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[주간세미나] 2015년 10월 19일
관리자 2015-10-07
  1072

<이영관교수 Lab.>


* 발표자 : 김원빈

* 제목 : Synthesis and characterization of copper sulfide dendrite

* 내용 : Here we demonstrate a novel strategy for the preparation of copper sulfide dendrite.  Copper dendrite as a template was electrodeposited on nickel foam by hydrogen gas bubbling. The surface of copper dendrite was homogenously sulfidized by vaporization of hydrogen sulfide from thiourea. The surface sulfidizing was controlled by the concentration of thiourea and reaction temperature and time. The composition and structure of copper sulfide and copper dendrite were investigated by scanning electron microscope, X-ray diffraction analysis, and X-ray photoelectron spectroscopy. Electrochemical properties of copper sulfide were confirmed by cyclic voltammetry. The performance of nickel sulfide as the electrode materials was determined by non-enzymatic glucose detection.



* 발표자 : 김수찬

* 제목 : Preparation and characterization of various morphology of nickel sulfide

* 내용 : Various morphology of nickel sulfide grown on Ni foam was prepared via a hydrothermal method in mix solvent of ethanol and water. The morphology of nickel sulphide was verified by the ratio of ethanol and water. When the ratio of ethanol was increased, nickel sulfide was grown like dendrite. The morphology and composition of various nickel sulfide were investigated by scanning electron microscope, X-ray diffraction analysis, and energy dispersive spectrometer. Electrochemical properties of nickel sulfide as a function of morphology were charaterized by cyclic voltammetry and electrochemical impedance spectroscopy. Accroding to the morphology of nickel sulfide, its surface area was changed and affected the electric conductivity and ion/electron transfer. The performance of nickel sulfide as the electrode materials was determined by non-enzymatic glucose detection. It is concluded that various morphology of nickel sulfide was well controlled by the kinds of solvent and affected the electrochemical properties.
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