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논문 기본 정보

자료유형
학술대회자료
저자정보
정재욱 (부산대학교) 이동근 (부산대학교)
저널정보
대한기계학회 대한기계학회 춘추학술대회 대한기계학회 2008년도 마이크로/나노공학부문 춘계학술대회 강연 및 논문집
발행연도
2008.5
수록면
199 - 206 (8page)

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Recently nitrogen oxides (NOx) which have been considered one of the most serious and environmentally-regulated species have been of increasing interest over the past decades. In this work, we performed one-step synthesis of platinum-silica nano-composite catalyst and tested the catalytic particles for hydrocarbon selective catalytic reduction (HC-SCR). The Platinum-silica catalysts were prepared by aerosol-gel method using tetraethylorthosilicate (TEOS) and Platinum acetylacetonate (Pt(acac)₂). This aerosol-based method has several advantages over liquid phase methods, e.g., easier scale up to large scale production and relatively easy control of particle evolution. Characteristics of the catalytic particles are attempted to control by changing reaction temperature, reaction time and Pt-to-Si molar ratio of the mixed precursors. A series of such experiments revealed that size, morphology and dispersion of Pt dots on SiO2 were controllable. At the condition of 600℃ of reaction temperature, 4 hour pre-sol-gel reaction prior to atomization, 1 : 0.02 of molar ratio between TEOS and Pt(acac)₂), we obtained best-dispersed Pt dots of about 3㎚ on silica particles. TEM (Transmission Electron Microscope) is used for the characterization of their size, morphology and composition. XPS (X-Ray photoelectron spectroscopy) confirms that platinum exists primarily in its metallic state on the functionalized silica surfaces. The actual loading of Pt-SiO2 is measured using inductively coupled plasma (ICP). In addition, the samples are also characterized by UV (Ultraviolet)-Visible spectroscopy, FT-IR (Fourier transformation infrared spectroscopy) and XRD (X-Ray Diffraction).

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Abstract
1. 서론
2. 실험방법
3. 결과 및 토의
4. 결론
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UCI(KEPA) : I410-ECN-0101-2009-550-018644320