摘要
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CeO_(2),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CeO_(2)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CeO_(2).光催化结果显示,4种不同形貌的CeO_(2)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CeO_(2)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,CeO_(2)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 CeO_(2)show regular morphologies and exhibit cubic fluorite structure.The crystallinity of CeO_(2)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 CeO_(2)is the highest,92.4%,followed by cylindrical CeO_(2)(71%),spherical particles CeO_(2)(64%)and fusiform CeO_(2)(56%).Different specific surface areas of CeO_(2)with different morphologies is the main factor deciding their photocatalytic activity.
作者
赵丹
梁飞雪
封瑞江
鞠佳
ZHAO Dan;LIANG Fei-xue;FENG Rui-jiang;JU Jia(College of Chemistry,Chemical Engineering and Environmental Engineering,Liaoning Stihua University,Fushun 113001,China)
出处
《现代化工》
CAS
CSCD
北大核心
2020年第S01期203-206,共4页
Modern Chemical Industry
关键词
水热法
二氧化铈
形貌
光催化
hydrothermal method
cerium oxide
morphologies
photocatalysis
