Journal
APPLIED SURFACE SCIENCE
Volume 591, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apsusc.2022.153256
Keywords
H 2 production; p-n junction; 2D/2D heterostructure; Photocatalysis
Categories
Funding
- Shandong Province Natural Science Foundation [ZR2021ME046]
- Shandong Provincial Key Research and Development Program (Public Welfare Science and Technology Research) [2019GGX103010]
- Introduction and Cultivation Plan of Youth Innovation Talents for Universities of Shandong Province
- National Natural Science Foundation of China [11504153, 11504386]
- Science and Tech-nology Planning Project of Higher School in Shandong Province [J18KA243]
- Liaocheng University High-level Talents & PhD Research Startup Foundation [318051619]
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A high-performance FeWO4/ZnIn2S4 composite with abundant and tight 2D/ 2D hetero-interfaces was successfully designed and prepared in this study. The composite exhibited a significantly improved H-2 production rate compared to pure ZnIn2S4. The p-n heterojunction between FeWO4 and ZnIn2S4 nanosheets played a key role in enhancing the photocatalytic activity.
Constructing heterojunction structure can efficiently accelerate the separation and transfer of charge carriers and improve the photoactivity. Herein, a high-performance FeWO4/ZnIn2S4 composite with abundant and tight 2D/ 2D hetero-interfaces was rational designed and prepared. ZnIn2S4 nanosheets as hydrogen evolution species uniformly grow on the surface of FeWO4 flower, constructing a unique face-to-face hierarchical architecture. A maximum H-2 production rate of 3531.2 mu mol h(-1) g(-1) was obtained at the optimal mass ratio of FeWO4 to ZnIn2S4 , which was 35 times higher than pure ZnIn2S4 . Based on the experimental results and the Density Functional Theoretical calculation results, a possible p-n heterojunction mechanism and the transfer route of photoinduced charges toward the improved H-2 production were proposed. The p-n heterojunction between FeWO4 and ZnIn2S4 nanosheets plays a key role in enhancing photocatalytic H-2 production activity. Moreover, the intimate interface between two components and the preferable hydrophilic property favors the improved H-2 evolution rate.
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