ZnO를 담지한 TMA-A 제올라이트 나노결정의 제조
Fabrication of ZnO incorporated TMA-A zeolite nanocrystals
2
조회
0
다운로드
0
인용
0
참고문헌
초록
수열합성법으로 합성 제조한 TMA-A 제올라이트 내부에 이온교환법을 이용하여 나노사이즈의 ZnO 결정을 성 공적으로 담지하였다. TMA-A 제올라이트의 최적 합성 조성비로는 Al(i-pro)3 : 2.2 TEOS : 2.4 TMAOH : 0.3 NaOH : 200 H2O으로 된 용액이었다. ZnO를 담지시킨 TMA-A 제올라이트의 합성을 위하여 0.3 g의 TMA-A 제올라이트와 5 mol의 ZnCl2 solution을 사용하였다. 각각의 시료를 혼합, 교반, 원심분리, 건조의 과정을 거쳐서 준비한 ZnO를 담지시킨 TMA-A 제올라이트 precursor를 400~600 o C에서 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 형상 이나 크기를 scanning electron microscopy(SEM), transmission electron microscopy(TEM) 및 입도분석을 통하여 관찰하였다.e
Abstract
Nano-sized ZnO crystals were successfully incorporated using ion exchange method in TMA-A zeolite synthesizedby the hydrothermal method. The optimal composition for the synthesis of TMA-A zeolite was resulted in a solution ofAl(i-pro)3 : 2.2 TEOS : 2.4 TMAOH : 0.3 NaOH : 200 H2O. 0.3 g of TMA-A zeolite and 5 mol of ZnCl2 solution were em-from the process of mixing, stirring, centrifugal separation and drying, were calcined at temperatures from 400 to 60oCfor 3 h. The crystalization proces of ZnO incorporated TMA-A zeolite was analyzed by X-ray diffraction (XRD). TheBrunaur-Emett-Teller (BET) surface area of the ZnO incorporated TMA-A zeolite was measured. Subsequently, the morphologyand the particle size depending on the temperature and time were observed using scanning electron microscopy(SEM),transmission electron microscopy(TEM) and particle size analyzer.Key words ZnO, TMA-A zeolite, Nanocrystal, Incorporation, Hydrothermal, Ion exchangeZnO. ... TMA-A ..... ..... ....... ...†.. ........ ...... , .. , 356-706(2007. 10. 9. .. )(2007. 12. 10. .... )
참고문헌 (13)
- "Identification of the transition responsible for the visible emission in ZnO using quantum size effects", 90, pp.123~ (2000)
- "Low temperature synthesis of ZnO nanopowders by the polymerized complex method", 12(5), pp.229~ (2002)
- "The synthesis and mechanical properties of large zeolite sodalite single crystals", 158, pp.231~ (2005)
- "Phase selection of FAU and LTA zeolites by controlling synthesis parameters", 89, pp.227~ (2006)
- "Preparation of inner-side tubular zeolite NaA membranes in a semi-continuous synthesis system", 278, pp.401~ (2006)
- "Crystal growing and reaction kinetic of large NaX zeolite crystals", 27, pp.581~ (2007)
- "Synthesis and characterization of Se nano-structures inside porous zeolite crystals", 226, pp.36~ (2004)
- "Desalination", 200, pp.68~ (2006)
- "Preparation of inner-side tubular zeolite NaA membranes in a semi-continuous synthesis system", 278, pp.401~ (2006)
- "Polymerized organic.inorganic synthesis of nanocrystalline zinc oxide", 105, pp.354~ (2007)
- "The kinetics of the hydrothermal growth of ZnO nanostructures", 515, pp.8679~ (2007)
- "Characterization of zinc oxide nanoparticles encapsulated into zeolite-Y: An in-situ combined X-ray diffraction, XAFS,and SAXS study", 199, pp.499~ (2003)
- "“Optical properties of zinc oxide clusters encapsulated in a zeolite host”", pp.1003~ (1992)