本研究利用噴霧熱裂解方式形成二氧化鈰中空球，並利用二氧化鈰中空球在特定濃度之硝酸溶液震盪效應來表面改質，目的為改變樣品之表面缺陷濃度和缺陷分佈，接著使用穿透式電子顯微鏡、X光吸收光譜、震動樣品磁化儀及界達電位分析儀來闡述樣品缺陷、磁性、界達電位之關係。
首先討論中空二氧化鈰經過300℃退火後，根據SEM圖計算粒徑變大且粒徑分佈範圍變廣，且在TEM影像下看到殼層晶粒成長的現象，磁化量則呈現一致的數值為0.0005emu/g。討論退火前退火後二氧化鈰具有不同表面結構在硝酸溶液震盪下之結果，發現兩種表面在硝酸溶液震盪下均會導致中空球表面皺褶、粗糙的產生，殼層厚度會受到溶解導致變薄，退火前二氧化鈰在硝酸溶液震盪下飽和磁化量從0.000538上升至0.006，退火後二氧化鈰在硝酸溶液震盪下飽和磁化量從0.0006上升至0.00514，皆比初始上升了10倍，退火前二氧化鈰在硝酸溶液震盪下界達電位從-48.8下降至-28.4，退火後二氧化鈰在硝酸溶液震盪下界達電位從-55.05下降至-28.2，根據先前實驗的結果探討表面Ce3+含量、飽和磁化量與界達電位之研究可以得到界達電位下降意謂著表面Ce3+含量上升。根據以上結果可以證實本實驗成功利用硝酸溶液震盪效應讓中空二氧化鈰表面Ce3+含量上升，擁有更大之磁化量。此結果可以成為後續以本質缺陷的方式誘發鐵磁性之參考。

This study used spray pyrolysis to form the CeO2 hollow sphere and used this CeO2 hollow sphere in the specific concentration of nitric acid solution to change its surface property. The purpose of this study was trying to change the defect concentration of the surface and the defect distribution. TEM、X-ray absorption spectroscopy、VSM and zeta potential analysis are used to illustrate the relationship between defect、magnetism and zeta-potential.
Firstly, the CeO2 hollow sphere after annealing at 3000C. According to the SEM image, the particle size and the range of distribution became larger, the grain growth of the shell was observed under the TEM image, the amount of magnetization is consistent with a value of 0.0005emu/g.
The results of cerium oxide after annealing and before annealing have different surface structures under the shock of nitric acid solution. It is found that both surfaces will cause wrinkles and roughness of hollow spheres under the shock of nitric acid solution, and the thickness of shell will be affected by dissolution. Before the annealing, the saturation magnetization of cerium oxide increased from 0.000538 to 0.006 under the shock of nitric acid solution. After annealing, the saturation magnetization of cerium oxide increased from 0.0006 to 0.00514 under the shock of nitric acid solution. It is 10 times higher than the initial. Before annealing, the Zeta potential of cerium oxide decreased from -48.8 to -28.4 under the shock of nitric acid solution. After annealing, the Zeta potential of cerium oxide decreased from -55.05 to -28.2 under the shock of nitric acid solution. According to the results of previous experiments, the study of surface Ce3+ concentration, saturation magnetization and Zeta potential can be used to obtain which a decrease in the Zeta potential, means that the surface Ce3+ content rises.
According to the above results, it can be confirmed that the experiment successfully uses the shock effect of the nitric acid solution to increase the content of Ce3+ on the surface of the hollow ceria, and has a larger magnetization. This result can be a reference for subsequent induction of ferromagnetism in a manner that is inherently deficient.

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