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Article Abstract
Comprehending the catalytic reaction implementation for heterostructure photocatalysts is crucial by scrutinizing the spatial separation and transfer process of photoexcited charges at nanoscale junctions. Herein, we fabricated the F-doped TiO/ZnInS-based S-scheme heterostructure using a direct liquid-assembly method. The optimum hydrogen evolution rate (HER) of ∼ 1.58 mmol gh was acquired for 30-FT@ZIS, which was about 15 and 2 times superior to the pristine F-doped TiO and ZnInS, respectively. The interaction between F-doped TiO and ZnInS facilitated the charge transfer from ZIS to FT which was confirmed through XPS. UV-vis spectroscopy and Mott-Schottky validated that F-doped TiO and ZnInS retain the suitable energy band alignment for the S-scheme heterostructure. In situ, KPFM and EPR analysis revealed that F-doped TiO and ZnInS possess a spontaneous photoelectrochemical response, and their junction significantly improves the internal electric field by separating photoexcited charge carriers. This work provides a conclusive experimental and theoretical validation for an internal electric field and charge flow direction in non-noble-metal-based heterostructure photocatalysts.
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| http://dx.doi.org/10.1016/j.jcis.2024.11.124 | DOI Listing |
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