以硝酸铈为铈源，通过水热法合成球形颗粒状、柱形、菜花形和梭形4种不同形貌的CeO₂，对催化剂形貌、晶形、光催化性能等方面进行研究。结果显示，4种CeO₂形貌规整，均为立方萤石结构，以尿素为沉淀剂制备的CeO₂的结晶度要强于以氢氧化钠为沉淀剂制备的CeO₂。光催化结果显示，4种不同形貌的CeO₂对盐基品红降解率的大小顺序为菜花形（92.4%）>柱形（71%）>球形颗粒（64%）>梭形（56%），不同形貌CeO₂的比表面积是影响光催化活性的主要因素。

Cerium nitrate is used as the source of cerium,CeO₂ respectively with spherical,columnar,cauliflower and fusiform shapes are synthesized by hydrothermal method.Morphology,crystal form and photocatalytic performance of the synthesized catalysts are studied.It is indicated that all four kinds of CeO₂ show regular morphologies and exhibit cubic fluorite structure.The crystallinity of CeO₂ prepared with urea as precipitant is stronger than that prepared with sodium hydroxide as precipitant.Photocatalysis results show that the degradation rates of salt-based magenta by cauliflower CeO₂ is the highest,92.4%,followed by cylindrical CeO₂ (71%),spherical particles CeO₂ (64%) and fusiform CeO₂ (56%).Different specific surface areas of CeO₂ with different morphologies is the main factor deciding their photocatalytic activity.

赵丹(1993-),女,硕士生,研究方向为铈基纳米材料的制备与应用