Journal
NANOMATERIALS
Volume 10, Issue 3, Pages -Publisher
MDPI
DOI: 10.3390/nano10030426
Keywords
magnetic covalent organic frameworks; nanocomposite; core-shell; p-nitrophenol; reduction
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Funding
- Guangxi Key Laboratory of Clean Pulping, Papermaking and Pollution Control Opening Fund [KF 201711]
- Open Project Program of National Demonstration Center for Experimental Light Chemistry Engineering Education [2018QGSJ02-09]
- Shaanxi University of Science and Technology
- Key Scientific Research Plan of Shaanxi Provincial Education Department [17JS016]
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In this work, magnetic CuFe2O4/Ag nanoparticles activated by porous covalent organic frameworks (COF) was fabricated to evaluate the heterogenous reduction of 4-nitrophenol (4-NP). The core-shell CuFe2O4/Ag@COF was successfully prepared by polydopamine reduction of silver ions on CuFe2O4 nanoparticles, followed by COF layer condensation. By integrating the intrinsic characteristics of the magnetic CuFe2O4/Ag core and COF layer, the obtained nanocomposite exhibited features of high specific surface area (464.21 m(2) g(-1)), ordered mesoporous structure, strong environment stability, as well as fast magnetic response. Accordingly, the CuFe2O4/Ag@COF catalyst showed good affinity towards 4-NP via pi-pi stacking interactions and possessed enhanced catalytic activity compared with CuFe2O4/Ag and CuFe2O4@COF. The pseudo-first-order rate constant of CuFe2O4/Ag@COF (0.77 min(-1)) is 3 and 5 times higher than CuFe2O4/Ag and CuFe2O4@COF, respectively. The characteristics of bi-catalytic CuFe2O4/Ag and the porous COF shell of CuFe2O4/Ag@COF made a contribution to improve the activity of 4-NP reduction. The present work demonstrated a facile strategy to fabricate COF-activated nano-catalysts with enhanced performance in the fields of nitrophenolic wastewater treatment.
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