Abstract
Solar‐driven CO2 conversion is a promising approach to tackle the issues of increasing greenhouse gases and energy shortage. Herein, a defective amine/silver species‐modified mesoporous TiO2 (NH2–TiO2−x–Ag) nanoparticle assembly for photocatalytic CO2 reduction is reported. In particular, simultaneous oxygen vacancy incorporation and silver species anchoring in the formation of NH2–TiO2 derived from amine‐modified protonated titanate during polyol‐mediated solvothermal treatment are achieved. Indeed, the NH2–TiO2−x–Ag with different amounts of Ag species can enhance photocatalytic CO2 reduction into CH4 and CO. The NH2–TiO2−x–Ag‐0.05 sample has the highest CH4 and CO yields with rates of 6.11 and 0.91 μmol g−1 h−1, respectively, which are about 10.7 and 7 times higher than that of pristine NH2–TiO2. These findings demonstrate that the synergic impact of oxygen vacancies and metallic silver sites embedded into NH2–TiO2 can prevent poor light harvesting, fast recombination of photogenerated electrons and holes, and inadequate surface‐active sites.
Published Version
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