摘要
以硝酸铈和硝酸锆为原料,尿素为沉淀剂,CTAB为模板剂,采用均匀共沉淀法,制备出具有介孔结构的Ce_(1-x)Zr_xO_2(x=0.1~0.4)材料。利用XRD、Raman光谱、BET、SEM和TEM等测试方法,对合成试样的晶体结构、微观形貌、孔结构等性能进行表征。实验结果表明制备的Ce_(1-x)Zr_xO_2材料主晶相为立方面心CeO2结构。Ce_(1-x)Zr_xO_2材料随着Zr^(4+)掺量增大,晶胞参数a逐渐减小,且BET比表面积呈现出先增加后减小的趋势;Ce_(0.9)Zr_(0.1)O_2试样BET比表面积随反应溶液中CTAB浓度增加逐渐增大,随煅烧温度升高而减小。当Zr^(4+)摩尔掺量为10%,CTAB的浓度为0.055mol/L,煅烧温度为500℃时,制备的Ce_(0.9)Zr_(0.1)O_2试样为直径约200nm的球形颗粒,BET比表面积达到了94.82m^2/g。
The Ce1-xZrxO2(x=0.1-0.4)materials with mesoporous structure were prepared by homogeneous coprecipitation method,using cerium nitrate and zirconium nitrate as raw materials,urea as the precipitant and CTAB as the template.The crystal structure,micromorphology and pore structure of the samples were characterized by XRD,Raman spetra,BET,SEM and TEM.The results showed that the main crystalline phase of the prepared Ce1-x Zr x O2materials is of FCC structure.With the increasing of Zr4+doping content,the crystal cell parameter decreased gradually and the BET specific surface area showed a tendency to increase firstly and then decreased steadily.The BET specific surface area of the Ce0.9Zr0.1O2sample increased gradually with the increase of CTAB concentration,but reduces with the increase of calcination temperature.When the Zr4+molar content was10%,CTAB concentration was0.024mol/L and calcination temperature was500℃,the prepared Ce0.9Zr0.1O2particles were of spherical in shape and about200nm in diameter,and the BET specific surface area reaches to94.82m2/g.
作者
刘志刚
谢朋超
杨立荣
王广昊
封孝信
孙瑞靖
LIU Zhigang;XIE Pengchao;YANG Lirong;WANG Guanghao;FENG Xiaoxin;SUN Ruijing(Hebei Provincial Key Laboratory of Inorganic Nonmetallic Materials, College of Materials Science and Engineering, North China University of Science and Techonlogy, Tangshan 063210,China)
出处
《功能材料》
EI
CAS
CSCD
北大核心
2018年第3期3207-3212,共6页
Journal of Functional Materials
基金
河北省重点计划资助项目(16273706D)
河北省自然科学基金钢铁联合研究基金资助项目(E2015209317)
关键词
介孔结构
Ce1-xZrxO2
均匀共沉淀法
BET比表面积
孔结构
mesoporous structure
Ce 1- x Zr x O 2
homogeneous coprecipitation method
BET specific surface area
pore structure
