A solar photothermocatalytic approach for the CO2 conversion: Investigation of different synergisms on CoO-CuO/brookite TiO2-CeO2 catalysts

The photoactive features of the least common polymorph TiO2, i.e. brookite, were combined with thermocatalytic redox ones cerium oxide, focusing on effects addition small amounts Co-Cu oxides for solar CO2 conversion. By considering characterization data, a surface segregation hosted metal TiO2-CeO2 composite was evidenced, and their presence increased amount oxygen vacancies improved charge carriers separation. bimetallic oxides-based sample most performing one in photocatalytic carbon dioxide reduction at room temperature. formation monoxide methane 5 0.5 ?mol g?1h?1, respectively, about 10 times higher than that found bare brookite. A further enhancement obtained same CoO-CuO/TiO2-CeO2 catalyst applying photothermal approach. CO2-TPD FTIR measurements highlighted high interaction between sites.