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Rare earth elements Sm modified graphite phase carbon nitride heterostructure for photocatalytic hydrogen production

Abstract

The photocatalytic nanomaterials of rare earth metals modified g-C3N4 were successfully prepared by simple hydrothermal ion exchange method. As a high activity photocatalyst, the hydrogen evolution amount of the Sm2O3@Ni7S6/g-C3N4 catalyst is nearly 3 mmol·g-1·h-1 under the visible light irradiation for 3h, which was much more than Ni7S6/g-C3N4 catalyst. The character of Sm2O3@Ni7S6/g-C3N4 were analyzed by SEM, TEM, XRD, XPS, UV-Vis, and fluorescence spectra etc. The results showed that the deposited Sm2O3@Ni7S6 was uniformly dispersed on the g-C3N4 sheet, the Sm2O3@Ni7S6 was used as a cocatalyst to improve the electron transfer rate and hydrogen production rate, reduced the compound rate of electron and hole in the composite material. There was a strong synergy between Sm2O3@Ni7S6 and g-C3N4 which improved photocatalytic performance. The UV-vis spectra showed that the absorption range of Sm2O3@Ni7S6/g-C3N4 was enlarged, forbidden band width was smaller. The BET results showed that Sm2O3@Ni7S6/g-C3N4 had greater specific surface area and pore volume which were beneficial to the adsorption of dye molecules and enhanced the photocatalytic activity. Therefore, rare earth metal Sm oxides might be a potential cocatalyst for the design of a new photocatalyst.

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Publication details

The article was received on 05 Nov 2018, accepted on 06 Dec 2018 and first published on 07 Dec 2018


Article type: Paper
DOI: 10.1039/C8NJ05619F
Citation: New J. Chem., 2018, Accepted Manuscript
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    Rare earth elements Sm modified graphite phase carbon nitride heterostructure for photocatalytic hydrogen production

    L. Li, H. Yu, J. Xu, S. Zhao, Z. Liu and Y. Li, New J. Chem., 2018, Accepted Manuscript , DOI: 10.1039/C8NJ05619F

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