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چکیده
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In this study, a new nanocomposite, P2W18Co4@ZnFe2O4@PVA, was successfully synthesized and applied as a photocatalyst for oxidative desulfurization (PODS) of fuels. P2W18Co4@ZnFe2O4@PVA integrates the high redox potential of P2W18Co4, the UV–visible-light-responsive properties of ZnFe2O4, and the stabilizing and dispersing abilities of polyvinyl alcohol (PVA). Structural and morphological characterizations of P2W18Co4@Zn- Fe2O4@PVA using FT-IR, UV–vis, XRD, SEM, EDX, and mapping confirmed the successful construction of the nanocomposite. P2W18Co4@ZnFe2O4@PVA exhibited excellent performance in removing benzothiophene (approximately 97 %) and dibenzothiophene (approximately 94 %) from model fuel under mild conditions (room temperature, air atmosphere, UV–visible light). Mechanistic investigations revealed the synergistic effect be- tween P2W18Co4 and ZnFe2O4, leading to effective charge separation and reactive oxygen species generation. P2W18Co4@ZnFe2O4@PVA demonstrated high stability and reusability over five consecutive cycles without a significant loss in activity. This study offers a green, efficient, and recyclable route for deep desulfurization of fuel, highlighting the potential of POM-based nanocomposites in sustainable energy applications
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