provides a preparation method of nano silver modified carbon nitride microsphere, and belongs to the technical field of composite photocatalytic materials. The preparation method comprises the following steps that cyanuric chloride, melamine, silver nitrate and acetonitrile are stirred and mixed, and mixed liquid is obtained; the mixed liquid is placed still to be subjected to a solvothermal reaction, and a solid product is obtained, wherein the solvothermal reaction temperature is 150-200 DEG C; the obtained solid product is heated to be the calcination temperature to be calcinated, the obtained calcinated product is sequentially cooled and ground, and the nano silver modified carbon nitride microsphere with the diamater being 0.5-2 microns is obtained. The preparation method provided by the invention is simple in technology and low in cost, the reaction process is easy to control, the nano silver modified carbon nitride microsphere obtained by adopting the method is spherical, the silver nano