| 초록 |
Increasing atmospheric carbon dioxide (CO2) concentration is a concern, as the relatively high heat capacity of carbon dioxide is considered to result in accelerated global warming. Highly efficient photocatalytic conversion of CO2 demands the design of photocatalysts that offer stronger adhesion to CO2 and the reaction intermediates. In this study, We report significantly enhanced gas-phase photocatalytic conversion of carbon dioxide to methane on Cu/TiO2 nanoparticles when Bi2O3 is introduced as a promoter in the vicinity of Cu. CH4 generation rate of 11.90 µmol/gh recorded in the case of Cu-Bi2O3/TiO2 is an order of magnitude higher than the case of Cu/TiO2. The enhanced catalysis is attributed to facilitated migration of CO* from Cu to Bi2O3 surface.
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