Nanoparticles of copper oxide on layered double hydroxides and the derived solid solutions as wide spectrum active nano-photocatalysts

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Abstract

Tailoring efficient photocatalytic competences for purifying textile aqueous effluents by utilizing the collective properties of nanoassembly systems is a challenging process. We report nanoparticles of CuO on layered double hydroxide matrices (Cu/LDHs) and their derived solid solutions as new wide spectrum active nano-photocatalysts for the degradation of the industrial dye Nylosan Navy (Clariant Produkte) in aqueous solutions. The fabrication of Cu/LDH nanoarchitectonics is simple and cost effective; it is based on the formation of nanoparticles of CuO on the surface of the eco-friendly clay during the structural reconstruction of the layered LDHs matrix in the aqueous solution of Cu(OAc)2. The derived solid solutions are obtained by calcination of Cu/LDHs at 750°C. Powder X-ray diffraction (PXRD), X-ray photoelectron spectroscopy (XPS), X-ray fluorescence (XRF), high resolution transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR) and N2adsorption–desorption (BET) measurements were used to investigate the structure, composition and size-morphology characteristics of the samples. Results confirm that nanoparticles of CuO, with diameters of ca. 5–7nm, are deposited on the larger nanoparticles (∼100nm) of the clay. UV–Vis analysis and the calculated optical direct band gap (Eg) values indicate the high absorbance capability of the samples under Vis and UV light while the TEM results indicate the formation of CuO-clay heterojunctions. Over the entire range of wavelength Cu/ZnLDH shows the highest degradation efficiency with almost complete degradation of the dye after 6h while under Vis light Cu/ZnLDH750 shows the maximum activity, degrading almost 55% of the dye.
Original languageUnknown
Pages (from-to)60-66
JournalChemical Engineering Journal
Volume222
Issue numberNA
DOIs
Publication statusPublished - 1 Jan 2013

Cite this

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title = "Nanoparticles of copper oxide on layered double hydroxides and the derived solid solutions as wide spectrum active nano-photocatalysts",
abstract = "Tailoring efficient photocatalytic competences for purifying textile aqueous effluents by utilizing the collective properties of nanoassembly systems is a challenging process. We report nanoparticles of CuO on layered double hydroxide matrices (Cu/LDHs) and their derived solid solutions as new wide spectrum active nano-photocatalysts for the degradation of the industrial dye Nylosan Navy (Clariant Produkte) in aqueous solutions. The fabrication of Cu/LDH nanoarchitectonics is simple and cost effective; it is based on the formation of nanoparticles of CuO on the surface of the eco-friendly clay during the structural reconstruction of the layered LDHs matrix in the aqueous solution of Cu(OAc)2. The derived solid solutions are obtained by calcination of Cu/LDHs at 750°C. Powder X-ray diffraction (PXRD), X-ray photoelectron spectroscopy (XPS), X-ray fluorescence (XRF), high resolution transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR) and N2adsorption–desorption (BET) measurements were used to investigate the structure, composition and size-morphology characteristics of the samples. Results confirm that nanoparticles of CuO, with diameters of ca. 5–7nm, are deposited on the larger nanoparticles (∼100nm) of the clay. UV–Vis analysis and the calculated optical direct band gap (Eg) values indicate the high absorbance capability of the samples under Vis and UV light while the TEM results indicate the formation of CuO-clay heterojunctions. Over the entire range of wavelength Cu/ZnLDH shows the highest degradation efficiency with almost complete degradation of the dye after 6h while under Vis light Cu/ZnLDH750 shows the maximum activity, degrading almost 55{\%} of the dye.",
keywords = "Nano-photocatalyst, Photodegradation, Layered double hydroxides",
author = "Fortunato, {Elvira Maria Correia}",
note = "Sem pdf conforme despacho. falta inserir na organiza{\cc}{\~a}o: Tech Univ Gh Asachi Iasi, Fac Chem Engn & Environm Protect, Dept Chem Engn e Tokyo Inst Technol, Mat & Struct Lab, Midori Ku",
year = "2013",
month = "1",
day = "1",
doi = "10.1016/j.cej.2013.02.039",
language = "Unknown",
volume = "222",
pages = "60--66",
journal = "Chemical Engineering Journal",
issn = "0300-9467",
publisher = "Elsevier Science",
number = "NA",

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TY - JOUR

T1 - Nanoparticles of copper oxide on layered double hydroxides and the derived solid solutions as wide spectrum active nano-photocatalysts

AU - Fortunato, Elvira Maria Correia

N1 - Sem pdf conforme despacho. falta inserir na organização: Tech Univ Gh Asachi Iasi, Fac Chem Engn & Environm Protect, Dept Chem Engn e Tokyo Inst Technol, Mat & Struct Lab, Midori Ku

PY - 2013/1/1

Y1 - 2013/1/1

N2 - Tailoring efficient photocatalytic competences for purifying textile aqueous effluents by utilizing the collective properties of nanoassembly systems is a challenging process. We report nanoparticles of CuO on layered double hydroxide matrices (Cu/LDHs) and their derived solid solutions as new wide spectrum active nano-photocatalysts for the degradation of the industrial dye Nylosan Navy (Clariant Produkte) in aqueous solutions. The fabrication of Cu/LDH nanoarchitectonics is simple and cost effective; it is based on the formation of nanoparticles of CuO on the surface of the eco-friendly clay during the structural reconstruction of the layered LDHs matrix in the aqueous solution of Cu(OAc)2. The derived solid solutions are obtained by calcination of Cu/LDHs at 750°C. Powder X-ray diffraction (PXRD), X-ray photoelectron spectroscopy (XPS), X-ray fluorescence (XRF), high resolution transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR) and N2adsorption–desorption (BET) measurements were used to investigate the structure, composition and size-morphology characteristics of the samples. Results confirm that nanoparticles of CuO, with diameters of ca. 5–7nm, are deposited on the larger nanoparticles (∼100nm) of the clay. UV–Vis analysis and the calculated optical direct band gap (Eg) values indicate the high absorbance capability of the samples under Vis and UV light while the TEM results indicate the formation of CuO-clay heterojunctions. Over the entire range of wavelength Cu/ZnLDH shows the highest degradation efficiency with almost complete degradation of the dye after 6h while under Vis light Cu/ZnLDH750 shows the maximum activity, degrading almost 55% of the dye.

AB - Tailoring efficient photocatalytic competences for purifying textile aqueous effluents by utilizing the collective properties of nanoassembly systems is a challenging process. We report nanoparticles of CuO on layered double hydroxide matrices (Cu/LDHs) and their derived solid solutions as new wide spectrum active nano-photocatalysts for the degradation of the industrial dye Nylosan Navy (Clariant Produkte) in aqueous solutions. The fabrication of Cu/LDH nanoarchitectonics is simple and cost effective; it is based on the formation of nanoparticles of CuO on the surface of the eco-friendly clay during the structural reconstruction of the layered LDHs matrix in the aqueous solution of Cu(OAc)2. The derived solid solutions are obtained by calcination of Cu/LDHs at 750°C. Powder X-ray diffraction (PXRD), X-ray photoelectron spectroscopy (XPS), X-ray fluorescence (XRF), high resolution transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR) and N2adsorption–desorption (BET) measurements were used to investigate the structure, composition and size-morphology characteristics of the samples. Results confirm that nanoparticles of CuO, with diameters of ca. 5–7nm, are deposited on the larger nanoparticles (∼100nm) of the clay. UV–Vis analysis and the calculated optical direct band gap (Eg) values indicate the high absorbance capability of the samples under Vis and UV light while the TEM results indicate the formation of CuO-clay heterojunctions. Over the entire range of wavelength Cu/ZnLDH shows the highest degradation efficiency with almost complete degradation of the dye after 6h while under Vis light Cu/ZnLDH750 shows the maximum activity, degrading almost 55% of the dye.

KW - Nano-photocatalyst

KW - Photodegradation

KW - Layered double hydroxides

U2 - 10.1016/j.cej.2013.02.039

DO - 10.1016/j.cej.2013.02.039

M3 - Article

VL - 222

SP - 60

EP - 66

JO - Chemical Engineering Journal

JF - Chemical Engineering Journal

SN - 0300-9467

IS - NA

ER -