Preparation of Ultrafine Copper Powders with Controllable Size via Polyol Process with Sodium Hydroxide Addition

Chokratanasombat, Pattanawong; Nisaratanaporn, Ekasit

doi:10.4186/ej.2012.16.4.39

Cited by 18 publications

(17 citation statements)

References 15 publications

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“…No characteristic peaks indexed to copper oxide were observed, indicating the phase purity of copper metal. The results obtained are in strong corelation with previous reports [58,59]. However, differences in intensity and broadness in corresponding peaks were evident.…”

Section: Atomic Force Microscopy (Afm)supporting

confidence: 89%

Catalytic Reductive Degradation of Methyl Orange Using Air Resilient Copper Nanostructures

Soomro

Nafady

Sirajuddin

et al. 2015

Journal of Nanomaterials

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The study describes the application of oxidation resistant copper nanostructures as an efficient heterogeneous catalyst for the treatment of organic dye containing waste waters. Copper nanostructures were synthesized in an aqueous environment using modified surfactant assisted chemical reduction route. The synthesized nanostructures have been characterized by UV-Vis, Fourier transform infrared spectroscopy FTIR spectroscopy, Atomic force microscopy (AFM), Scanning Electron Microscopy (SEM), and X-ray diffractometry (XRD). These surfactant capped Cu nanostructures have been used as a heterogeneous catalyst for the comparative reductive degradation of methyl orange (MO) in the presence of sodium borohydride (NaBH4) used as a potential reductant. Copper nanoparticles (Cu NPs) were found to be more efficient compared to copper nanorods (Cu NRds) with the degradation reaction obeying pseudofirst order reaction kinetics. Shape dependent catalytic efficiency was further evaluated from activation energy (EA) of reductive degradation reaction. The more efficient Cu NPs were further employed for reductive degradation of real waste water samples containing dyes collected from the drain of different local textile industries situated in Hyderabad region, Pakistan.

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Section: Atomic Force Microscopy (Afm)supporting

confidence: 89%

Catalytic Reductive Degradation of Methyl Orange Using Air Resilient Copper Nanostructures

Soomro

Nafady

Sirajuddin

et al. 2015

Journal of Nanomaterials

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“…The formation of zerovalent CuNPs can be explained by the chemical reduction of CuCl 2 · 2 H 2 O in the solution of hydrazine hydrate (NH 2 NH 2 · H 2 O) . It has been reported that in this reaction initially Cu 2+ ions were reduced to Cu + ions which precipitated as Cu 2 O particles, afterwards the reduction of cuprous oxide to copper metal powder occurred .…”

Section: Resultsmentioning

confidence: 99%

Investigation of Electroactive and Antibacterial Properties of Polyethersulfone Membranes Blended With Copper Nanoparticles

Özay

Dizge

Gülşen

et al. 2016

CLEAN Soil Air Water

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In this study, copper nanoparticles (CuNPs) were synthesized by sonochemical reduction of copper(II) hydrazine carboxylate complex in an aqueous medium. Asymmetric neat polyethersulfone (PES) and PES/CuNPs nanocomposite membranes were prepared via phase inversion method by dispersing copper nanoparticles in the PES casting solutions. X-ray diffraction and particle size distribution analyses were applied to characterize the CuNPs. Moreover, field emission scanning electron microscopy, atomic force microscopy (AFM), conductive atomic force microscopy (C-AFM), contact angle goniometry, and four-point probe techniques were used to investigate the physical and morphological properties of the PES/CuNPs nanocomposite membranes. Synthesized CuNPs were added into the casting solution at different concentrations. The effect of CuNPs concentration (0, 0.25, 0.5, 1.0, 2.0%, w/w) was tested on morphological changes and antibacterial properties of the prepared membranes. These copper nanoparticle composite membranes hold great promise in the engineering field for the production of sensors and self-cleaning membranes.

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“…Cauliflower-like particles obtained under conditions of vigorous hydrogen evolution and dendrites are the most frequent shapes of electrolytically produced Cu particles. 10,18 Particles of spherical shape, such as globules, are usually formed by non-electrolytic methods of synthesis, such as the gas-atomizing process, 26 the polyol process 27 and ultrasonic spray pyrolysis. 28 Copper particles of spherical shape have been obtained by electrolysis processes only in the presence of additives, such as a combination of potassium ferrocyanide and 2,2′-dipyridine.…”

Section: Resultsmentioning

confidence: 99%

Overpotential controls a morphology of electrolytically produced copper dendritic forms

et al. 2019

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The morphologies of copper dendritic forms obtained in both potentiostatic and galvanostatic regimes of electrolysis with various amounts of the electricity were analyzed by the scanning electron microscopy (SEM) technique. Irrespective of amount of passed electricity, 3D (three dimensional) pine-like dendrites with sharp tips were formed in the potentiostatic regime of electrolysis. On the other hand, the amount of passed electricity had a strong effect on the shape of the 3D pine-like dendrites formed in the galvanostatic regime of electrolysis. Dendrites with sharp tips were formed with smaller amount of passed electricity, while dendrites with globular tips were formed with larger amounts. The change in the shape of the galvanostatically synthesized 3D pine-like dendrites was explained by comparison with copper deposits obtained potentiostatically at overpotentials that corresponded to the final overpotentials during galvanostatic regime of electrolysis for the analyzed amounts of electricity. Based on the similarity of the obtained morphologies at the macro level, it was concluded that the overpotential plays a crucial role in the formation of the electrolytically synthesized dendrites and that the controlled conditions of electrolysis could represent a suitable way for a synthesis of spherical Cu particles by electrolysis.

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Preparation of Ultrafine Copper Powders with Controllable Size via Polyol Process with Sodium Hydroxide Addition

Cited by 18 publications

References 15 publications

Catalytic Reductive Degradation of Methyl Orange Using Air Resilient Copper Nanostructures

Catalytic Reductive Degradation of Methyl Orange Using Air Resilient Copper Nanostructures

Investigation of Electroactive and Antibacterial Properties of Polyethersulfone Membranes Blended With Copper Nanoparticles

Overpotential controls a morphology of electrolytically produced copper dendritic forms

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