CeO₂ as catalysts for imine synthesis was synthesized from three different inorganic precursors (Ce(OH)₄, Ce(COOCH₃)₃∙5H₂O and Ce(NO₃)₃∙6H₂O) in ethylene glycol (EG) as solvothermal solvent. The influences of some parameters were investigated, such as the surfactant polyvinylpyrrolidone (PVP), H₂O as co-solvent, and CH₃COOH or NaOH as mineralizer (exclusive for Ce(NO₃)₃ as the precursor). The different precursors influenced the coordination of EG with cerium, crystalline, surface structure and also the catalytic ability for imine synthesis. The highest imine conversion rate was obtained when CeO₂ was synthesized from Ce(NO₃)₃ + PVP + CH₃COOH +EG. The mechanism was investigated by carefully checking the structures of the synthesized CeO₂, such as XRD, morphology, surface area, XPS and so on, and figured out that the high catalytic activity of the best CeO₂ sample was much more related with the high proportion of surface oxygen vacancies than the surface area and the Ce³⁺ ratio.

在乙二醇（EG）中，由三种不同的无机前体（Ce（OH）₄，Ce（COOCH ₃）₃ ∙5H ₂ O和Ce（NO ₃）₃ ∙6H ₂ O）合成了亚胺合成用的CeO ₂催化剂。溶剂热溶剂。研究了一些参数的影响，例如表面活性剂聚乙烯吡咯烷酮（PVP），H ₂ O作为共溶剂，CH ₃ COOH或NaOH作为矿化剂（Ce（NO ₃）₃除外）作为前体）。不同的前体影响了EG与铈，晶体，表面结构以及亚胺合成的催化能力之间的配位。当由Ce（NO ₃）₃  + PVP + CH ₃ COOH + EG合成CeO ₂时，可获得最高的亚胺转化率。通过仔细检查合成的CeO ₂的结构，如XRD，形貌，表面积，XPS等，研究了该机理，发现最佳CeO ₂样品的高催化活性与高CeO ₂样品的高催化活性密切相关。表面氧空位的比例比表面积和Ce ^3+的比例大。