本實驗首次成功利用水熱法合成摻雜 Ce 之碳點，所合成的樣品以 X 光繞射儀(X-ray diffraction, XRD)、穿透式電子顯微鏡(Transmission electron microscope, TEM)、掃描式電子顯微鏡(Scanning Electron Microscope, SEM)和 X 射線光電子能譜儀 (X-ray photoelectron spectroscopy, XPS)，進行結晶、粒徑、形貌、價態、結構變化以及化學結構之分析，光學性質的部份以紫外光/可見光吸收光譜 (UV-Vis spectrophotometer, UV-vis) 以及光激螢光光譜(Photoluminescence, PL)進行探討。 TEM 的結果顯示摻雜鈰之碳點尺寸約為 4.2nm，有明顯結晶相。 XPS 的結果發現碳點中確實有鈰的摻雜造成對化學結構的改變， UV-vis 的結果指出化學結構的變化會影響吸收範圍。 PL 的結果則顯示 Ce 摻入碳點後對於發光效果有所提升，特別是在紫外光波段。

This experiment is the first to successfully synthesize carbon dots doped with Ce by hydrothermal method. X-ray diffraction (XRD), transmission electron microscope (TEM), scanning electron microscope (SEM) and X-ray photoelectron spectroscopy (XPS) were utilized to characterize the crystalline structure, particle size, surface morphology, valence change, structural change and chemical structure identification. UV-Vis spectrophotometer (UV-vis) and photoluminescence (PL) were used to investigate the optical properties of Ce after doping with carbon dots. From the TEM and XPS results, it was confirmed that the carbon doped with Ce could be successfully synthesized by hydrothermal method. In the XPS results, it was found that the chemical structure was affected by the doping of Ce into carbon dots, and the optical properties were changed by the change of chemical structure in UV-vis. In the PL results, it was found that the doping of Ce with carbon dots improved the luminescence effect.

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