Construction of polyoxometallate-based organic-inorganic hybrid nanowires for efficient oxidative desulfurization

Abstract In this work, novel POMs-based organic-inorganic hybrid nanowires were prepared facilely and proposed as catalysts for oxidative desulfurization (ODS) of fuel with hydrogen peroxide (H 2 O 2 , 30 wt%) as an oxidant. The preparation was based on the ionic self-assembly between centrosymmetric organic bivalent cations and polymolybdate anions without using any template agents or toxic organic solvents. The as-prepared nanowire was characterized by different techniques, which verified the formation of uniform morphology and ordered supramolecular structure. As for its ODS application, despite non-porous property of the catalyst, the surface catalysis could achieve excellent catalytic performance in multi-phase reactions by reaching complete conversion of dibenzothiophene in short time. Significant reaction factors upon the ODS process were investigated in detail. The repeated experiments verified its excellent stability in regular structure, chemical composition as well as catalytic performance. In the end, the mechanism of H 2 O 2 activation by this catalyst was revealed with the assistant of Raman analysis.