Studies on the hydrolysis of {Cu[Al(OPr )4]2}, a single source precursor for CuAl2O4 spinel

Tomar, Nobel; Ghanti, Epsita; Bhagi, Ajay Kumar; Nagarajan, Rajamani

doi:10.1016/j.jnoncrysol.2009.08.026

Cited by 26 publications

(13 citation statements)

References 23 publications

(33 reference statements)

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“…The weak absorption bond observed at 1627 cm -1 is due to the bending vibration of absorbed water [21] and the absorption bond at 3427 cm -1 is because of the O-H stretching mode [22]. Nickel-oxygen stretching frequencies appeared in the range 579-727 cm -1 , associated with the vibrations of Ni-O, Al-O, and Ni-O-Al bonds [23]. Energy dispersive X-ray microanalysis (EDS) is an analytical technique which used for the chemical characterization of NiAl 2 O 4 -nanoparticles (sample 3, Fig.…”

Section: Photocatalytic Experimentalmentioning

confidence: 97%

NiAl2O4 nanoparticles: synthesis and characterization through modify sol–gel method and its photocatalyst application

Maddahfar

Ramezani

Sadeghi

et al. 2015

J Mater Sci: Mater Electron

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In this work, modify sol-gel method was used to synthesize nickel aluminate (NiAl 2 O 4 ) nanoparticles with aid of nickel nitrate hexahydrate and aluminium nitrate nonahydrate as the starting reagents in the presence of ethanol as the solvent. Besides, to examine the effect of different chelate agent such as citric acid monohydrate, oxalic acid, salicylic acid, and malic acid on the morphology and particle size of final products several tests were performed. The structural, morphological, and optical properties of as-obtained products were characterized by techniques such as Fourier transform infrared spectroscopy, X-ray diffraction, energy dispersive X-ray microanalysis, scanning electron microscopy and ultraviolet-visible. The photocatalytic degradation was investigated using methyl orange under visible light irradiation (k [ 400 nm). The resulting degradation rates of the methyl orange were measured to be as high as 90 % in 270 min.

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Section: Photocatalytic Experimentalmentioning

confidence: 97%

NiAl2O4 nanoparticles: synthesis and characterization through modify sol–gel method and its photocatalyst application

Maddahfar

Ramezani

Sadeghi

et al. 2015

J Mater Sci: Mater Electron

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“…According to literature, only five modes can be observed (A1g + Eg + 3F2g). The band at 790 cm −1 can be assigned to A1g, at 270, 590, 710 cm −1 to F2g and 475 cm −1 to Eg [35][36][37].…”

Section: Physicochemical Properties Of the Catalystsmentioning

confidence: 97%

Copper-Containing Mixed Metal Oxides (Al, Fe, Mn) for Application in Three-Way Catalysis

et al. 2020

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Mixed oxides were synthesized by co-precipitation of a Cu source in combination with Al, Fe or Mn corresponding salts as precursors. The materials were calcined at 600 and 1000 °C in order to crystallize the phases and to mimic the reaction conditions of the catalytic application. At 600 °C a mixed spinel structure was only formed for the combination of Cu and Mn, while at 1000 °C all the materials showed mixed spinel formation. The catalysts were applied in three-way catalysis using a reactor with a gas mixture containing CO, NO and O2. All the materials calcined at 600 °C displayed the remarkable ability to oxidize CO with O2 but also to reduce NO with CO, while the pure oxides such as CuO and MnO2 were not able to. The high catalytic activity at 600 °C was attributed to small supported CuO particles present and imperfections in the spinel structure. Calcination at 1000 °C crystallized the structure further which led to a dramatic loss in catalytic activity, although CuAl2O4 and CuFe2O4 still converted some NO. The materials were characterized by X-ray diffraction (XRD), Raman spectroscopy, H2-Temperatrue Programmed Reduction (H2-TPR), N2-sorption and scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM-EDX).

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“…Chemical analysis of the suspension could not be performed due to the highly unstable nature of the product, which was stable for an hour under inert atmosphere of nitrogen or argon. Hydrolysis experiments were carried out further to prove the viability of this precursor for the synthesis of CuAlO 2 ceramic using the approach adopted by Tomar et al 20 in case of {Cu[Al( i OPr) 4 ] 2 }. The controlled hydrolysis, under inert conditions, was performed by the slow addition of a 2‐propanol‐water mixture (1.2 mL) in 3:1 ratio to the precursor solution (100 mL) under constant stirring, when the color of the precursor remained orange even after 2 days of continuous hydrolysis giving rise to a yellow colored powder on removing the solvent.…”

Section: Resultsmentioning

confidence: 99%

Reactivity of Copper(I) Halides CuCl, CuI with Double Alkoxides MAl(iOPr)₄ (M = Na, K)

Tomar

Ghanti

Nagarajan

2010

Zeitschrift anorg allge chemie

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The heterogeneous reaction between CuX (X = Cl–, I–) with alkali metal double alkoxides MAl(iOPr)4 (M = Na, K) for the synthesis of CuI containing single source precursor has been studied. The orange colored precursor obtained showed strong absorption in the UV region (235 nm) and photo luminescence emission band at 450 nm, which evidenced the formation of an adduct between the reactants. Controlled hydrolysis and decomposition of the gel yielded delafossite structured CuAlO2 along with some CuO.

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Studies on the hydrolysis of {Cu[Al(OPr )4]2}, a single source precursor for CuAl2O4 spinel

Cited by 26 publications

References 23 publications

NiAl2O4 nanoparticles: synthesis and characterization through modify sol–gel method and its photocatalyst application

NiAl2O4 nanoparticles: synthesis and characterization through modify sol–gel method and its photocatalyst application

Copper-Containing Mixed Metal Oxides (Al, Fe, Mn) for Application in Three-Way Catalysis

Reactivity of Copper(I) Halides CuCl, CuI with Double Alkoxides MAl(iOPr)₄ (M = Na, K)

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Studies on the hydrolysis of {Cu[Al(OPr )4]2}, a single source precursor for CuAl2O4 spinel

Cited by 26 publications

References 23 publications

NiAl2O4 nanoparticles: synthesis and characterization through modify sol–gel method and its photocatalyst application

NiAl2O4 nanoparticles: synthesis and characterization through modify sol–gel method and its photocatalyst application

Copper-Containing Mixed Metal Oxides (Al, Fe, Mn) for Application in Three-Way Catalysis

Reactivity of Copper(I) Halides CuCl, CuI with Double Alkoxides MAl(iOPr)4 (M = Na, K)

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Reactivity of Copper(I) Halides CuCl, CuI with Double Alkoxides MAl(iOPr)₄ (M = Na, K)