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Twin Zn1-xCdxS Solid Solution: Highly Efficient Photocatalyst for Water Splitting
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DOI：10.1002/smll.202304784.png)
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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, Zn1-xCdxS 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 Zn1-xCdxS solid solution is prepared successfully, which lays a foundation for the construction of other twin crystals in the future. On twin Zn1-xCdxS, water tends to be dissociated after being adsorbed by Zn2+/Cd2+ at twin boundary, then the fast-moving electrons at twin boundary quickly combine with the protons already attached to S2- 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 Zn1-xCdxS apparent quantum efficiency of photocatalysis water splitting for hydrogen reached 82.5% (? = 420 nm). This research opens up an avenue to introduce twins in crystals and it hopes to shed some light on photocatalysis.
Keyword:
hydrogen production
photocatalytic
twins
water splitting
Zn1-xCdxS
期刊
IF:
12.1
论文数:
3.0W
被引数:
16.4W
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