The construction of a MAPbBr3/La2Ti2O7 organic-inorganic dual perovskite heterojunction for photocatalytic CO2 reduction

Considering the wide band gap of La2Ti2O7, and the limited separation efficiency of charge carriers in MAPbBr(3), we designed and easily fabricated a MAPbBr(3)/La2Ti2O7 dual perovskite heterojunction with similar crystal structures for efficient photocatalytic CO2 reduction. Owing to the improved visible light absorption capacity, separation efficiency of the photogenerated electron-hole pairs, and similar spatial crystal structure, the optimal MAPbBr(3)/La2Ti2O7 dual perovskite heterojunction exhibited significantly enhanced photocatalytic activity for CO production at a rate of 18.9 mu mol g(-1), which was 4.3 times greater than that of the original MAPbBr(3).