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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, AbdulSinhamahapatra, ApurbaKang, Tong-HyungGrimes, Craig A.Yu, Jong-SungIn, Su-Il
DGIST Authors
Yu, Jong-SungIn, Su-Il
Issue Date
Applied Catalysis B: Environmental, 215, 28-35
Article Type
Black Tio2Carbon DioxideCH4Co2 PhotoreductionConversionElectromagnetic Wave AbsorptionEnhanced Light AbsorptionsGlobal WarmingHydrocarbonsHydrogen ProductionIrradiationLightLight AbsorptionMagnesiothermic ReductionNanoparticlesNanoparticlesPhoto ReductionPhoto Catalytic PerformancePhotocatalytic SystemsPhotochemical ReductionPlatinumProduct SelectivitiesRedox ReactionsReduced TiO2Room TemperatureStable PerformanceTitanium DioxideVisible LightVisible Light AbsorptionWater
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
  • Author Yu, Jong-Sung Light, Salts and Water Research Group
  • Research Interests Materials chemistry; nanomaterials; electrochemistry; carbon and porous materials; fuel cell; battery; supercapacitor; sensor and photochemical catalyst
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Department of Energy Science and EngineeringLight, Salts and Water Research Group1. Journal Articles
Department of Energy Science and EngineeringGreen and Renewable Energy for Endless Nature(GREEN) Lab1. Journal Articles

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