Role of valency ordering on the visible light photocatalytic activity of BaBi0.53+Bi0.55+O3

Breaking of valency ordering in Bi3+O2−Bi5+ network in BaBi0.53+Bi0.55+O3 by La3+ substitution (La3+O2−Bi5+) hinders Bi3+-to-Bi5+ charge transfer and reduces photocatalytic activity.