Noble-metal-free ternary CN-ZCS-NiS nanocomposites for enhanced solar photocatalytic H2 -production activity

Dalton Transactions : an International Journal of Inorganic Chemistry
Yanchun Yu, Enbo Wang

Abstract

Photocatalytic hydrogen production from water using a noble-metal-free catalyst has aroused tremendous and interdisciplinary attention. In this work, we report a series of original noble-metal-free ternary nanocomposites of C3N4-Zn0.5Cd0.5S heterojunctions loaded with NiS by a precipitation hydrothermal method. They were characterized by XRD, TEM, SEM-EDS, UV-vis, XPS, PL spectra, and transient photocurrent response measurements. The facts proved that they were efficient and stable photocatalysts to enhance the hydrogen production activity prepared by the precipitation hydrothermal method. Among these photocatalysts, C3N4-Zn0.5Cd0.5S-1% NiS showed excellent photocatalytic performance with a H2-production rate of 53.190 mmol g-1h-1which is 405 times higher than the pure CN. The high catalytic activity was attributed to the synergistic effect of the NiS cocatalyst and the nanoheterojunctions between ZCS nanoparticles and 2D CN nanosheets, which were propitious to accelerate charge transfer, promote the separation of photogenerated electron-hole pairs and expedite the surface H2-evolution kinetics.

References

Jan 6, 2004·Chemical Communications : Chem Comm·Michikazu HaraKazunari Domen
Aug 12, 2008·Langmuir : the ACS Journal of Surfaces and Colloids·Chiu-Hsun LinFeng-Chieh Wang
May 18, 2011·Journal of the American Chemical Society·Faheem MuhammadGuangshan Zhu
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Apr 14, 2015·Journal of the American Chemical Society·Xin-Bao HanEn-Bo Wang
Mar 17, 2017·Chemical Communications : Chem Comm·Shumin ChenJingping Wang

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Methods Mentioned

BETA
X-ray
scanning electron microscopy
scanning
three hybrid

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