Issue 6, 2020

Construction of a thermo-responsive copolymer-stabilized Fe3O4@CD@PdNP hybrid and its application in catalytic reduction

Abstract

A novel and convenient method for fabricating homogeneous nanocatalysts with high catalytic activity and controllable reusability is promising for catalytic reduction. In this study, a high-efficiency magnetic recyclable nanocatalyst (PFe3O4@CD@PdNPs) was successfully prepared via depositing highly dispersed palladium nanoparticles (Pd NPs) on a thermo-responsive copolymer support functionalized with superparamagnetic Fe3O4 nanoparticles (NPs) with carbon dots (CDs) as both a stabilizing and reducing agent. The thermo-responsive copolymers with catechol end groups could be facilely anchored onto Fe3O4 NPs (PFe3O4) through a mussel-inspired chemistry strategy. The well-dispersed ultrafine Pd NPs were located on Fe3O4 NPs decorated with copolymer brushes using an episulfide ligand-containing copolymer as a costabilizer. Fourier transform infrared spectroscopy, thermogravimetric analysis and other tests proved that the copolymer brushes were successfully grafted on the surface of the Fe3O4 NPs. Moreover, transmission electron microscopy and X-ray photoelectron spectroscopy confirmed the presence of CDs in the nanohybrids. In addition, the PFe3O4@CD@PdNPs showed interesting thermo-responsive catalytic behaviour because of the presence of thermo-responsive polymer chains on the catalyst surface. Finally, owing to good water dispersibility and the synergistic effect of the Pd NPs with CDs, the PFe3O4@CD@PdNP nanocatalyst possessed higher catalytic activity for the catalytic reduction of different dyes and nitrophenols compared with PdNP@PFe3O4 without CD modification.

Graphical abstract: Construction of a thermo-responsive copolymer-stabilized Fe3O4@CD@PdNP hybrid and its application in catalytic reduction

Supplementary files

Article information

Article type
Paper
Submitted
09 Oct 2019
Accepted
05 Dec 2019
First published
06 Dec 2019

Polym. Chem., 2020,11, 1177-1187

Construction of a thermo-responsive copolymer-stabilized Fe3O4@CD@PdNP hybrid and its application in catalytic reduction

Y. Yang, H. Duan, S. Xia and C. Lü, Polym. Chem., 2020, 11, 1177 DOI: 10.1039/C9PY01529A

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