Marked enhancement of photocatalytic activity and photochemical stability of N-doped TiO2 nanocrystals by Fe3+/Fe2+ surface modification

High photocatalytic activity and reusability are two major factors that should be considered for photocatalyst applications. Our result indicates for the first time that Fe3+/Fe2+ modification can not only improve the photocatalytic performance but also long term stability of N-doped TiO2 nanocrystals.