Modification of photocatalytic property of BaTiO perovskite structure by FeO nanoparticles for CO reduction in gas phase.

In this work, perovskite structure of BaTiO was coupled with FeO in different molar ratios achieving the best photocatalytic performance of CO reduction in the presence of CH as reducing agent; both of them are main greenhouse gases. The photocatalysts were synthesized by facile hydrothermal method. The samples were characterized by XRD, FTIR, FESEM, EDX, UV-Vis DRS, and photoluminescence (PL) analyses. The BaTiO synthesized in this research showed a weak PL signal which is due to the intrinsic ferroelectric property as has been observed in previous reports. Compared to the pure BaTiO and FeO, the heterojunctions exhibited enhanced photocatalytic activity. The maximum CO reduction under visible light irradiation was obtained to be 22% during 60 min process time. The enhanced photocatalytic activity could be attributed to the increased optical absorption, the good separation, and immigration of photogenerated charge carriers that decreased the recombination rate of charge carriers in the n-n heterojunction.