Strong Built-In Electric Field-Assisted ZnO/ZnIn<sub>2</sub>S<sub>4</sub> S-Scheme Heterostructure to Promote Photocatalytic Hydrogen Production
Photocatalysis is an eco-friendly and significant perspective for generating hydrogen. Our study investigated the ZnO/ZnIn<sub>2</sub>S<sub>4</sub> heterojunction photocatalytic system prepared through hydrothermal technique. Accordingly, the ZnIn<sub>2</sub>S<sub>4</sub> nanofibers loaded with 11 mol % ZnO exhibited the hydrogen evolution rate of about 1998 μmol g<sup>-1</sup> h<sup>-1</sup>, which was 2.6 times higher than the pristine ZnIn<sub>2</sub>S<sub>4</sub>. In situ electron paramagnetic resonance results proved the S-scheme photocarrier transport route, and in situ KPFM further characterized the internal electric field between ZnO and ZnIn<sub>2</sub>S<sub>4</sub>. The development of S-scheme heterojunctions allows for the spatial segregation and transport of charges by preserving photoexcited holes and electrons with a tremendous redox potential. Furthermore, the photoelectrochemical analysis demonstrated that the S-scheme heterojunction could also be employed for the separation of photoexcited species.
Authors
- Yan Wu (ORCID: https://orcid.org/0000-0002-1252-5600)
- Shumail Farhan (ORCID: https://orcid.org/0000-0003-4137-3164)
- Songyu Yang (ORCID: https://orcid.org/0000-0001-9044-6927)
- Mingyang Liu (ORCID: https://orcid.org/0000-0002-6643-5096)
- Ling Zhou (ORCID: https://orcid.org/0009-0009-5898-5811)
- Q. Fang (ORCID: https://orcid.org/0000-0003-3393-1998)
Institutions
- China University of Geosciences (CN)
Publication Details
- Journal
- Inorganic Chemistry
- Published
- 2024-10-22
- DOI
- https://doi.org/10.1021/acs.inorgchem.4c03502
- Citations
- 33
- Primary Topic
- Advanced Photocatalysis Techniques
- Type
- article
- Field-Weighted Citation Impact
- 3.38
Funders
- National Natural Science Foundation of China