Selectivity

Engineering

Fabrication

Diesel fuel

Nanomaterials

Pathology

Catalysis

Nanotechnology

Organic chemistry

Inorganic chemistry

Chemistry

Nanoreactor

Metallurgy

Materials science

Alternative medicine

Phosphomolybdic acid

Dibenzothiophene

Oxide

Chemical engineering

Molybdenum

Flue-gas desulfurization

Medicine

Fuel

Hollow nanomaterials are considered to be excellent carriers due to the nanoreactor confinement effect, which can improve the performance of the supported catalysts. In this work, a hollow silica confined defective molybdenum oxide catalyst (MoOx/HS) was obtained by using phosphomolybdic acid grafted polystyrenes as the templates. Compared with solid silica-supported catalyst (MoO3/SS), MoOx/HS could make better use of active components to achieve complete desulfurization. The calculated turnover value (TON) of MoOx/HS was 1.37 mol/mol, which is three times more than that of MoO3/SS. The presence of oxygen defects also facilitated the oxidation reaction. In addition, the catalyst MoOx/HS had good stability and selectivity, and the desulfurization rate of dibenzothiophene (DBT) remained 95.3% after being recycled for 5 times.

In situ fabrication of hollow silica confined defective molybdenum oxide for enhanced catalytic oxidative desulfurization of diesel fuels