A series of mesoporous nano-MgO-ZrO₂ with various Mg:Zr atomic ratios were prepared via simple co-precipitation process without addition of a template. It was demonstrated by XRD, N₂ adsorption-desorption and TEM that these samples still kept well mesoporous structure even after calcination at 600 °C. During the preparation process, divalent Mg²⁺ ions could be incorporated into tetragonal ZrO₂ lattice to form a solid solution. More important, the surface basic density of these catalysts closely depended on their Mg content. Then, the resulting MgO-ZrO₂ catalysts were used as basic catalysts for the dipropyl carbonate (DPC) synthesis via transesterification of n-propanol and dimethyl carbonate. The relationship between the basic property of solid base and their catalytic performance was clarified in detail. Among all the materials, the catalyst with Mg:Zr atomic ratio = 0.5 showed the best catalytic performance. Under the suitable reaction conditions, the yield of DPC could reach 98.5% with 100% selectivity. In addition, based on the reusability test and catalyst characterization, this catalyst exhibited extraordinary structure stability and it could be reused at least four times without obvious loss of reactivity.

通过简单的共沉淀过程无需添加模板即可制备出一系列具有不同Mg：Zr原子比的介孔纳米MgO-ZrO ₂。XRD，N ₂吸附-脱附和TEM证明，即使在600°C煅烧后，这些样品仍保持良好的介孔结构。在制备过程中，可以将二价Mg ²⁺离子掺入四方ZrO ₂晶格中以形成固溶体。更重要的是，这些催化剂的表面基本密度紧密依赖于它们的Mg含量。然后，将所得的MgO-ZrO ₂催化剂用作通过n的酯交换反应合成碳酸二丙酯（DPC）的碱性催化剂-丙醇和碳酸二甲酯。详细阐明了固体碱的基本性质与其催化性能之间的关系。在所有材料中，Mg：Zr原子比= 0.5的催化剂表现出最佳的催化性能。在合适的反应条件下，DPC的收率可达98.5％，选择性为100％。另外，基于可重复使用性测试和催化剂表征，该催化剂表现出非凡的结构稳定性，并且可以重复使用至少四次而不会明显降低反应性。