Preparation of magnetic Fe₃O₄/P (GMA‐DVB)‐PEI/Pd highly efficient catalyst with core‐shell structure

Abstract

In this paper, a simple route for palladium (Pd) nanoparticles attached to the surface of hollow magnetic Fe3O4/P (GMA‐DVB)‐polyethyleneimine (PEI) microspheres was established. Due to the large amount of imidogen groups and tertiary amine groups presenting in the PEI, Pd2+ ions could be anchored to the support by complexation with a polyfunctional organic ligand. Thereafter, a magnetic Pd catalyst having a high loading amount and good dispersibility was obtained by reducing Pd2+ ions. Afterwards, the prepared catalyst was characterized by TEM, SEM, FTIR, XRD, TGA, VSM, and UV–vis in detail. Ultimately, their catalytic activity was evaluated using the reduction of 4‐nitrophenol (4‐NP). Research showed that the Fe3O4/P (GMA‐DVB)‐PEI/Pd catalyst possessed high catalytic performances for the reduction of 4‐NP with a conversion rate of 98.43% within 540 s. Furthermore, the catalyst could be easily recovered and reused at least for nine successive cycles.

Palladium‐immobilized polymer‐coated magnetic nanocomposites as reusable catalysts for the reduction of 4‐nitrophenol

“…amino, carboxylic acid, thiol and hydroxyl groups. 16,18,23,28 The polymer shell coated on the MNP also prevented the aggregation of Pd and essentially prevented the loss of its catalytic performance.…”

“…magnetically targeted gene 13 and drug delivery, 14 environment 15 and catalyst. 16,17 MNPs showed outstanding properties such as high surface area, low toxicity, easy synthesis and easy separation from dispersions simply by applying an external magnet. 18,19 Furthermore, a number of hydroxyl groups on their surfaces can be easily modified by organic and inorganic substances, polymers and others.…”

Highly efficient photocatalytic organic dyes degradation based on 1D magnetic Bi2Fe4O9/C@AgBr composite

“…[7][8][9][10][11] To date, several technologies for the elimination of water contaminant have been developed, such as adsorption, filtration, and precipitation. [12][13][14] As an advanced oxidation technology, semiconductor photocatalysis has attracted extensive attention in environmental remediation due to its stability, efficiency, nontoxicity, low cost, and environmental friendliness. [15][16][17][18] Hence, it is the current research challenge and primary task to explore new visible light-driven semiconductor photocatalysts to solve water pollutants.…”

Facile Synthesis of LiMn0.75Fe0.25PO4/C Nanocomposite Cathode Materials of Lithium-Ion Batteries through Microwave Sintering

“…Since Padhi's first report, [1] lithium manganese phosphate (LiMnPO 4 ) has been considered as a promising cathode material for Li-ion batteries due to its lower cost, abundant source, environmental compatibility, good thermal stability, and long cycle life, especially for the uses of electric or hybrid electric vehicles, and dispersed energy storage. [2][3][4][5][6][7][8][9][10] In comparison with lithium iron phosphate (LiFePO 4 ), lithium manganese phosphate (LiMnPO 4 ) possesses a higher redox potential (4.1 V vs. Li/Li + ) and larger theoretical energy density (701 Wh kg -1 ). Furthermore, LiMnPO 4 is well compatible with the currently used electrolytes for 4 V positive electrodes such as lithium cobalt oxide (LiCoO 2 ) and lithium manganese oxide (LiMn 2 O 4 ) cathodes.…”