https://scholars.lib.ntu.edu.tw/handle/123456789/616353
標題: | Boosting photocatalytic CO2 reduction in a ZnS/ZnIn2S4 heterostructure through strain-induced direct Z-scheme and a mechanistic study of molecular CO2 interaction thereon | 作者: | Sabbah A. Qorbani M. Fu F.-Y. Lin T.-Y. Wu H.-L. CHIH-I WU Chen K.-H. LI-CHYONG CHEN |
關鍵字: | CO2 reduction;Interfacial charge transfer;Photocatalysis;Z-Scheme;ZnIn2S4;ZnS | 公開日期: | 2022 | 卷: | 93 | 來源出版物: | Nano Energy | 摘要: | 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. © 2021 Elsevier Ltd |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85121146399&doi=10.1016%2fj.nanoen.2021.106809&partnerID=40&md5=adc3f3dcf4bc90b7b47d985ef2a4742c https://scholars.lib.ntu.edu.tw/handle/123456789/616353 |
ISSN: | 22112855 | DOI: | 10.1016/j.nanoen.2021.106809 | SDG/關鍵字: | Carbon dioxide;Charge transfer;Electric fields;Heterojunctions;II-VI semiconductors;Indium compounds;Photocatalysis;Photoelectron spectroscopy;Reaction intermediates;Zinc sulfide;Carrier separation;CO 2 reduction;Interfacial charge transfer;Mechanistic studies;Micro-strain;Photo-catalytic;Semiconductor heterostructure;Solar fuels;Strain induced;Z-scheme;Redox reactions |
顯示於: | 凝態科學研究中心 |
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