Journal of Powder Materials (한국분말재료학회지)

The Korean Powder Metallurgy & Materials Institute (한국분말재료학회 (*구 분말야금학회))
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Synthesis and Characterization of Brilliant Yellow Color Pigments using α-FeOOH Nanorods

α-FeOOH 나노로드를 이용한 선명한 황색 안료 합성 연구

  • Yun, JiYeon (Engineering Ceramic Center, Korea Institute of Ceramic Engineering & Technology) ;
  • Yu, Ri (Engineering Ceramic Center, Korea Institute of Ceramic Engineering & Technology) ;
  • Kim, YooJin (Engineering Ceramic Center, Korea Institute of Ceramic Engineering & Technology)
  • 윤지연 (한국세라믹기술원 엔지니어링세라믹센터) ;
  • 유리 (한국세라믹기술원 엔지니어링세라믹센터) ;
  • 김유진 (한국세라믹기술원 엔지니어링세라믹센터)
  • Received : 2016.10.06
  • Accepted : 2016.12.07
  • Published : 2016.12.28
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Abstract

In this work, we synthesize brilliant yellow color ${\alpha}$-FeOOH by controlling the rod length and core-shell structure. The characteristics of ${\alpha}$-FeOOH nanorods are controlled by the reaction conditions. In particular, the length of the ${\alpha}$-FeOOH rods depends on the concentration of the raw materials, such as the alkali solution. The length of the nanorods is adjusted from 68 nm to 1435 nm. Their yellowness gradually increases, with the highest $b^*$ value of 57 based on the International Commission on Illumination (CIE) Lab system, by controlling the nanorod length. A high quality yellow color is obtained after formation of a silica coating on the ${\alpha}$-FeOOH structure. The morphology and the coloration of the nal products are investigated in detail by X-ray diffraction, scanning electron microscopy, UV-vis spectroscopy, and the CIE Lab color parameter measurements.

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