In this work, we report the photoactivity of BaSnO3 in the photoreduction of methylviologen and the effect of quantum dot sensitization by covalently linking CdTe/CdS core/shell quantum dots in the surface of BaSnO3.FCT - CFUM Strategic Project PEst-C/FIS/UI0607/2013 (F-COMP-01-0124-FEDER-022711)