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以硝酸铈、硝酸钕和尿素为原料,利用微波引诱燃烧法合成了多孔的Ce1-xNdxO2-y固溶体,并利用X-射线衍射(XRD)、激光拉曼光谱(Raman)、傅里叶变换红外光谱(FT-IR)、场致发射扫描电子显微镜(FE-SEM)和N2吸附-脱附等测试手段对产物进行了表征.XRD分析结果表明,Ce1-xNdxO2-y固溶体的粒径为40~60 nm,且所有产物为萤石结构;Raman分析结果证明Nd3+的掺杂会使固溶体产生氧空位,空位浓度随Nd3+掺杂量的提高而增加;FT-IR说明Ce─O键的吸收峰在1 400 cm-1左右,由于Nd3+的掺杂而使2 346 cm-1的吸收峰消失;SEM和N2吸附-脱附等温线证明Ce1-xNdxO2-y固溶体为多孔结构,且孔径分布在2~10 nm.
The porous Ce1-xNdxO2-y solid solution was synthesized by microwave induction combustion method using cerium nitrate, neodymium nitrate and urea as raw materials. XRD, Raman, Fourier transform infrared The products were characterized by FT-IR, field emission scanning electron microscopy (FE-SEM) and N2 adsorption-desorption.The results of XRD showed that the particle size of Ce1-xNdxO2-y solid solution was 40 ~ 60 nm, and all the products are fluorite structures. The results of Raman analysis show that the doping of Nd3 + causes the vacancies of oxygen vacancies in the solid solution and the vacancies increase with the increase of Nd3 + doping amount. FT- 1 400 cm-1, the absorption peak of 2 346 cm-1 disappeared due to the doping of Nd3 + ions. The SEM and N2 adsorption-desorption isotherm proved that the Ce1-xNdxO2-y solid solution has a porous structure with a pore size distribution of 2 ~ 10 nm.