In situ synthesis and catalytic properties of Cu2O nanoparticles based on clay materials and polyethylene glycol

Imangaliyeva, Ainur N.; Mastai, Yitzhak; Seilkhanova, Gulziya A.

doi:10.1007/s11051-019-4548-8

Cited by 4 publications

(1 citation statement)

References 40 publications

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“…e kinetics of the 4-NP reduction reaction in the presence of the CuO catalyst synthesized at different pH values is shown in Figure 5(e). Since the concentration of NaBH 4 is much higher than that of 4-NP, the analysis was conducted using the concentration of 4-NP alone [67]. e kinetic analysis results indicated that the data best fit with pseudo-first-order equation (equation (1)).…”

Section: Catalytic Reduction Reactionmentioning

confidence: 99%

Microwave-Assisted Synthesis of CuO Nanoparticles Using Cordia africana Lam. Leaf Extract for 4-Nitrophenol Reduction

Bekru

Zelekew

Andoshe

et al. 2021

Journal of Nanotechnology

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Copper-oxide-based nanomaterials play an important role as a low-cost alternative to nanoparticles of precious metals for the catalytic reduction of 4-nitrophenols. In this study, CuO nanoparticles were synthesized by a microwave-assisted method using Cordia africana Lam. leaf extract for reduction or stabilization processes. The synthesized CuO nanoparticles (NPs) were characterized using X-ray diffraction analysis (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and energy-dispersive spectroscopy (EDS). The analysis indicated that nanocrystals of the monoclinic CuO phase having a cluster of agglomerated morphology with a crystallite size of about 9 nm were synthesized. We also evaluated the catalytic performance of CuO NPs against 4-nitrophenol (4-NP) reduction. The catalyst has shown excellent performance completing the reaction within 12 min. Furthermore, the performance of CuO NPs synthesized at different pH values was investigated, and results indicated that the one synthesized at pH 7 reduced 4-NP effectively in shorter minutes compared to those obtained at higher pH values. The CuO NPs synthesized using Cordia africana Lam. leaf extract exhibited a better reducing capacity with an activity parameter constant of 75.8 min−1·g−1. Thus, CuO synthesized using Cordia africana Lam. holds a potential application for the catalytic conversion of nitroarene compounds into aminoarene.

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Section: Catalytic Reduction Reactionmentioning

confidence: 99%

Microwave-Assisted Synthesis of CuO Nanoparticles Using Cordia africana Lam. Leaf Extract for 4-Nitrophenol Reduction

Bekru

Zelekew

Andoshe

et al. 2021

Journal of Nanotechnology

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Synthesis and Photocatalytic Activity of Cu2O Microspheres upon Methyl Orange Degradation

et al. 2020

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Super-efficient Reduction of 4-nitrophenol Using Raw Pelagic Clays as Catalysts

Zhang,

Liu,

Sun

et al. 2023

Clays and clay miner.

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Natural clays are often employed as substrates for heterogeneous catalysts. However, the direct use of raw clays as catalysts has received less research attention. The objective of the present study was to help fill this gap by investigating catalytic properties of raw pelagic clays (PC) collected from the Indian Ocean. The raw PC were discovered to be efficient catalysts in the reduction of 4-nitrophenol (4-NP) in the presence of NaBH4. The effects of parameters including pH values, dosages of PC, and initial concentration of 4-NP and NaBH4 on the conversion or degradation rate of 4-NP have been investigated. The 4-NP was observed to be completely degraded within 480 s under conditions of 0.10 mM 4-NP, 25.0 mM NaBH4, and 0.20 g/L PC at an initial pH value of 7.0. The apparent rate constant was evaluated to be 27.53 × 10–3 s–1. Unlike previous pseudo-first order kinetics experiments, the induction period and degradation stages were observed to occur simultaneously during the PC catalysis. The S-shaped kinetics for 4-NP conversion was found to be perfectly matched by Fermi's function, and the enzyme-like catalysis by PC was appointed to describe the kinetics. Species of Fe(III), Mn(IV), and Mn(III) in PC were found to be essential, and were partly reduced to Fe(0) and Mn(II) by NaBH4 in our reaction, contributing to rapid conversion of 4-NP to 4-aminophenol (4-AP). The raw PC was converted to magnetic PC (m-PC) particles, which made PC particles separate easily for cycling use. This discovery would also have applications in continuous flow-fluid catalysis.

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In situ synthesis and catalytic properties of Cu2O nanoparticles based on clay materials and polyethylene glycol

Cited by 4 publications

References 40 publications

Microwave-Assisted Synthesis of CuO Nanoparticles Using Cordia africana Lam. Leaf Extract for 4-Nitrophenol Reduction

Microwave-Assisted Synthesis of CuO Nanoparticles Using Cordia africana Lam. Leaf Extract for 4-Nitrophenol Reduction

Synthesis and Photocatalytic Activity of Cu2O Microspheres upon Methyl Orange Degradation

Super-efficient Reduction of 4-nitrophenol Using Raw Pelagic Clays as Catalysts

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