Cu/Cu2O/CuO nanoparticles: Novel synthesis by exploding wire technique and extensive characterization

Sahai, Anshuman; Goswami, Navendu; Kaushik, S. D.; Tripathi, S.

doi:10.1016/j.apsusc.2016.09.005

Cited by 189 publications

(89 citation statements)

References 43 publications

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“…For the sample grown at 0.02, the presence of Cu particles could not be ascertained from µRS due to instrumental limitations for metals because they can exhibit surface plasmon resonance (SPR). For metals, local SPR is responsible for field enhancement and therefore leads to surface-enhanced processes, which are only visible using surface enhanced Raman spectroscopy that is helpful for characterizing metallic samples [28]. Correspondingly, the resistivity initially decreases and then increases as the P O 2 increases, with a minimum value of 13.4 Ω·cm obtained at 0.09 Pa.…”

Section: Resultsmentioning

confidence: 99%

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Cu2O epitaxial films with domain structures prepared on Y-stabilized ZrO2 substrates by pulsed laser deposition

Liu

et al. 2017

Ceramics International

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Section: Resultsmentioning

confidence: 99%

“…crystal [28,29], respectively. The most intense peak at 221 cm -1 is the second order overtone of Cu 2 O, corresponding to 2Γ "# $ mode [28,29]. The other two peaks at 416…”

Section: Methodsmentioning

confidence: 99%

Cu2O epitaxial films with domain structures prepared on Y-stabilized ZrO2 substrates by pulsed laser deposition

Liu

et al. 2017

Ceramics International

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“…[1]. Various core-shell nanostructures have been obtained previously by Kirkendall effect and Ostwald ripening process [2,3]. The elemental Cu as a shell has been reported to play a crucial role in many reactions due to its high activity.…”

Section: Extended Abstractmentioning

confidence: 99%

“…The structural and optical studies showed the nanoparticles prepared at room temperature is phase pure crystalline Cu2O material with band gap energy of 2.08 eV. [2,3]. The elemental Cu as a shell has been reported to play a crucial role in many reactions due to its high activity.…”

mentioning

confidence: 99%

Preparation of Cu2O and Cu2O@Cu Core-Shell Nanostructures by a Simple Chemical Technique

Al-Gaashani¹,

Hossain²,

Alharbi³

et al. 2017

International Conference of Theoretical and Applied Nanoscience and Nanotechnology

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Extended AbstractCuprous oxide (Cu2O) and core-shell Cu2O@Cu nanostructures have been synthesized by a facile wet-chemical approach using aqueous solution of copper (II) sulfate (CuSO4), L-ascorbic acid (C6H8O6) and potassium hydroxide (KOH). The short synthesis time of one minute and the effects of solvent temperature on the crystal structure, morphology and optical properties of the synthesized nanostructures have been studied. The structural and optical studies showed the nanoparticles prepared at room temperature is phase pure crystalline Cu2O material with band gap energy of 2.08 eV. [2,3]. The elemental Cu as a shell has been reported to play a crucial role in many reactions due to its high activity.In this work, a simple, facile approach was used to prepare core-shell Cu2O@Cu nanostructures in one minute. To the best of our knowledge, such method has not yet been reported and could be used to synthesize other core-shell materials.The morphological analysis showed the solvent temperature-dependent core-shell features of the synthesized Cu2O@Cu core-shell nanoparticles with elliptical and oval shapes, and different sizes. The structural and composition analyses revealed the presence of pure phase Cu2O (at RT), and Cu2O@Cu with increased amount of Cu content with increase of the solvent temperature.

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“…This includes catalysis (Wang et al, 2016), magnetic materials (Yin et al, 2010), solar energy conversion (Sahai et al, 2016), sensors (Shi et al, 2016), material additives (Jiao et al, 2016), negative electrode material of lithium ion batteries (Poizot et al, 2000), microelectronics (Li and Chen, 2014), and optoelectronics (Fan et al, 2014). In the past few years, to obtain copper products with high added value from waste PCBs, different methods were proposed by several research groups for the preparation of ultrafine copper materials.…”

Section: Introductionmentioning

confidence: 99%

A novel recovery method of copper from waste printed circuit boards by supercritical methanol process: Preparation of ultrafine copper materials

Xiu

Weng

et al. 2017

Waste Management

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a b s t r a c tIn this study, supercritical methanol (SCM) process was successfully used for the preparation of ultrafine copper materials from waste printed circuit boards (PCBs) after nitric acid pretreatment. Waste PCBs were pretreated twice in nitric acid. Sn and Pb were recovered by the first nitric acid pretreatment. The leach liquor with a high concentration of copper ions after the second nitric acid leaching was subjected to SCM process. The mixture of Cu and Cu 2 O with poor uniformity of particle size was formed due to the effect of ferric iron contained in the leach liquor of waste PCBs, while more uniform and spherical Cu particles with high monodispersity and smaller size could be prepared after the removal of Fe. The size of Cu particles increased obviously with the decline of SCM temperature, and particles became highly aggregated when the reaction temperature decreased to 300°C. The size of Cu particles decreased markedly with the decrease of initial concentration of copper ion in the leach liquor of waste PCBs. It is believed that the process developed in this study is simple and practical for the preparation of ultrafine copper materials from waste PCBs with the aim of recycling these waste resources as a high value-added product.

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Cu/Cu2O/CuO nanoparticles: Novel synthesis by exploding wire technique and extensive characterization

Cited by 189 publications

References 43 publications

Cu2O epitaxial films with domain structures prepared on Y-stabilized ZrO2 substrates by pulsed laser deposition

Cu2O epitaxial films with domain structures prepared on Y-stabilized ZrO2 substrates by pulsed laser deposition

Preparation of Cu2O and Cu2O@Cu Core-Shell Nanostructures by a Simple Chemical Technique

A novel recovery method of copper from waste printed circuit boards by supercritical methanol process: Preparation of ultrafine copper materials

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