期刊
ACS APPLIED MATERIALS & INTERFACES
卷 13, 期 2, 页码 3209-3220出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.0c20444
关键词
covalent organic framework; catalytic reduction; organic pollutants; flow-through; silver nanoparticles
资金
- National Natural Science Foundation of China [51903247]
- Key Science and Technology Program of Yantai City [2018ZHGY075, 2019XDHZ093]
- Shandong Key Laboratory of Coastal Environmental Processes, YICCAS [2019SDHADKFJJ15]
Developing new materials and novel technologies for the highly efficient treatment of toxic organic pollutants is highly desirable. A method based on a spherical covalent organic framework (SCOF) for catalytic reduction has been designed, showing high catalytic reduction ability towards 4-nitrophenol (4-NP) and far superior performance compared to previous reported results.
Developing new materials and novel technologies for the highly efficient treatment of toxic organic pollutants is highly desirable. Chemical reduction based on heterogeneous substrate/noble metal catalysts and the reducing agent NaBH4 has become an effective method in recent years. Here, a spherical covalent organic framework (SCOF) was designed to provide basic sites for Ag ions, by which small Ag NPs were immobilized on the SCOF to form Ag NPs@SCOF microspheres. The prepared microspheres exhibited a high catalytic reduction ability toward 4-nitrophenol (4-NP). An optimized permeation flux of 2000 L m(-2) h(-1) (LMH) and a more than 99% 4-NP reduction efficiency were obtained with flow-through experiments, which are far better than the reported results (below 200 LMH). Moreover, the microspheres could maintain stable catalytic performance under a continuous flow-through process. Our work provides an efficient material and technology that can be applied to easily treat toxic organic pollutants.
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