Highly Efficient Silver Catalyst Supported by a Spherical Covalent Organic Framework for the Continuous Reduction of 4-Nitrophenol

Developing new materials and novel technologies for the highly efficient treatment of toxic organic pollutants is desirable. Chemical reduction based on heterogeneous substrate/noble metal catalysts reducing agent NaBH4 has become an effective method in recent years. Here, a spherical covalent framework (SCOF) was designed to provide basic sites Ag ions, by which small NPs were immobilized SCOF form NPs@SCOF microspheres. The prepared microspheres exhibited high catalytic ability toward 4-nitrophenol (4-NP). An optimized permeation flux 2000 L m(-2) h(-1) (LMH) more than 99% 4-NP efficiency obtained with flow-through experiments, are far better reported results (below 200 LMH). Moreover, could maintain stable performance under continuous process. Our work provides material technology that can be applied easily treat pollutants.