분무열분해공정에 의한 메조기공 알루미나 제조에 있어 Al 전구체 영향
(주)코리아스칼라
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- 2016.04.01
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- 2010.06
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서지정보
ㆍ발행기관 : 한국분말야금학회
ㆍ수록지정보 : 한국분말야금학회지 / 17권 / 3호
ㆍ저자명 : 김주현, 정경열, 박균영
영어 초록
Mesoporous alumina particles were prepared by spray pyrolysis using cetyltrimethyl-ammonium bromide (CTAB) as a structure directing agent and the effect of Al precursor types on the texture properties was studied using N2 adsorption isotherms, small-angle X-ray scattering (SAXS), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The surface area and the microstructure of alumina particles were significantly influenced by the Al precursor type. The largest BET surface area was obtained when Al chloride was used, whereas alumina particles prepared from Al acetate had the largest pore volume. According to small-angle X-ray scattering (SAXS) analysis, the alumina powders prepared using nitrate and acetate precursors had a clear single SAXS peak around 2θ = 1.0~1.5°, indicating that regular mesopores with sponge-like structure were produced. On the basis of TEM, SAXS, and N2 isotherm results, the chloride precursor was most profitable to obtain the largest surface area (265 m2/g), whereas, the nitrate precursor is useful for the preparation of non-hollow mesoporous alumina with regular pore size, maintaining high surface area (~233 m2/g).
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