A tetragonal tungsten bronze-type photocatalyst: Ferro-paraelectric phase transition and photocatalysis

The relationship between ferroelectricity and photocatalytic activity was investigated on Sr0.7Ba0.3Nb2O6 (SBN-70). The photocatalytic reaction occurred in the ferroelectric phase but not the paraelectric phase. The ferroelectric polar domains facilitated photogenerated electron-hole separation.