研究成果 - 陳貴賢 博士
尖端材料與表面科學組
尖端材料實驗室 (AML)
主持人:陳貴賢 博士
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主持人:陳貴賢 博士
電子郵件:點此顯示(開新頁)
辦公室:228
辦公室電話:+886-2-2366-8232
實驗室:NB03, 台大凝態中心-1002,1014,1016
實驗室電話:+886-2-3366-5231
Boosting photocatalytic CO2 reduction in a ZnS/ZnIn2S4 heterostructure through strain-induced direct Z-scheme and a mechanistic study of molecular CO2 interaction thereon
Nano Energy, 93, 106809 (2022).
Employing direct Z-scheme semiconductor heterostructures in photocatalysis offers efficient charge carrier separation and isolation of both redox reactions, thus beneficial to reduce CO2 into solar fuels. Here, a ZnS/ZnIn2S4 heterostructure, comprising cubic ZnS nanocrystals on hexagonal ZnIn2S4 (ZIS) nanosheets, is successfully fabricated in a single-pot hydrothermal approach. The composite ZnS/ZnIn2S4 exhibits microstrain at its interface with an electric field favorable for Z-scheme. At an optimum ratio of Zn:In (~ 1:0.5), an excellent photochemical quantum efficiency of around 0.8% is reached, nearly 200-fold boost compared with pristine ZnS. Electronic levels and band alignments are deduced from ultraviolet photoemission spectroscopy and UV-Vis. Evidence of the direct Z-scheme and carrier dynamics is verified by photo-reduction experiment, along with photoluminescence (PL) and time-resolved PL. Finally, diffuse-reflectance infrared Fourier transformed spectroscopy explores the CO2 and related intermediate species adsorbed on the catalyst during the photocatalytic reaction. This microstrain-induced direct Z-scheme approach opens a new pathway for developing next-generation photocatalysts for CO2 reduction.
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最後更新於 2024-11-04 14:43:31
地址: 106319 台北市羅斯福路四段一號 或 106923 臺北臺大郵局 第23-166號信箱
電話:886-2-2362-0212 傳真:886-2-2362-0200 電子郵件:iamspublic@gate.sinica.edu.tw
最後更新於 2024-11-04 14:43:31