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02월 28일 17시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능
제123회 대한화학회 학술발표회, 총회 및 기기전시회 안내
CO2 Activation and Reduction with Nafion/g-C3N4/CuInS2 Photocathode in Photoelectrochemical System
2019년 1월 23일 11시 39분 59초
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4월 19일 (금요일) 11:00~12:30
Ignasia Handipta Mahardika
, Young soo Kang
Chemistry, Sogang University, Korea
Department of Chemistry, Sogang University, Korea
Research on the reduction of carbon dioxide has been studied with various methods like photoelectrochemical cells (PEC), but the energy conversion efficiency level obtained is remained still as low. Therefore, the methods for reducing carbon dioxide will be developed with a system which contains several steps . The (040)-BiVO4 facet engineered photoanode has shown the successful result to improved charge carrier mobility and high photocatalytic active sites for solar light energy conversion . CuInS2 (CIS) polycrystalline chalcopyrite p-type semiconductor is s photocathode material which has a high photocurrent and tunable conduction band position for CO2 reduction into liquid solar fuels . The research will begin by developing CuInS2 (CIS) thin film for photocathode material and modified by the g-C3N4 nano-sheet catalyst to act as a reduction potential tuning and the combination of g-C3N4 with Nafion to do multiple proton-coupled multiple electron transfer reaction for CO2 reduction. An electron can be generated from photocatalyst and then stored instantly in a 2D conducting polymer, g-C3N4, which sequentially can be transported to a carbon dioxide reduction site. BiVO4 was also used as a photoanode material which has a function to produce many electrons and protons by water splitting reaction. Moreover, a one-pot reaction is conducting to react the activated carbon dioxide with proton which has been generated from water oxidation. The one-pot reaction is chosen as a strategy to improve reaction efficiency and produce large yields. This reaction is expected to produce ethanol as the final product. Further, the mechanism and analysis study are continued to understand and prove that this system will give a selected product.
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