Degradation of rhodamine B during visible light photocatalysis employing Ag@AgCl embedded on reduced graphene oxide

► Ag@AgCl/rGO, nano-silver, silver chloride on reduced graphene oxide catalyst. ► Plasmonic/semiconducting visible light photocatalsyt (Ag@AgCl/rGO) was prepared. ► Rhodamine B undergoes direct injection to Ag@AgCl/rGO to give deethylated products. ► Degradation products can be quantified using deconvolution of the UV-vis spectrum. ► Ag@AgCl/rGO forms a strong oxidant that is different to hydroxyl radical.