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Layered double hydroxides reconstructed in NiSO4 aqueous solution as highly efficient photocatalysts for degrading two industrial dyes

Paper ID Volume ID Publish Year Pages File Format Full-Text
46881 46452 2011 7 PDF Available
Title
Layered double hydroxides reconstructed in NiSO4 aqueous solution as highly efficient photocatalysts for degrading two industrial dyes
Abstract

Nanostructured photocatalysts, that can effectively photodegrade the industrial dyes drimaren red and drimaren navy (Clariant Produkte), were obtained by the structural reconstruction of MgAlLDH and MgFeAlLDH anionic clays in NiSO4 aqueous solution. X-ray diffraction (XRD), energy dispersive X-ray (EDX) mapping, X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), field emission scanning electron microscopy (FESEM), N2 adsorption at 77 K and UV–vis analysis were adopted to investigate the structure, surface, micromorphology and photoresponsive properties of the reconstructed clays, as oposed to the as-synthesized clays. Results show that MgAlLDH and MgFeAlLDH reconstruction in NiSO4 aqueous solution gives rise to nanostructured enssembles defined by high density nanoparticles of oxidized nickel deposited on the larger LDHs flakes. IR spectroscopy (FTIR) results indicate that SO42− replaced CO32− in the interlayer space of the reconstructed clays. It was found that the dyes’ photodegradation is greatly enhanced by the deposition of nanosized nickel on the surface of the clay but is also influenced by the specific composition of the parent clay.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► LDHs reconstructed in NiSO4 aqueous solution as highly efficient photocatalysts in degrading two industrial dyes. ► Self-assemblies of high density nanoparticles of oxidized nickel deposited on the particles of the clay. ► The composition of the clay affected the dyes photodegradation.

Keywords
Layered double hydroxides; Photodegradation; Dyes; Anionic clay
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Layered double hydroxides reconstructed in NiSO4 aqueous solution as highly efficient photocatalysts for degrading two industrial dyes
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 107, Issues 3–4, 21 September 2011, Pages 253–259
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
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Any Questions? feel free to contact us