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Issue 23, 2017
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Photocatalytic hydrogen evolution performance of NiS cocatalyst modified LaFeO3/g-C3N4 heterojunctions

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Abstract

NiS cocatalyst modified LaFeO3/g-C3N4 heterostructures were successfully prepared and their photocatalytic hydrogen evolution performance under visible light irradiation was presented. LaFeO3/g-C3N4/NiS composites were characterized by transmission electron microscopy (TEM), scanning electron microscopy (SEM), X-ray diffraction (XRD), inductively coupled plasma mass spectrometry (ICP-MS), X-ray photoelectron spectroscopy (XPS), nitrogen adsorption desorption isotherms, UV-vis diffuse reflectance spectroscopy (DRS), transient photocurrent responses and electrochemical impedance spectroscopy (EIS). The results indicated that the LaFeO3/g-C3N4/NiS heterostructures had enhanced photocatalytic hydrogen evolution performance than pure g-C3N4, LaFeO3 and LaFeO3/g-C3N4. 5%-LaFeO3/g-C3N4/2%NiS exhibited the highest photocatalytic hydrogen evolution rate of 121 μmol g−1 h−1 under visible light, which was almost 60 times higher than the hydrogen evolution rate of 5%-LaFeO3/g-C3N4. The effective separation of photogenerated electron–hole pairs in the LaFeO3/g-C3N4 Z-scheme system with NiS as a cocatalyst enhanced the photocatalytic hydrogen evolution performance. This study provided a facile approach to prepare NiS modified LaFeO3/g-C3N4 heterostructures and to construct an effective photocatalytic system for hydrogen evolution under visible light irradiation.

Graphical abstract: Photocatalytic hydrogen evolution performance of NiS cocatalyst modified LaFeO3/g-C3N4 heterojunctions

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Publication details

The article was received on 21 Aug 2017, accepted on 25 Oct 2017 and first published on 07 Nov 2017


Article type: Paper
DOI: 10.1039/C7NJ03120C
Citation: New J. Chem., 2017,41, 14602-14609

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    Photocatalytic hydrogen evolution performance of NiS cocatalyst modified LaFeO3/g-C3N4 heterojunctions

    K. Xu, H. Xu, G. Feng and J. Feng, New J. Chem., 2017, 41, 14602
    DOI: 10.1039/C7NJ03120C

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