Iranian Journal of Catalysis (IJC) Alkyl Ammonium Tungstate Bonded to Fe3O4@SiO2 Nanoparticles; a highly efficient Catalyst for the Oxidation of Symmetrical Sulfides to Symmetrical Sulfoxides Volume 13 (2023) IJC Issue 4, December 2023 2024 01 04 Alkyl Ammonium Tungstate Bonded to Fe3O4@SiO2 Nanoparticles; a highly efficient Catalyst for the Oxidation of Symmetrical Sulfides to Symmetrical Sulfoxides 10.30495/ijc.2023.1993331.2039 EN Seyed-Mola Khatami Department of Chemical Industry, Technical and Vocational University (TVU), Tehran, Iran Mehdi Khalaj Department of Chemistry, Islamic Azad University, Buinzahra Branch, Buinzahra, Iran Majid Ghashang Department of Chemistry, Najafabad Branch, Islamic Azad University, P.O. Box: 517; Najafabad, Iran Journal Article 2024 01 04 A magnetic organic-inorganic hybrid of Fe3O4@SiO2-functionalized propylpiperazine-1,4-diium tungstate (A) nanoparticles with a spherical structure was prepared and completely characterized by XRD, SEM, TGA-DTA, and FT-IR spectral techniques. The magnetic hybrid was used in the oxidation of symmetrical sulfides to symmetrical sulfoxides under ambient conditions. The excellent yields of sulfoxides, easy operation, and recovery, magnetic properties of the catalyst, and environmentally friendly system are the key advantages of this method.   Highlights The excellent yields of sulfoxides Easy operation and recovery Magnetic properties of the catalyst Environmentally friendly system