Issue 36, 2022

α-NiS–β-NiS growth on Cd0.5Zn0.5S formed Schottky heterojunctions for enhanced photocatalytic hydrogen production

Abstract

Novel α-NiS–β-NiS nanosheet modified Cd0.5Zn0.5S nanoparticle heterojunctions have been successfully synthesized via a two-step solvothermal method. The α-NiS–β-NiS/Cd0.5Zn0.5S heterojunctions were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), ultraviolet photoelectron spectroscopy (UPS) and UV-visible diffuse reflectance spectroscopy (UV-vis). The results reveal that the α-NiS–β-NiS/Cd0.5Zn0.5S heterojunctions have well-constructed integrated structures with strong adhesion between the Cd0.5Zn0.5S and α-NiS–β-NiS, which is beneficial to charge separation and transfer. The α-NiS–β-NiS/Cd0.5Zn0.5S heterojunctions demonstrated efficient photocatalytic hydrogen production and excellent stability, with hydrogen production reaching 3113 μmol g−1 h−1 for optimized structures which is approximately 2.9 times higher than that of pure Cd0.5Zn0.5S. More interestingly, the hydrogen production performance of NiS/Cd0.5Zn0.5S was influenced by the NiS crystal phase and the H2 generation rate of the α-NiS–β-NiS/Cd0.5Zn0.5S heterojunction is 1.3 times higher than that of β-NiS/Cd0.5Zn0.5S. According to the results of characterization and photocatalytic activity, the possible hydrogen evolution of mechanism for α-NiS–β-NiS/Cd0.5Zn0.5S was also proposed.

Graphical abstract: α-NiS–β-NiS growth on Cd0.5Zn0.5S formed Schottky heterojunctions for enhanced photocatalytic hydrogen production

Supplementary files

Article information

Article type
Paper
Submitted
07 Jul 2022
Accepted
14 Aug 2022
First published
15 Aug 2022

New J. Chem., 2022,46, 17469-17478

α-NiS–β-NiS growth on Cd0.5Zn0.5S formed Schottky heterojunctions for enhanced photocatalytic hydrogen production

L. Shen, S. Qi, Y. Jin, C. Li, J. Cheng, H. Wang, H. Ma and L. Li, New J. Chem., 2022, 46, 17469 DOI: 10.1039/D2NJ03338K

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