A novel p-n heterojunction of Ag 2 O/Bi 4 Ti 3 O 12 nanosheet with exposed (0 0 1) facets for enhanced visible-light-driven photocatalytic activity

Abstract The Bi 4 Ti 3 O 12 nanosheet with highly exposed (0 0 1) facets was combined with Ag 2 O to form the p-n heterojunction photocatalyst, which showed distinctly increased visible light driven activity. The enhanced photocatalytic performance can be attributed to the synergetic effects of the internal electric field between Bi 4 Ti 3 O 12 nanosheets and the formation of p-n heterojuction between two semiconductors. This results may present a promising method to design new visible light photocatalysts for organic pollutant degradation.