Pure and manganese-doped ceria nanopowders were prepared by the sol–gel method using cerium acetylacetonate hydrate and manganese acetylacetonate as precursors, while methanol and ethylene glycol were used as a double solvent. The prepared materials have been characterized by X-ray diffraction, Fourier transformed infrared spectroscopy, differential thermal and thermogravimetric analysis, scanning electron microscope, atomic force microscope, and N₂ adsorption/desorption isotherms. In the course of synthesis and aging, hydrolysis of the precursors and gel formation were achieved. The process was more advanced in the doped samples. Grain growth kinetics pointed out that manganese inhibits the grain growth rate of ceria. On the basis of thermal evolution characterization 500 °C and 2 h were selected as thermal treatment parameters. Pure ceria was the only crystal phase obtained, while the decrease of lattice constant a revealed the entrance of Mn in the crystal lattice of ceria. Doped samples displayed smaller crystallite sizes and greater specific surface areas in comparison with pure sample. The catalytic efficiency of the prepared samples was tested for toluene oxidation and it was established that doping with manganese improves the catalytic efficiency of ceria.

以乙酰丙酮铈水合物和乙酰丙酮锰为前驱体，甲醇和乙二醇为双溶剂，采用溶胶-凝胶法制备纯锰掺杂二氧化铈纳米粉体。所制备的材料通过X射线衍射、傅里叶变换红外光谱、差热和热重分析、扫描电子显微镜、原子力显微镜和N _{2 进行了}表征。吸附/解吸等温线。在合成和老化过程中，实现了前体的水解和凝胶的形成。该过程在掺杂样品中更为先进。晶粒生长动力学指出锰抑制二氧化铈的晶粒生长速率。在热演化表征的基础上，选择 500 °C 和 2 小时作为热处理参数。纯二氧化铈是唯一获得的晶相，而晶格常数a的降低揭示了 Mn 在二氧化铈晶格中的入口。与纯样品相比，掺杂样品显示出更小的微晶尺寸和更大的比表面积。对制备的样品的催化效率进行了甲苯氧化测试，确定掺杂锰提高了二氧化铈的催化效率。