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Construction of magnetically separable NiAl LDH/Fe3O4-RGO nanocomposites with enhanced photocatalytic performance under visible light

Abstract

The magnetic NiAl Layered Doubled Hydroxide (LDH)/Fe3O4-RGO composites were successfully synthesized via a simple hydrothermal route. The as-prepared samples were well characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), field emission scanning electron microscopy (FE-SEM) and transmission electron microscopy (TEM). The results showed that NiAl LDH nanoplatelets and Fe3O4 nanoparticles sized around 15 nm were uniformly anchored on the surface of graphene sheets. The NiAl LDH/Fe3O4-RGO25 photocatalyst was employed to degrade ciprofloxacin (CIP) in aqueous solution under visible-light irradiation. It exhibited enhanced photocatalytic activity compared to pure NiAl LDH, which the degradation rate of the as-prepared NiAl LDH/Fe3O4-RGO25 was 1.5 and even 3 times faster than that of NiAl LDH/RGO25 and pure NiAl LDH, respectively. The enhancement of photocatalytic activity is attributed to the addition of graphene and Fe3O4 NPs, which both efficiently promote charge carriers separation and improve the optical absorption property, synergistically facilitating the photocatalysis process. Furthermore, the NiAl LDH/Fe3O4-RGO25 photocatalyst exhibited magnetically separable ability and stable catalytic activity, which is beneficial to its practical application.

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Publication details

The article was received on 29 Sep 2017, accepted on 13 Nov 2017 and first published on 13 Nov 2017


Article type: Paper
DOI: 10.1039/C7CP06682A
Citation: Phys. Chem. Chem. Phys., 2017, Accepted Manuscript
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    Construction of magnetically separable NiAl LDH/Fe3O4-RGO nanocomposites with enhanced photocatalytic performance under visible light

    J. Ni, J. Xue, L. Xie, J. Shen, G. He and H. Chen, Phys. Chem. Chem. Phys., 2017, Accepted Manuscript , DOI: 10.1039/C7CP06682A

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