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|
| Type |
Poster Presentation |
| Area |
Environmental Energy |
| Room No. |
Event Hall |
| Time |
4월 20일 (금요일) 11:00~12:30 |
| Code |
ENVR.P-664 |
| Subject |
Reduced TiO2 photocatalyst by magnesiothermic reduction for enhanced photocatalytic CO2 Conversion into Hydrocarbon fuels |
| Authors |
Dae Hee Kim, SU IL IN*
Department of Energy Science and Engineering, Daegu Gyeongbuk Institute of Science & Technology, Korea
|
| Abstract |
Elevated atmospheric CO2 levels are recognized as a key driver of global warming. Making use of sun-light 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 mol·g−1·h−1) as compared to anatase TiO2 nanoparticles (546.98 ppm·g−1·h−1, 0.38 mol·g−1·h−1). The improved photocatalytic performance is attributed to enhanced light absorption, suitable band edge alignment with respect to the CO2/CH4 redoxpotential, 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. |
| E-mail |
puredream@dgist.ac.kr |
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121st General Meeting of the KCS