Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Synthesis of Spindle Shape α-FeOOH Nanoparticle from Ferrous(II) Sulfate Salt

황산 제1철을 이용한 방추형 괴타이트 나노 입자의 합성

  • Han, Yang-Su (Nanospace Co. Ltd. Korea Institute of Ceramic Engineering, Business Incubator) ;
  • You, Hee-Joun (Korea Institute of Ceramic Engineering and Technology (KICET)) ;
  • Moon, Ji-Woong (Korea Institute of Ceramic Engineering and Technology (KICET)) ;
  • Oh, You-Keun (Korea Institute of Ceramic Engineering and Technology (KICET))
  • Published : 2005.11.01
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Abstract

A wet-chemical route was utilized to obtain nanosized crystalline goethite ($\alpha$-FeOOH) particle, which was known as an oxidation catalyst in reducing carbon monoxide (CO) and dioxine during incineration. A cost-effective $FeSO_4{\cdot}7H_2O$ was used as starting raw material and a successive process of hydrolysis-oxidation was utilized as synthetic method. The effects of the initial $Fe^{2+}$ concentration, hydrolysis time and oxidation period on the crystalline phase and particle characteristics were systematically investigated by X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM) and BET analyses. It was found that the spindle-shaped crystalline $\alpha$-FeOOH particle with the width of 70 nm and the length of 200 nm could be obtained successfully when the initial concentration of 1.5 M, hydrolysis time of 4h, and oxidation period of 10 h, respectively. In addition, it was observed that the spindle-shaped $\alpha$-FeOOH particle consisted of nano-sized primary crystallites of $30\~50\;nm$, which were de-agglomerated into individual particle and successively re­agglomerated into spherical or irregular-shaped agglomerates beyond certain periods in the hydrolysis and oxidation process.

Keywords

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  1. Synthesis and Shape Control of Goethite Nano Particles vol.29, pp.9, 2016, https://doi.org/10.4313/JKEM.2016.29.9.552