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In this study, we synthesized a combination of graphene oxide (GO) and titanium dioxide (TiO<sub>2</sub>) and confirm that GO can be used for CO<sub>2</sub> photoreduction. TiO<sub>2</sub> exhibited highly efficient combination with other conventional electric charges generated by these paration phenomenon for suppression of hole-electron recombination. This improved the efficiency of CO<sub>2</sub> photoreduction. The synthetic form of GO-TiO<sub>2</sub> used in this study was agraphene sheet surrounded by TiO<sub>2</sub> powder. Efficiency and stability were enhanced by combination of GO and TiO<sub>2</sub>. In a CO<sub>2</sub> photoreduction experiment, the highest CO conversion rate was 0.652 μmol/g·h in GO10-TiO<sub>2</sub> (2.3-fold that of pure TiO<sub>2</sub>) and the highest CH<sub>4</sub> production rate was 0.037 μmol/g·h in GO0.1-TiO<sub>2</sub> (2.4-fold that of pure TiO<sub>2</sub>). GO enhances photocatalytic efficiency by functioning as a support and absorbent, and enabling charge separation. With increasing GO concentration, the CH<sub>4</sub> level decreases to~45% due to decreased transfer of electrons. In this study, TiO<sub>2</sub> together with GO yielded a different result than the normal doping effect and selective CO<sub>2</sub> photoreduction.
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참고문헌 (27)
참고문헌 신청
Gao, P. / 2014 / Effects of Various TiO2 Nanostructures and Graphene Oxide on Photocatalytic Activity of TiO2 / Journal of Hazardous Materials 279:96~104
Garcia-Gallastegui, A. / 2012 / Graphene Oxide as Support for Layered Double Hydroxides: Enhancing the CO2 Adsorption Capacity / Chemistry of Materials 24(23):4531~4539
Gaya, U. I. / 2008 / Heterogeneous Photocatalytic Degradation of Organic Contaminants over Titanium Dioxide: a Review of Fundamentals, Progress and Problems / Journal of Photochemistry and Photobiology C: Photochemistry Reviews 9(1):1~12
Hsu, H. C. / 2012 / Graphene Oxide as a Promising Photocatalyst for CO2 to Methanol Conversion / Nanoscale 5(1):262~268
Hu, B. / 2013 / Thermal, Electrochemica and Photochemical Conversion of CO2 to Fuels and Valueadded Products / Journal of CO2 Utilization 1:18~27
Garcia-Gallastegui, A. / 2012 / Graphene Oxide as Support for Layered Double Hydroxides: Enhancing the CO2 Adsorption Capacity / Chemistry of Materials 24(23):4531~4539
Gaya, U. I. / 2008 / Heterogeneous Photocatalytic Degradation of Organic Contaminants over Titanium Dioxide: a Review of Fundamentals, Progress and Problems / Journal of Photochemistry and Photobiology C: Photochemistry Reviews 9(1):1~12
Hsu, H. C. / 2012 / Graphene Oxide as a Promising Photocatalyst for CO2 to Methanol Conversion / Nanoscale 5(1):262~268
Hu, B. / 2013 / Thermal, Electrochemica and Photochemical Conversion of CO2 to Fuels and Valueadded Products / Journal of CO2 Utilization 1:18~27
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