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제123회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Photocatalytic properties of ZnO/ZnTe heterostructued film on a FTO substrate for Photoelectrochemical CO2 reduction

2019년 1월 23일 12시 15분 32초
PHYS.P-86 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
4월 19일 (금요일) 11:00~12:30
Physical Chemistry
저자 및
Mi Jung, Young soo Kang1,*
Chemistry, Sogang University, Korea
1Department of Chemistry, Sogang University, Korea
CO2 conversion into liquid fuels is one of the most important strategies to solve the global energy problems and the environmental global warming caused by green-house gases. Photoelectrochemical(PEC) CO2 reduction suggests an ideal pathway to produce carbon-based fuels from CO2 conversion using sunlight [1]. The development of new photocatalytic materials for the CO2 conversion in PEC system is the most important challenge to get highly hydrocarbon liquid product. Zinc telluride, ZnTe, has attracted considerable attention by including many desired properties promising semiconductor photocathode with a direct band gap of 2.26 eV to utilize solar light effectively [2]. In this study, we report the catalytic properties of zinc oxide nanorod covered with zinc telluride ZnO/ZnTe) as photocathode for CO2 reduction. ZnO/ZnTe film was fabricated fuorine doped tin oxide (FTO) substrate by anion exchange reactions based on the difference of solubility product constants (Ksp) for ZnO and ZnTe. The morphology, structure, optical and electrochemical properties of ZnO/ZnTe photocathode were investigated by scanning electron microscope, x-ray photoelectron spectroscopy, ultraviolet-visible spectroscopy, linear sweep voltammetry, chronoamperometry and electrochemical impedance spectroscopy. CO2 reduction reaction with ZnO/ZnTe photocathode was performed using BiVO4 photoanode in PEC system and was obtained formaldehyde and ethanol as major product.