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분무열분해공정에 의한 메조기공 알루미나 제조에 있어 Al 전구체 영향 KCI 등재

Effect of Al Precursor Type on Mesoporous Alumina Particles Prepared by Spray Pyrolysis

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한국분말야금학회지 (Journal of Korean Powder Metallurgy Institute)
한국분말재료학회(구 한국분말야금학회) (Korean Powder Metallurgy Institute)
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).

저자
  • 김주현 | Kim Joo-Hyun
  • 정경열 | Jung Kyeong-Youl
  • 박균영 | Park Kyun-Young