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Efficient solar light photoreduction of CO2 to hydrocarbon fuels via magnesiothermally reduced TiO2 photocatalyst
- Efficient solar light photoreduction of CO2 to hydrocarbon fuels via magnesiothermally reduced TiO2 photocatalyst
- Razzaq, Abdul; Sinhamahapatra, Apurba; Kang, Tong-Hyung; Grimes, Craig A.; Yu, Jong-Sung; In, Su-Il
- DGIST Authors
- Yu, Jong-Sung; In, Su-Il
- Issue Date
- Applied Catalysis B: Environmental, 215, 28-35
- Article Type
- Black Tio2; Carbon Dioxide; CH4; Co2 Photoreduction; Conversion; Electromagnetic Wave Absorption; Enhanced Light Absorptions; Global Warming; Hydrocarbons; Hydrogen Production; Irradiation; Light; Light Absorption; Magnesiothermic Reduction; Nanoparticles; Nanoparticles; Photo Reduction; Photo Catalytic Performance; Photocatalytic Systems; Photochemical Reduction; Platinum; Product Selectivities; Redox Reactions; Reduced TiO2; Room Temperature; Stable Performance; Titanium Dioxide; Visible Light; Visible Light Absorption; Water
- Elevated atmospheric CO2 levels are recognized as a key driver of global warming. Making use of sunlight to photoreduce CO2, in turn fabricating hydrocarbon fuels compatible with the current energy infrastructure, is a compelling strategy to minimize atmospheric CO2 concentrations. However, practical application of such a photocatalytic system requires significant efforts for improved photoreduction performance and product selectivity. Herein, we investigate the performance of our newly developed reduced TiO2, prepared by a reduction process using Mg in 5% H2/Ar, for photoconversion of CO2 and water vapor to hydrocarbons, primarily CH4. Using Pt nanoparticles as a co-catalyst, under simulated solar light irradiation the reduced anatase TiO2 exhibits a relatively stable performance with a threefold increase in the rate of CH4 production (1640.58 ppm g−1 h−1, 1.13 μmol g−1 h−1) as compared to anatase TiO2 nanoparticles (546.98 ppm g−1 h−1, 0.38 μmol g−1 h−1). The improved photocatalytic performance is attributed to enhanced light absorption, suitable band edge alignment with respect to the CO2/CH4 redox potential, and efficient separation of photogenerated charges. Our results suggest that the Pt-sensitized reduced TiO2 can serve as an efficient photocatalyst for solar light CO2 photoreduction. © 2017 Elsevier B.V.
- Elsevier B.V.
- Related Researcher
Light, Salts and Water Research Group
Materials chemistry; nanomaterials; electrochemistry; carbon and porous materials; fuel cell; battery; supercapacitor; sensor and photochemical catalyst
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