Journal
CHEMICAL ENGINEERING JOURNAL
Volume 391, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2019.123471
Keywords
Covalent organic framework; Post-modification; Heterogeneous catalysts; Gold nanoparticles
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Funding
- National Natural Science Foundation of China [21875079, 21672078]
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Post-modification strategy was used to synthesize sulfur-containing covalent organic framework (S-COF) by thiol-ene click reaction from a propenyl-functionalized COF (A-COF). Furthermore, the obtained S-COF was used as matrix to successfully prepare COF-supported Au NPs (Au-S-COF) with narrow size distribution (4.2 +/- 1.2 nm) and high distribution density, which shows excellent catalytic activities in reduction of 4-nitrophenol with remarkable stability and recyclability. In the Au-S-COF heterogeneous catalytic system, the strong anchoring ability between Au NPs and sulfur-containing groups over COF's surface enhance the binding of Au NPs with COFs to maintain the dispersity of NPs and their catalytic activity for long-term performance.
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