Porous graphene coating by solid phase reaction and its virucidal application

Abstract

For a wider range of applications of porous graphene, including the functionalization of the surface of daily items, its direct coating onto the surface is highly demanded. Here, we demonstrated porous graphene coating by simple vacuum annealing of Co–C based films on SiO2/Si substrates at 800 °C. The porous graphene films thus prepared featured a dense distribution of core-shell structures consisting of an empty core surrounded by a multilayer graphene shell (hollow graphene shell), together with dispersed Co nanoparticles. Adding a tiny amount of Ag (