Phosphotungstic acid containing ionic liquid immobilized on magnetic mesoporous silica rod catalyst for the oxidation of dibenzothiophene with H2O2

• Phosphotungstic acid containing magnetic mesoporous silica rod is synthesized.
• The catalyst has high specific surface area and mesoporous structures.
• The catalysts exhibit high activity for the oxidation of dibenzothiophene.
• The conversion could reach 99%; the reaction time was short.
• The catalyst can be easily separated from the reaction system.

We have synthesized phosphotungstic acid (PA) containing ionic liquid 1-methyl-3-[(triethoxysilyl) propyl] imidazolium chloride (IL) immobilized on magnetic mesoporous silica rod to catalyze dibenzothiophene (DBT) for producing dibenzothiophene monoxide (DBTO) and dibenzothiophene dioxide (DBTO2). The effects of reaction time and reaction temperature on the conversion of DBT were studied. It was demonstrated that the catalyst was extremely effective for the reaction and the catalyst could be easily separated from the reaction solution by applying an external magnetic field and recycled several times.

Synthesis of phosphotungstic acid containing ionic liquid immobilized on magnetic mesoporous silica rod (MMSR-IL-PA).Figure optionsDownload as PowerPoint slide