Strontium doped lanthanum manganites for efficient and robust photocatalytic water oxidation coupled with graphene oxide

Abstract

Strontium doped lanthanum manganites, La1−xSrxMnO3; (0.0<x<0.5) with a cubic perovskite structure were synthesized by conventional solid state route. La1−xSrxMnO3 shows an excellent photocatalytic properties in generating high amount of oxygen, were characterized and reported. Strontium doping and the angle between the Mn–O–Mn facilitate conduction pathways resulting in enhanced oxygen production. An apparent quantum yield (AQY) of ~7% has been achieved for La0.7Sr0.3MnO3. Further enhancement of photocatalytic properties were observed by the introduction of electron accepting graphene oxide (GO) which facilitates enhanced charge separation. An AQY of 8% has been achieved in La0.7Sr0.3MnO3—GO composite.