Tetra-n-butylammonium decatungstate supported on Fe 3 O 4 nanoparticles: a novel nano-catalyst for green synthesis of nitroso compounds - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Catalysis Science & Technology Année : 2023

Tetra-n-butylammonium decatungstate supported on Fe 3 O 4 nanoparticles: a novel nano-catalyst for green synthesis of nitroso compounds

Résumé

The aim of this study was to prepare a Fe 3 O 4 /tetra-n-butylammonium decatungstate (TBADT) catalyst (M-DT) for the selective oxidation of aromatic amine compounds in the presence of hydrogen peroxide (H 2 O 2). The material M-DT, prepared from the interactions between TBADT and Fe 3 O 4 , was fully characterized by Fourier infrared spectroscopy (FTIR), X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS) and, X-ray photoelectron spectroscopy (XPS). Electron transfers between H 2 O 2 and TBADT or Fe 3 O 4 or M-DT were studied by cyclic voltammetry (CV) using carbon-modified electrodes. The optimized M-DT/H 2 O 2 catalytic system can effectively oxidize sulfapyridine (SPD) to nitroso-sulfapyridine (N-SPD) in the pH range of 2.5 to 4.6 with an efficient (93%) and selective conversion (86%). The oxidation rate constant (1.20  10-2 min-1) is much higher with M-DT than with TBADT (2.09  10-4 min-1) or Fe 3 O 4 (4.81 10-4 min-1) alone using 5 mM H 2 O 2 as a co-catalyst. This M-DT catalyst can be reused 6 times with high efficiency and selectivity.

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Chimie
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Dates et versions

hal-04301268 , version 1 (22-11-2023)

Identifiants

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Peng Cheng, Mohamed Sarakha, Christine Mousty, Pierre Bonnet, Gilles Mailhot. Tetra-n-butylammonium decatungstate supported on Fe 3 O 4 nanoparticles: a novel nano-catalyst for green synthesis of nitroso compounds. Catalysis Science & Technology, 2023, 13 (4), pp.1000-1008. ⟨10.1039/d2cy01862d⟩. ⟨hal-04301268⟩
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