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  • 09월 20일 16시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제126회 대한화학회 학술발표회 및 총회 Particle Size-Dependent Electron Transfer Kinetics on Plasmonic Au Photocatalyst

2020년 9월 3일 16시 55분 32초
MAT.P-485 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
10월 21일(수) 17:30~18:00
Materials Chemistry
저자 및
Donghee Kim, Youngsoo Kim1,*
Department of Chemistry, Yeungnam university, Korea
1Department of Chemistry, Yeungnam University, Korea
Plasmonic gold nanoparticles are drawing attention as a promising material for visible-light-driven photocatalysts due to their strong light absorption in the visible light region. Recently, much researches for the plasmonic photocatalysts has been reported that is for electron transfer kinetics and to drive important chemical reactions such as CO2 reduction and N2 fixation. Such researches, the size of the gold nanoparticles used were fixed around 13 nm in diameter, which is synthesized by the Turkevich method. The electron transfer kinetics can be tuned by the ability of light absorption. As the size of plasmonic gold nanoparticles grows, the absorption cross-section could be reduced because of the contribution of the scattering effect. Therefore, we focused on the change in electron transfer rate with varying the size of gold nanoparticles (~13 nm, ~20 nm, ~25 nm, ~35 nm). To investigate the photocatalytic activities on different sizes of gold nanoparticles, we employed Ferricyanide(Fe3+)/Ferrocyanide(Fe2+) redox couple as a colorimetric indicator. To find reaction kinetics by different sizes of gold nanoparticles, we conducted power-dependent and wavelength-dependent experiments and monitored the reaction conversion as a function of irradiation time.