Preparation method and application of silver phosphate/tungsten trioxide core-shell nano photocatalytic composite material

The invention belongs to the technical field of photocatalysis, and relates to a preparation method and application of a silver phosphate/tungsten trioxide core-shell nano photocatalytic composite material. The preparation method comprises the following steps: adding a silver nitrate solution into a tungsten trioxide solution, and performing stirring in a dark place to obtain a solution C; dropwise adding a disodium hydrogen phosphate solution into the solution C, continuously performing stirring in a dark place, performing centrifuging, and performing drying in a vacuum state to obtain the silver phosphate/tungsten trioxide core-shell nano photocatalytic composite material which is used for degrading rhodamine B and ciprofloxacin under a visible light condition. Tungsten trioxide in the composite material completely wraps spherical silver phosphate particles, and the diameter of the tungsten trioxide ranges from 150 nm to 300 nm. Tungsten trioxide is in close contact with silver phosphate, so that the surfac