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Twin Zn 1- x Cd x S Solid Solution: Highly Efficient Photocatalyst for Water Splitting.
- Source :
-
Small (Weinheim an der Bergstrasse, Germany) [Small] 2024 Jan; Vol. 20 (3), pp. e2304784. Date of Electronic Publication: 2023 Sep 12. - Publication Year :
- 2024
-
Abstract
- Twins in crystal defect, one of the significant factors affecting the physicochemical properties of semiconductor materials, are applied in catalytic conversion. Among the catalysts serving for photocatalytic water splitting, Zn <subscript>1-</subscript> <subscript>x</subscript> Cd <subscript>x</subscript> S has become a hot-point due to its adjustable energy band structure. Via limiting mass transport to control the release rate of anions/cations, twin Zn <subscript>1-</subscript> <subscript>x</subscript> Cd <subscript>x</subscript> S solid solution is prepared successfully, which lays a foundation for the construction of other twin crystals in the future. On twin Zn <subscript>1-</subscript> <subscript>x</subscript> Cd <subscript>x</subscript> S, water tends to be dissociated after being adsorbed by Zn <superscript>2+</superscript> /Cd <superscript>2+</superscript> at twin boundary, then the fast-moving electrons at twin boundary quickly combine with the protons already attached to S <superscript>2-</superscript> to form hydrogen. According to the theoretical calculation, not only the intracrystalline electron mobility, but also the extracrystalline capacity of water-adsorption/dissociation and proton-adsorption on the twin boundary are superior to those of the counterpart plane in defect-free phase. The synthetic twin Zn <subscript>1-</subscript> <subscript>x</subscript> Cd <subscript>x</subscript> S apparent quantum efficiency of photocatalysis water splitting for hydrogen reached 82.5% (λ = 420 nm). This research opens up an avenue to introduce twins in crystals and it hopes to shed some light on photocatalysis.<br /> (© 2023 Wiley-VCH GmbH.)
Details
- Language :
- English
- ISSN :
- 1613-6829
- Volume :
- 20
- Issue :
- 3
- Database :
- MEDLINE
- Journal :
- Small (Weinheim an der Bergstrasse, Germany)
- Publication Type :
- Academic Journal
- Accession number :
- 37699758
- Full Text :
- https://doi.org/10.1002/smll.202304784