Low-cost and efficient visible-light-driven CaMg(CO3)2@Ag2CO3 microspheres fabricated via an ion exchange route

Core-shell like CaMg(CO3)2@Ag2CO3 composite microspheres with low content of Ag2CO3 were prepared via a facile ion exchange route, the existence of CaMg(CO3)2cores could largely promote the separation of photogenerated electrons and holes, leading to high photocatalytic activity and stability.