4.6 Article

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

Journal

PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Volume 20, Issue 1, Pages 414-421

Publisher

ROYAL SOC CHEMISTRY
DOI: 10.1039/c7cp06682a

Keywords

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Funding

  1. National Natural Science Foundation of China [51472035, 51572036, 51506012]
  2. Science and Technology Department of Jiangsu Province [BY2016029-12, BE2014089, BY2015027-18]
  3. Science & Technology Bureau of Changzhou [CE20160001-2, CM20153006, CJ20179037]
  4. Changzhou University [ZMF17020042]
  5. PAPD of Jiangsu Higher Education Institutions

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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-RGO(25) photocatalyst was employed to degrade ciprofloxacin (CIP) in an aqueous solution under visible light irradiation. It exhibited enhanced photocatalytic activity compared to pure NiAl LDH, the degradation rate of the as-prepared NiAl LDH/Fe3O4-RGO(25) was 1.5 and even 3 times faster than that of NiAl LDH/RGO(25) and pure NiAl LDH, respectively. This enhancement of photocatalytic activity is attributed to the addition of graphene and Fe3O4 NPs, which both efficiently promote the separation of charge carriers and improve the optical absorption properties, synergistically facilitating the photocatalysis process. Furthermore, the NiAl LDH/Fe3O4-RGO(25) photocatalyst was magnetically separable and exhibited stable catalytic activity, which is beneficial to its practical application.

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