Metal–organic frameworks (CDs@NH₂-MOF(Ni)) with carbon dots as the core were synthesised successfully by a one-pot method. The synthesised CDs@NH₂-MOF(Ni) contain a large number of amine functional groups and a large surface area for capturing CO₂. The FT-IR spectra showed that there exists a large number of carboxylate and amine groups on the surface of the carbon dots, and analysis by scanning electron microscopy, transmission electron microscopy, energy-dispersive X-ray spectroscopy, X-ray diffraction, thermogravimetric, and Brunauer–Emmett–Teller surface area analysis confirmed that the CDs had successfully entered the CDs@NH₂-MOF(Ni). The cycloaddition reaction of propylene oxide (PO) and CO₂ was carried out using CDs@NH₂-MOF(Ni)/tetra-n-butylammonium bromide (TBAB) and NH₂-MOF(Ni)/TBAB as catalytic systems, respectively. The reaction results showed that the two catalytic systems have good catalytic performance for the cycloaddition reaction of PO and CO₂. Compared with that of the NH₂-MOF(Ni)/TBAB system, both the conversion of PO and the yield of propylene carbonate (PC) are improved in the CDs@NH₂-MOF(Ni)/TBAB system. Finally, the optimum catalytic reaction conditions, such as time, temperature, CO₂ pressure, and five cycles of catalytic effect, were also discussed. Meanwhile, the mechanism of the catalytic system CDs@NH₂-MOF(Ni)/TBAB in the cycloaddition reaction of PO and CO₂ was proposed in this work.

一锅法成功合成了以碳点为核心的金属有机骨架（CDs @ NH ₂ -MOF（Ni））。合成的CDs @ NH ₂ -MOF（Ni）包含大量的胺官能团和较大的表面积以捕获CO ₂。FT-IR光谱显示碳点表面存在大量的羧酸根和胺基，并通过扫描电子显微镜，透射电子显微镜，能量色散X射线光谱，X射线衍射，热重分析进行分析。 ，以及Brunauer-Emmett-Teller表面积分析证实CD已成功进入CDs @ NH ₂ -MOF（Ni）。环氧丙烷（PO）与CO ₂的环加成反应分别使用CDs @ NH ₂ -MOF（Ni）/四正丁基溴化铵（TBAB）和NH ₂ -MOF（Ni）/ TBAB进行催化。反应结果表明，两种催化体系对PO和CO ₂的环加成反应具有良好的催化性能。与NH ₂ -MOF（Ni）/ TBAB体系相比，CDs @ NH ₂ -MOF（Ni）/ TBAB体系的PO转化率和碳酸亚丙酯（PC）产率均得到改善。最后，讨论了最佳的催化反应条件，如时间，温度，CO ₂压力和五个催化作用循环。同时，催化体系CDs @ NH ₂的机理在这项工作中，提出了在PO和CO ₂的环加成反应中使用-MOF（Ni）/ TBAB 。