Preparation of Magnetically Recoverable MPCTP-Ag Composite Nanoparticles and Their Application as High-Performance Catalysts

Abstract

In the present research, magnetically recyclable polyphosphazene (PCTP)/Ag (MPCTP-Ag) nanoparticles are prepared by a green path, in which PCTP was used to modify Fe3O4 nanoparticles and provide nucleation sites for the reduction of Ag nanoparticles. The prepared MPCTP-Ag nanoparticles were characterized by TEM, SEM, EDS, BET, XRD, vibrating sample magnometry, XPS, and TGA analysis. The catalytic performances of the MPCTP-Ag nanoparticles for the degradation of 4-nitrophenol (4-NP), methylene blue (MB), methyl orange (MO), and their mixtures in the presence of NaBH4 were studied. The main factors affecting the catalytic performance, including temperature, reactant concentration, and catalyst dosage, were investigated. The results showed that the MPCTP-Ag nanoparticles exhibited excellent catalytic activity for the degradation of all three targeted organic contaminants (4-NP, MB, and MO). Moreover, the product retains its catalytic activity after being reused five times by magnetic separation. The results showed that MPCTP-Ag composite nanoparticles were efficient recyclable magnetic nanocatalysts with promising application in environment protection.

Tannic Acid-Decorated Bimetallic Copper–Gold Nanoparticles with High Catalytic Activity for the Degradation of 4-Nitrophenol and Rhodamine B

“…The Cu 2p spectrum (Figure d) was fitted with two peaks at 932.6 (Cu 2p 3/2 ) and 952.6 eV (Cu 2p 1/2 ), indicating the presence of both Cu 0 and Cu + . The Au 4f spectrum exhibited two notable peaks at 84.4 (Au 4f 7/2 ) and 88.0 eV (Au 4f 5/2 ) with a splitting energy of 3.6 eV (Figure e), corresponding to the zero oxidation state of Au . These findings further confirm the successful preparation of the TA-capped CuAu nanoparticles.…”

Polymethylacrylic acid-induced fabrication of hollow hZrO2/g-C3N4 composite photocatalysts: study on solar photocatalytic performance and mechanism insight

“…PMAA nanospheres were fabricated through the reflux-precipitation polymerization of MAA using AIBN as the initiator and MBA as the crosslinking agent. 33 Specifically, 1 mL MAA, 0.02 g AIBN, 0.2 g MBA, and 100 mL acetonitrile were added into a 250 mL one-neck flask to start polymerization under magnetic stirring. The flask was submerged in an oil bath and attached with a spherical condenser.…”

Surface Deposition of Magnesium Ferrite-Based Supports with Bimetallic Gold/Silver Nanoparticles for the Catalytic Reduction of Nitroaromatics

“…9 metal nanoparticles tend to undergo agglomeration during the catalytic process, leading to decreases in the catalytic activity and stability. 10,11 In addition, these catalysts require a long period of time to separate from the solution after the completion of the reaction by centrifugation due to their nanosized particles. 11 To overcome these limitations, the magnetic nanoparticles have been employed as support materials for immobilizing the noble metal nanoparticles.…”

“…10,11 In addition, these catalysts require a long period of time to separate from the solution after the completion of the reaction by centrifugation due to their nanosized particles. 11 To overcome these limitations, the magnetic nanoparticles have been employed as support materials for immobilizing the noble metal nanoparticles. 12 Furthermore, these support materials also facilitate exposing more active sites of the metal nanoparticles for the catalytic reduction.…”

“…Noble metal nanoparticles, particularly gold (Au) and silver (Ag), have been well-known as effective catalysts for the reduction of nitroaromatics due to highly catalytic activity, biocompatibility, and antibacterial properties. − Interestingly, the formed bimetallic structure of Ag and Au exhibits enhanced catalytic activity for the reduction of model nitroaromatic 4-nitrophenol (4-NP) compared to that of the corresponding monometallic Ag and Au . However, these metal nanoparticles tend to undergo agglomeration during the catalytic process, leading to decreases in the catalytic activity and stability. , In addition, these catalysts require a long period of time to separate from the solution after the completion of the reaction by centrifugation due to their nanosized particles . To overcome these limitations, the magnetic nanoparticles have been employed as support materials for immobilizing the noble metal nanoparticles .…”