Photocatalytic CO2 conversion over alkali modified TiO2 without loading noble metal cocatalyst

Surface modification of TiO2 with NaOH promoted the chemisorption, activation and photocatalytic CO2 reduction. An optimized loading amount of NaOH kept a good balance between CO2 chemisorption quantity and BET surface area of TiO2. This noble metal free method provides a simple pathway for effective multiple H+/e(-) CO2 photoreduction.