Mesoporous titania–silica–polyoxometalate nanocomposite materials for catalytic oxidation desulfurization of fuel oil

• DOI: 10.1039/c3cy20732c
• Publication Date: 2013-04-03T11:30:52Z
• Authors: Xue-Min Yan; Ping Mei; Lin Xiong; Lin Gao; Qifeng Yang; Lunjun Gong
• Keywords: Polyoxometalate; Dibenzothiophene

A series of mesoporous titania–silica–polyoxometalate (HPW–TiO2–SiO2) nanocomposite materials with different silica–titania ratios were prepared in the presence non-ionic surfactant by evaporation induced self-assembly method. XRD, TEM, nitrogen adsorption–desorption isotherm and FTIR measurements indicated these possess structure relatively uniform channel-like pores large internal BET surface areas. The incorporated polyoxometalate clusters preserve intact their Keggin into frameworks. nanocomposites used as catalysts for oxidative desulfurization model fuel, which was composed dibenzothiophene (DBT) hydrocarbon, while H2O2 is oxidant. catalytic oxidation results show that are very active refractory bulky molecule organosulfur compounds fuel oil. HPW–TiO2–SiO2 also shows high selectivity DBT benzene achieved goal desulfurization. acid strength acidic sites characterized NH3–TPD Py-FT-IR. It revealed Lewis play an important role removal organic sulfur from DBT–petroleum ether–benzene system. After regeneration three times, activity has not obviously decreased.