Hollow nanocages derived from metal-organic frameworks (MOFs) feature more exposed active sites, stronger interactions, and better compatibility within the polymer matrix than solid blocks. Nevertheless, the preparation always requires the sacrifice of MOFs as a self-template. Herein, using step-by-step carving in the sequence of organic phytic acid and inorganic boric acid, MOFs can be retained in the form of nanodots with high-energy plane decorated on the hollow shells, endowing the hybrid superstructure product (ZNs-B/CP) with a relatively high surface area and enhanced catalytic properties. Owing to the ingeniously designed chemical composition and nanostructures, a load of 2 wt% ZNs-B/CP into epoxy resin improved the limiting oxygen index to 28.4% and decreased the peak of heat release rate and total heat release by 43.1% and 11.9%, respectively, assisted by the fast char formation mechanism, with slight influence on the mechanical strengths of the composites. Under the background of burgeoning investigations for MOFs, this work supplements a feasible synthetic artifice for MOF nanodots and proposes a potential application as a flame retardant for epoxy resin.

与固体块相比，源自金属有机框架 (MOF) 的中空纳米笼在聚合物基质中具有更多暴露的活性位点、更强的相互作用和更好的相容性。然而，准备工作总是需要牺牲 MOF 作为自我模板。在此，通过按有机植酸和无机硼酸的顺序逐步雕刻，MOFs可以保留为纳米点的形式，在空心壳上装饰有高能平面，赋予杂化超结构产品（ZNs-B /CP) 具有相对较高的表面积和增强的催化性能。由于巧妙设计的化学成分和纳米结构，在环氧树脂中加入 2 wt% ZNs-B/CP 可将极限氧指数提高到 28.4%，放热率峰值和总放热量分别降低 43.1% 和 11.9% , 分别在快速成炭机制的帮助下，对复合材料的机械强度有轻微影响。在MOFs研究蓬勃发展的背景下，这项工作补充了MOF纳米点的可行合成工艺，并提出了作为环氧树脂阻燃剂的潜在应用。