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    题名: 聚苯胺載體上金奈米粒子之催化因素影響研究;he influence of the activity of the nanoparticle on polyaniline substrate
    作者: 林采葳;Cai-Wei LIN
    贡献者: 化學研究所
    关键词: 苯甲醇;聚苯胺;金奈米粒子;benzyl alcohol;polyaniline;gold nanoparticle
    日期: 2008-06-19
    上传时间: 2009-09-22 10:19:46 (UTC+8)
    出版者: 國立中央大學圖書館
    摘要: 在本論文研究中,我們主要以PET(polyethylene terephthalate)塑膠片及ITO(indium tin oxide)導電玻璃合成出不同表面型態聚苯胺(polyaniline, PANI)膜作為載體,利用聚苯胺的氧化還原特性,將三氯化金(AuCl3)的水(H2O)或氯仿(CHCl3)溶液中之金離子還原製備成金奈米粒子沉積於聚苯胺膜上。利用此沈積於聚苯胺膜上的金奈米粒子作為催化劑,催化苯甲醇(benzyl alcohol, C6H5CH2OH)氧化成苯甲醛(benzaldehyde, C6H5CHO) 及苯甲酸(benzoic acid, C6H5COOH)的反應,利用高效液相層析儀(high performance liquid chromatography)進行催化氧化反應之定量分析。另外並將利用PET和ITO作為載體,再使用AuCl3水溶液或AuCl3氯仿溶液直接沉積金粒子於PET和ITO上所製備出之金催化劑,與金奈米粒子/聚苯胺催化劑比較催化活性,探討不同載體材料、聚苯胺表面型態及AuCl3溶液所使用之溶劑三種條件對金粒子催化劑的催化活性影響。利用拉曼光譜(Raman spectroscopy)、紫外光/可見光光譜(UV-Vis spectroscopy)、掃描式電子顯微鏡(scanning electron microscopy)、穿透式電子顯微鏡(transmission electron microscopy )及X-光小角度散射(small angle X-ray scattering)等技術來鑑定金催化劑的特性。 Gold (Au) nanoparticles prepared using two different solvents (H2O and CHCl3) were deposited on polyaniline (PANI) thin films as the catalyst in the oxidation of benzyl alcohol (C6H5CH2OH). The oxidation products, benzaldehyde (C6H5CHO) and benzoic acid (C6H5COOH), were quantitatively analyzed using the high performance liquid chromatography (HPLC). Different substrates such as indium tin oxide (ITO) conductive glass and polyethylene terephthalate (PET) were also used for elucidating the substrate effect on the morphology of deposited PANI films and the Au nanoparticles formed whereon. The Au/PANI thin films were characterized by ultraviolet-visible spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), and small angle X-ray scattering (SAXS). The Raman spectra were also acquired and show differences in the degrees of oxidation/reduction of the PANI thin films in the oxidation reaction. Interestingly, the Au nanoparticles prepared by different solvents exhibit distinctively different catalytic activities, while the morphology effects of PANI on different substrates show little impact on the catalysis.
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