Monodisperse mesoporous La₂O₃ flakes were prepared by hydrothermal methods using polyethylene glycol as pore-expanding agent, the catalyst exhibited better catalytic activity than normal La₂O₃ in the reaction of glycerol and dimethyl carbonate to produce glycerol carbonate. The influence of the molecular weight of polyethylene glycol and the mass ratio of La(NO₃)₃·6H₂O/polyethylene glycol on the catalyst was investigated. The results showed that the morphology of La₂O₃ was remolded to porous flakes interestingly by the suitable type and dosage of pore-expanding agent, this change made the La₂O₃ catalyst particles have higher alkalinity, better crystallinity, larger specific surface area and good dispersion, which greatly improved the catalytic performance of the catalyst. In addition, the optimal reaction conditions were studied. As a result, the as-prepared porous La₂O₃ modified by polyethylene glycol-20000 showed excellent catalytic performance with high glycerol carbonate yield of 99.4% under the optimal reaction conditions as follows: the glycerol/dimethyl carbonate molar ratio was 1:5, the catalyst dosage was 5.0 wt% to glycerol, the reaction temperature was 85 °C and the reaction time was 0.5 h. The catalyst had outstanding stability after six cycle reactions with almost no loss of catalytic activity. Thereby, the catalyst was considered to possess the promising potential in industrial production for catalyzing glycerol to the high value-added chemical glycerol carbonate.

以聚乙二醇为扩孔剂，通过水热法制备了单分散介孔La ₂ O ₃片，该催化剂在甘油与碳酸二甲酯反应生成碳酸甘油酯中表现出比普通La ₂ O ₃更好的催化活性。研究了聚乙二醇的分子量和La（NO ₃）₃ ·6H ₂ O /聚乙二醇的质量比对催化剂的影响。结果表明，La中的形态₂ ö ₃是有趣的是由合适的类型和扩孔剂的剂量重塑到多孔薄片，这种变化由La ₂O ₃催化剂颗粒具有较高的碱度，较好的结晶度，较大的比表面积和良好的分散性，大大提高了催化剂的催化性能。另外，研究了最佳反应条件。结果，制备的多孔La ₂ O ₃最佳反应条件为：甘油/碳酸二甲酯的摩尔比为1：5，催化剂用量为甘油的5.0 wt％，在最佳反应条件下，聚乙二醇-20000改性的碳酸甘油酯具有优异的催化性能，碳酸甘油酯的收率高，为99.4％。温度为85℃，反应时间为0.5小时。该催化剂在六个循环反应后具有优异的稳定性，几乎没有催化活性的损失。因此，认为该催化剂在工业生产中具有催化甘油到高附加值化学甘油碳酸酯的潜力。