In this study, photocatalytic activities of BaZrO₃ for CO₂ reduction were investigated in detail. BaZrO₃ samples were successfully obtained via a Pechini process at different temperatures. The prepared samples were characterized by X-ray diffraction (XRD), BET surface area measurement, UV-vis absorption spectroscopy, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The effects of the deposition of various metal nanoparticles on the surface of BaZrO₃ were also discussed. The results proved that the highly dispersed silver nanoparticles play a crucial role in improving the photocatalytic activities of BaZrO₃.