Issue 4, 2023

Tetra-n-butylammonium decatungstate supported on Fe3O4 nanoparticles: a novel nanocatalyst for green synthesis of nitroso compounds

Abstract

The aim of this study was to prepare a Fe3O4/tetra-n-butylammonium decatungstate (TBADT) catalyst (M-DT) for the selective oxidation of aromatic amine compounds in the presence of hydrogen peroxide (H2O2). The material M-DT, prepared from the interactions between TBADT and Fe3O4, 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). The electron transfer between H2O2 and TBADT or Fe3O4 or M-DT was studied by cyclic voltammetry (CV) using carbon-modified electrodes. The optimized M-DT/H2O2 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 Fe3O4 (4.81 × 10−4 min−1) alone using 5 mM H2O2 as a co-catalyst. This M-DT catalyst can be reused 6 times with high efficiency and selectivity.

Graphical abstract: Tetra-n-butylammonium decatungstate supported on Fe3O4 nanoparticles: a novel nanocatalyst for green synthesis of nitroso compounds

Supplementary files

Article information

Article type
Paper
Submitted
28 ต.ค. 2565
Accepted
02 ม.ค. 2566
First published
17 ม.ค. 2566

Catal. Sci. Technol., 2023,13, 1000-1008

Tetra-n-butylammonium decatungstate supported on Fe3O4 nanoparticles: a novel nanocatalyst for green synthesis of nitroso compounds

P. Cheng, M. Sarakha, C. Mousty, P. Bonnet and G. Mailhot, Catal. Sci. Technol., 2023, 13, 1000 DOI: 10.1039/D2CY01862D

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