Encapsulated peroxophosphotungstates catalyst into magnetic MOF: Magnetically recoverable heterogeneous high efficiency desulfurization catalyst

High activity peroxophosphotungstates with different organic cations were encapsulated into the metal-organic framework modified by magnetic nanoparticle (Fe 2 O 3 /MIL-101) to prepare the magnetic supported catalysts, which were used to improve the diesel desulfurization efficiency. The desulfurization result shows that one selected catalyst, (BTA) 3 PW 4 @Fe 2 O 3 /MIL-101, possesses high catalytic activity in the oxidation of various organic sulfides with H 2 O 2 as green oxidant. The catalyst can be magnetically recycled and reused for ten consecutive cycles without significant decrease in activity. Based on the GC-MS and EPR results, it is confirmed that sulfides are oxidized to corresponding sulfones in the presence of •OH radical. In a word, the high activity, good stability and reusability of catalyst prepared in this work make it have a good prospect of industrial application.