Catalytic/photocatalytic oxidative desulfurization activities of heteropolyacid immobilized on magnetic polythiophene nanocatalyst
Herein, Keggin-type heteropolyacid (SiMo12) supported on magnetic polythiophene nanocomposite has been successfully synthesized. The obtained Fe3O4@SiO2@PT\SiMo12 magnetic nanocomposite has been characterized by XRD, FESEM and the relating XEDS energy mapping, UV–vis DRS, ICP-MS, and VSM. The catalytic and photocatalytic oxidative desulfurization (ODS) activities of the synthesized nanocatalysts were studied with T, BT, and DBT as the model sulfur compounds. Results showed that the Fe3O4@SiO2@PT\SiMo12 nanocatalyst exhibited significantly higher catalytic and photocatalytic ODS activities than pure SiMo12, PT, and Fe3O4@SiO2@PT at the same experimental conditions. In general, Fe3O4@SiO2@PT\SiMo12 showed higher photocatalytic ODS (under visible light) activity (97.2%, 99% and 99.7%) than catalytic ODS (87%, 89.6% and 96.2%) for T, BT, and DBT respectively after 45 min. Also, the Fe3O4@SiO2@PT\SiMo12 nanocatalyst possessed excellent stability after five reaction cycles.
