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Vol.53, No.2, 110 ~ 116, 2015
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| Title |
| Tunable Structural Design and Thermal Characteristics of SiO2 Hybrid on Cu2O Pigment via Dual-Effect of NH4OH Catalyst |
| 유리 Ri Yu , 윤지연 Ji Yeon Yun , 양희승 Hee Seung Yang , 피재환 Jae Hwan Pee , 김유진 Yoo Jin Kim |
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| Abstract |
| This paper reports the tunable structural design and thermal characteristics of a SiO2 layer on Cu2O pigment via a dual-effect of NH4OH catalyst. We prepared octahedron Cu2O 200~300 nm in size and successfully synthesized a core-shell Cu2O@SiO2 structure using a modified Stober method in which the NH4OH concentration was adjusted. The NH4OH solution dipping time was controlled such that the Cu2O core was generated with a yolk-shell and a hollow-shell. The silica-coated Cu2O raw materials were calcined at various temperatures (150~500 ℃). The thermal and color effects of the silica on the Cu2O were characterized by scanning electron microscopy, CIE L*a*b* color parameter measurements, transmission electron microscopy, and X-ray diffraction. |
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| Key Words |
| Cu2O, nanostructured materials, surface modification, phase transformation, transmission electron microscopy (TEM) |
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