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      Fabrication of nano-sized copper powders in liquid media via high-energy electrical explosion method: Use of high purity copper recovered from waste jelly-filled cable as raw material Translated title: Herstellung von nanoskaligem Kupferpulver in flüssigen Medien mittels eines hochenergetischen elektrischen Explosionsverfahrens: Verwendung von hochreinem Kupfer aus Gel-gefüllten Abfallkabeln

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          Abstract

          A novel process for fabrication of nano-sized copper powders in organic oleic acid medium was developed employing a high-energy electrical explosion method. Formation of copper oxides was inhibited by the oleic acid medium during the electrical explosion of copper wires recovered from waste jelly-filled cable as a raw material for synthesis of nano-colloids and final dried nano-sized copper powders. High voltage of 320 V was repeatedly applied between the two horizontal electrodes for 3000 electrical explosions across the horizontal electrodes assembly. The copper powders were finally recovered via dispersion of the colloid by ultra-sonification and subsequent drying in an oven at 60 °C for 1 h and 5 h, respectively. The copper powders thus fabricated were analyzed using FESEM, BET surface area analyzer, TEM and elemental analyzer for determination of morphology, porosity and elemental purity. All of them turned out to be superior compared to similarly produced copper nano-sized powders in deionized water or ethyl alcohol (EtOH) media.

          Kurzfassung

          Ein neuer Prozess für die Herstellung von nano-skaligen Kupferpulvern in einem organischen Ölsäuremedium wurde entwickelt, in dem ein hochenergetisches elektrisches Explosionsverfahren angewandt wurde. Während der elektrischen Explosion der Kupferdrähte, die aus Gel-gefüllten Abfallkabeln als Rohmaterial für die Synthese von Nano-Kolloiden und endgetrockneten nanoskaligen Kupferpulvern dienten, wurde die Bildung von Kupferoxiden durch das Ölsäure-Medium verhindert. Hierbei wurde eine hohe Spannung von 320 V wiederholt über die zwei horizontal angebrachten Elektroden für 3000 elektrische Explosionen angelegt. Die Kupferpulver wurden schließlich mittels Dispersion des Kolloides durch Ultraschallbehandlung gewonnen und entsprechend in einem Ofen bei 60 °C über jeweils 1 h und 5 h getrocknet. Die so hergestellten Kupferpulver wurden mittels FESEM, einem BET Oberflächenanalysator, TEM und einem Elementanalysator untersucht und zwar hinsichtlich der Morphologie, der Porösität, der Elementreinheit, die sich alle als besser gegenüber ähnlich hergestellten nanoskaligen Kupferpulvern in deionisiertem Wasser oder Ethanol-haltigen Medien herausstellten.

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          Synthesis of monodisperse spherical nanocrystals.

          Much progress has been made over the past ten years on the synthesis of monodisperse spherical nanocrystals. Mechanistic studies have shown that monodisperse nanocrystals are produced when the burst of nucleation that enables separation of the nucleation and growth processes is combined with the subsequent diffusion-controlled growth process through which the crystal size is determined. Several chemical methods have been used to synthesize uniform nanocrystals of metals, metal oxides, and metal chalcogenides. Monodisperse nanocrystals of CdSe, Co, and other materials have been generated in surfactant solution by nucleation induced at high temperature, and subsequent aging and size selection. Monodisperse nanocrystals of many metals and metal oxides, including magnetic ferrites, have been synthesized directly by thermal decomposition of metal-surfactant complexes prepared from the metal precursors and surfactants. Nonhydrolytic sol-gel reactions have been used to synthesize various transition-metal-oxide nanocrystals. Monodisperse gold nanocrystals have been obtained from polydisperse samples by digestive-ripening processes. Uniform-sized nanocrystals of gold, silver, platinum, and palladium have been synthesized by polyol processes in which metal salts are reduced by alcohols in the presence of appropriate surfactants.
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            Novel Antimony/Aluminum/Carbon Nanocomposite for High-Performance Rechargeable Lithium Batteries

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              Facile fabrication of ultrasmall and uniform copper nanoparticles

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                Author and article information

                Journal
                mp
                Materials Testing
                Carl Hanser Verlag
                0025-5300
                2195-8572
                2 February 2016
                : 58
                : 2
                : 161-164
                Affiliations
                1 Yongin, Korea
                Author notes
                [§ ] Correspondence Address, Dr. Sungkyu Lee, Principal Engineer, Plant Engineering Center, Institute for Advanced Engineering (IAE), 633-2 Goan-ri, Baegam-myeon, Cheoin-gu, Yongin-si, Gyeonggi-do, 449-863, Korea. E-mail: sklee@ 123456ajou.ac.kr

                Sungkyu Lee, born 1959, received his BSc from Hanyang University of Seoul, Korea, in 1982. He graduated with an MSc and PhD in Materials Science and Engineering from the University of Minnesota in Twin Cities, USA, in 1991 and 1994, respectively. Now, he is working as a principal engineer at the Plant Engineering Center, Institute for Advanced Engineering, Yongin-si, Gyeonggi-do, Korea.

                Dukhee Lee, born 1986, received his BSc and MSc in Materials Science and Engineering at Dankook University, Cheonan-si, Korea and at Ajou University, Suwon, Korea, in 2012 and 2014, respectively. Now he is working as a researcher at the Advanced Materials and Processing Center, Institute for Advanced Engineering, Yongin-si, Gyeonggi-do, Korea.

                Soo-Young Lee, born 1979, received his BSc and MSc from the School of Energy, Materials and Chemical Engineering of the Korea University of Technology and Education, Cheonan-si, Korea and in Materials Science and Engineering at Yonsei University, Seoul, Korea, in 2003 and 2011, respectively. Now he is working as a senior researcher at the Advanced Materials and Processing Center, Institute for Advanced Engineering, Yongin-si, Gyeonggi-do, Korea.

                Sung-Su Cho, born 1973, received his BSc from Kyonggi University, Suwon, Korea, in 2005. He graduated as MSc in Energy Systems Research at Ajou University, Suwon, Korea, in 2007. Now he is working as a principal engineer at the Advanced Materials and Processing Center, Institute for Advanced Engineering, Yongin-si, Gyeonggi-do, Korea. In addition, he is currently in the PhD program in the Energy Systems Division, Ajou University, Suwon-si, Korea.

                Sunghyun Uhm, born 1973, received his BSc, MSc and PhD in Chemical Engineering from Inha University, Incheon, Korea, in 1996, 1998 and 2008, respectively. Now he is working as a principal engineer at the Advanced Materials and Processing Center, Institute for Advanced Engineering, Yongin-si, Gyeonggi-do, Korea.

                Article
                MP110830
                10.3139/120.110830
                6dd9c33d-51bf-49a7-b786-85ed0ffaa345
                © 2016, Carl Hanser Verlag, München
                History
                Page count
                References: 6, Pages: 4
                Categories
                Fachbeiträge/Technical Contributions

                Materials technology,Materials characterization,Materials science
                Materials technology, Materials characterization, Materials science

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