This work reports on a simple microfluidic strategy to controllably fabricate uniform polymeric microparticles containing hierarchical porous structures integrated with highly accessible catalytic metal organic frameworks for efficient degradation of organic contaminants. Monodisperse (W1/O)/W2 emulsion droplets generated from microfluidics are used as templates for the microparticle synthesis. The emulsion droplets contain tiny water microdroplets from homogenization and water nanodroplets from diffusion-induced swollen micelles as the dual pore-forming templates, and Fe-based metal-organic framework nanorods as the nanocatalysts. The obtained microparticles possess interconnected hierarchical porous structures decorated with highly accessible Fe-based metal-organic framework nanorods for enhanced degradation of organic contaminants via a heterogeneous Fenton-like reaction. Such a degradation performance is highlighted by using these microparticles for efficient degradation of rhodamine B in hydrogen peroxide solution. This work provides a simple and general strategy to flexibly combine hierarchical porous structures and catalytic metal-organic frameworks to engineer advanced microparticles for water decontamination.

这项工作报告了一种简单的微流体策略，用于可控地制造含有分级多孔结构的均匀聚合物微粒，该结构与高度可及的催化金属有机框架相结合，以有效降解有机污染物。由微流体产生的单分散 (W1/O)/W2 乳液液滴用作微粒合成的模板。乳液液滴含有来自均质化的微小水微滴和来自扩散诱导的溶胀胶束的水纳米滴作为双重成孔模板，以及铁基金属有机骨架纳米棒作为纳米催化剂。获得的微粒具有互连的分级多孔结构，装饰有高度可及的铁基金属有机骨架纳米棒，可通过非均相类芬顿反应增强有机污染物的降解。通过使用这些微粒有效降解过氧化氢溶液中的罗丹明 B，这种降解性能得到了突出。这项工作提供了一种简单而通用的策略，可以灵活地结合分层多孔结构和催化金属有机框架来设计用于水净化的先进微粒。