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- W2890194605 abstract "Energy band alignment is essential for efficient charge transfer and solar light utilization in the solid Z-scheme system (SZSS). Here, we propose a strategy to fabricate the NiWO4/CdS composition as SZSS with an additional feature of a tunable bandgap via an ion-exchange reaction between the NiWO4 precursor and Cd2+/S2–, which is confirmed with SEM-EDS and Raman spectroscopy. UV–vis DRS and photoluminescence spectrometry determine the bandgap structures. Photosystem II is constructed from NiWO4, while the structure of photosystem I (PSI) depends on the S content in the composition. As the S content increases from 0 to 45 at%, the bandgap decreases from 2.62 to 1.86 eV for PSI. Moreover, the photoluminescence spectra and photocatalytic H2 generation experiments demonstrate that the introduction of S provides the proper band alignment for efficient charge transfer and H2 generation. Bandgap engineering in SZSS by adjusting the S content in the NiWO4/CdS composition can be also extended to other metal tungstate and metal sulfide composites (MWO4/MS)." @default.
- W2890194605 created "2018-09-27" @default.
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- W2890194605 date "2019-02-01" @default.
- W2890194605 modified "2023-09-27" @default.
- W2890194605 title "Bandgap engineering of NiWO4/CdS solid Z-scheme system via an ion-exchange reaction" @default.
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- W2890194605 doi "https://doi.org/10.1016/j.apcatb.2018.09.050" @default.
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