在離子液體中利用電化學法製備銅-錫合金的奈米結構

謝伊婷

doi:10.6844/NCKU.2013.01661

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在離子液體中利用電化學法製備銅-錫合金的奈米結構

Electrochemical preparation of Copper-Tin and Gold nanostructures from ionic liquids

謝伊婷 , Ph.D　　Advisor：孫亦文　　

英文 DOI： 10.6844/NCKU.2013.01661

離子液體；電沉積；奈米線；多孔性金；銅錫合金； ionic liquid ； electrodeposition ； nanowires ； nanoporous gold ； CuSn alloy

Abstract │ Reference (114) │ Altmetrics

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In this dissertation, we used electrochemical method to fabricate metal alloy nanostructures without using any template and additive. The contents include (1) electrodeposition of CuSn nanostructures in room temperature 1-ethyl-3-methylimidazolium dicyanamide (EMI-DCA) ionic liquid; (2) electrodeposition of Au nanowires and Au nanoporous wires in Lewis acidic ZnCl2-EMIC ionic liquid. 
One-step electrochemical synthesis of free standing hexagonal hollow CuSn tube arrays and hierarchical nanobrushes are achieved in a room temperature 1-ethyl-3-methylimidazolium dicyanamide ionic liquid containing different molar ratio of Cu(I) and Sn(II) at a low current density of -0.4 mA cm-2. Powder x-ray indicated that the hollow tube is referring to Cu10Sn3, and the nanobrush is referring Cu3Sn phase. This study also shows that morphologies of the deposits can be manipulated by the Cu(I)/Sn(II) concentrations in the solution, and thus, offers a method for reproducible preparation of the nanostructures. 
Direct template-free electrodeposition of AuZn nanowires were achieved on a tungsten substrate in a quiescent Lewis acidic ZnCl2–EMIC ionic liquid containing HAuCl4‧3H2O at 90℃ by applying an extremely large deposition overpotential. The content of the gold could be tuned by adding different concentration of Au(III) in the electrolyte. The Au nanoporous wires could be obtained by free corrosion in HCl solution and direct electrodeposition in a certain condition. The deposits were characterized by scanning electron microscopy, powder X-ray diffraction and transmission electron microscopy. Moreover, Au nanoporous wire electrodes show the significantly enhanced current for methanol, glycerol and glucose oxidation reactions.

Reference ( 114 ) 〈TOP〉

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[3] D. Wei, A. Ivaska: Applications of ionic liquids in electrochemical sensors, Analytica chimica acta, 607, 126-135 (2008).
連結：
[4] M. Armand, F. Endres, D.R. MacFarlane, H. Ohno, B. Scrosati: Ionic-liquid materials for the electrochemical challenges of the future, Nature materials, 8, 621-629 (2009).
連結：
[5] L.E. Barrosse-Antle, A.M. Bond, R.G. Compton, A.M. O'Mahony, E.I. Rogers, D.S. Silvester: Voltammetry in room temperature ionic liquids: comparisons and contrasts with conventional electrochemical solvents, Chemistry, an Asian journal, 5, 202-230 (2010).
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