期刊
CHEMCATCHEM
卷 10, 期 19, 页码 4395-4405出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cctc.201800827
关键词
Black phosphorus; Zn0.5Cd0.5S; nanocomposites; photocatalytic hydrogen production; co-catalyst
资金
- Natural Science Foundation of Shandong Province [ZR2017MB006, ZR2017ZB0315]
- Taishan Scholar Program of Shandong Province
In this work, a photocatalyst composited of Zn0.5Cd0.5S and 2D black phosphorus (BP) nanosheets was successfully constructed for high-efficient hydrogen evolution. The structure, morphology and chemical composition of BPx/Zn0.5Cd0.5S photocatalysts were characterized by X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM), atomic force microscopy (AFM), and X-ray photoelectron spectroscopy (XPS). Remarkably, the hydrogen production rate of optimal BP15.2/Zn0.5Cd0.5S nanocomposite achieves as high as 137.17 mmol/g/h under visible light irradiation (>420 nm), which is 5 times of that of pristine Zn0.5Cd0.5S. The corresponding apparent quantum efficiency (QE) is measured to be 36.3% at 420 nm. Moreover, the hydrogen production rate reaches 26.96 mmol/g/h for BP15.2/Zn0.5Cd0.5S under the irradiation of light with wavelength longer than 510 nm. The improved photocatalytic activity can be attributed to the interfacial contact between BP and Zn0.5Cd0.5S, which efficiently promotes electron-hole pair separation. Moreover, 2D black phosphorus has successfully extended the absorption spectrum of BPx/Zn0.5Cd0.5S to the wavelength longer than 510 nm. Our result highlights the significance of BP as co-catalyst in the development of new photocatalysis for hydrogen production from water.
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