Carbon-based silver sulfide composite aerogel with synergistically enhanced light capture and biofouling resistance as well as preparation method and application of carbon-based silver sulfide composite aerogel

The invention relates to the technical field of nano composite materials, in particular to a carbon-based silver sulfide composite aerogel with synergistically enhanced light capture and biofouling resistance and a preparation method and application of the carbon-based silver sulfide composite aerogel with synergistically enhanced light capture and biofouling resistance. The preparation method comprises the following steps: preparing chitosan-graphene aerogel with different orientation structures, carbonizing the chitosan-graphene aerogel in an N2 atmosphere to obtain carbon-based aerogel with different structures, soaking the carbon-based aerogel in a tannic acid-Tris solution to adsorb tannic acid molecules, washing the carbon-based aerogel with deionized water, and soaking the carbon-based aerogel in a silver nitrate solution to form a tannic acid-silver ion complex; and washing with deionized water, and soaking in a thioacetamide solution to obtain the carbon-based silver sulfide composite aerogel with di