Journal of the Korean Crystal Growth and Crystal Technology (한국결정성장학회지)

The Korea Association of Crystal Growth (한국결정성장학회)
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Fabrication of ZnO incorporated TMA-A zeolite nanocrystals

ZnO를 담지한 TMA-A 제올라이트 나노결정의 제조

  • Lee, Seok-Ju (Department of Advanced Materials Science & Engineering, Hanseo University) ;
  • Lim, Chang-Sung (Department of Advanced Materials Science & Engineering, Hanseo University) ;
  • Kim, Ik-Jin (Department of Advanced Materials Science & Engineering, Hanseo University)
  • 이석주 (한서대학교 신소재공학과) ;
  • 임창성 (한서대학교 신소재공학과) ;
  • 김익진 (한서대학교 신소재공학과)
  • Published : 2007.12.31
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Abstract

Nano-sized ZnO crystals were successfully incorporated using ion exchange method in TMA-A zeolite synthesized by the hydrothermal method. The optimal composition for the synthesis of TMA-A zeolite was resulted in a solution of $Al(i-pro)_3$:2.2 TEOS:2.4 TMAOH:0.3 NaOH:200 $H_2O$. 0.3g of TMA-A zeolite and 5mol of $ZnCl_2$ solution were employed for the preparation of ZnO incorporated TMA-A zeolite. The ZnO incorporated TMA-A zeolite precursors, prepared from the process of mixing, stirring, centrifugal separation and drying, were calcined at temperatures from 400 to $600^{\circ}C$ for 3 h. The crystallization process of ZnO incorporated TMA-A zeolite was analyzed by X-ray diffraction (XRD). The Brunaur-Emett-Teller (BET) surface area of the ZnO incorporated TMA-A zeolite was measured. Subsequently, the morphology and the particle size depending on the temperature and time were observed using scanning electron microscopy(SEM), transmission electron microscopy(TEM) and particle size analyzer.

수열합성법으로 합성 제조한 TMA-A 제올라이트 내부에 이온교환법을 이용하여 나노사이즈의 ZnO 결정을 성공적으로 담지하였다. TMA-A 제올라이트의 최적 합성 조성비로는 $Al(i-pro)_3$:2.2 TEOS:2.4 TMAOH:0.3 NaOH:200 $H_2O$으로 된 용액이었다. ZnO를 담지시킨 TMA-A 제올라이트의 합성을 위하여 0.3g의 TMA-A 제올라이트와 5mol의 $ZnCl_2$ solution을 사용하였다. 각각의 시료를 혼합, 교반, 원심분리, 건조의 과정을 거쳐서 준비한 ZnO를 담지시킨 TMA-A 제올라이트 precursor를 $400{\sim}600^{\circ}C$에서 3시간 동안 열처리하였다. TMA-A 제올라이트의 결정화 과정을 X-ray diffraction (XRD)을 이용하여 분석하였으며, Brunaur-Emett-Teller(BET) 비표면적을 측정하였다. 또한, 온도와 시간에 따른 입자의 형상이나 크기를 scanning electron microscopy(SEM), transmission electron microscopy(TEM) 및 입도분석을 통하여 관찰하였다.

Keywords

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