Encapsulation of Sandwich POM in MIL-101 as Efficient Oxidative Desulfurization Catalyst of DBT

This study shows the successful encapsulation of sandwich cobalt-tungsten polyoxomolybdate (Na-12[WCo3(H2O)(2)(Co9O34)(2)], abbreviated as CoWPOM) guest in mesoporous metal-organic framework MIL-101 host under static condition via a facile post-synthesis strategy. Several characterizations including powder XRD, FTIR, TGA, SEM-EDS, UV-vis DRS, XRF, and low temperature N-2 adsorption-desorption isotherm demonstrate the incorporation and homogenous-distribution of the sandwich CoWPOM guests in cavities of the MIL-101 host. The CoWPOM@MIL-101 composite possesses a better synergistic effect, and it demonstrates an excellent oxidative desulfurization catalytic activity with the DBT removal of 98.1% and recyclability at least 5 times without obvious activity decrease. [GRAPHICS] .