Carbon dioxide-enhanced photosynthesis of methane and hydrogen from carbon dioxide and water over Pt-promoted polyaniline-TiO2 nanocomposites.

The combination of polyaniline with TiO2 significantly enhanced the photocatalytic reduction of CO2 with H2O owing to the increased CO2 chemisorption and the facilitated separation of photogenerated electron-hole pairs. We discovered that CO2 played a unique role in enhancing the electron-hole separation and the photocatalytic activity for polyaniline-containing catalysts.