In situ reversible assembly of atomic interfacial structure in BiOI/Bi5O7I p-n heterojunctions to promote visible-light photocatalysis

An in situ reversible assembly strategy is demonstrated for the fabrication of p-n heterojunctions in BiOI/Bi5O7I composites. This approach allows for the generation of ample interfacial interactions and built-in electric field, resulting in a strong driving force for effective charge separation. These advantages drastically enhance the photocatalytic activity of BiOI/Bi5O7I composites towards efficient CO2 reduction and pollutants degradation using visible light.