Hierarchical porous metal-organic frameworks/polymer microparticles for enhanced catalytic degradation of organic contaminants
Ping Zhang1, Yi-Han Li1, Li Chen2, Mao-Jie Zhang1(), Yang Ren1, Yan-Xu Chen1, Zhi Hu1, Qi Wang1, Wei Wang2(), Liang-Yin Chu2
1. College of Engineering, Sichuan Normal University, Chengdu 610101, China 2. School of Chemical Engineering, Sichuan University, Chengdu 610065, China
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.
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