将2.6 g六水硝酸铈(Ce(NO₃)₃•6H₂O)溶解在一定量的实验室自制的去离子水中，然后加入氨水(NH₃•6H₂O)后_，再加入1.4 g十六烷基三甲基溴化铵(CTAB)，并伴随着搅拌器搅拌均匀，以获得胶体状沉淀。最后将所得胶体转移到100 mL的带有聚四氟乙烯内衬的高压釜中，调节水热箱温度，控制水热反应温度为100 ℃，反应时间控制为8 h，将所得产物通过离心机分离后用水以及无水乙醇反复洗涤，将得到的白色粉末在真空干燥箱中干燥12 h，放入真空管式高温炉中800 ℃煅烧4 h，即可得到纳米球形氧化铈。XRD试验电压为40 KV，步长为8°/min，测试范围为10-90°。用SIRION200场发射扫描电子显微镜(FESEM)观察了其显微结构和粒径。

Dissolve 2.6 g of cerium nitrate hexahydrate (Ce(NO₃)₃•6H₂O) in a certain amount of laboratory homemade deionized water, then add ammonia (NH₃•6H₂O) followed by 1.4 g of cetyltrimethylammonium bromide (CTAB) and stir well accompanied by a stirrer to obtain a colloidal precipitate . Finally, the obtained colloid was transferred to a 100 mL autoclave with PTFE liner, and the temperature of the hydrothermal chamber was adjusted to control the hydrothermal reaction temperature of 100 ℃ and the reaction time of 8 h. The obtained product was separated by centrifuge and washed repeatedly with water and anhydrous ethanol, and the obtained white powder was dried in a vacuum drying oven for 12 h and calcined in a vacuum tube furnace at 800 ℃ for 4 h. The XRD test voltage was 40 KV, the step size was 8°/min, and the test range was 10-90°. The microstructure and particle size were observed with a SIRION 200 field emission scanning electron microscope (FESEM).