Issue 9, 2017

Selective and simultaneous removal of dibenzothiophene and 4-methyldibenzothiophene using double-template molecularly imprinted polymers on the surface of magnetic mesoporous silica

Abstract

A novel double-template molecularly imprinted polymer on the surface of magnetic mesoporous silica (Fe3O4@mSiO2@DT-MIP) was prepared for the selective and simultaneous removal of dibenzothiophene (DBT) and 4-methyldibenzothiophene (4-MDBT) from gasoline fuel. The Fe3O4@mSiO2@DT-MIP was characterized by transmission electron microscopy, N2 adsorption–desorption isotherms, Fourier transform infrared spectroscopy and vibrating sample magnetometry. The adsorption behaviors of the Fe3O4@mSiO2@DT-MIP including adsorption kinetics, isotherms and selectivity were investigated in detail by gas chromatography. The adsorption equilibrium was achieved within 60 min and the maximal adsorption amount towards DBT and 4-MDBT reached 104.2 and 113.6 mg g−1, respectively. The adsorption of DBT and 4-MDBT on the Fe3O4@mSiO2@DT-MIP followed the pseudo-second-order kinetic model and Langmuir isotherm. The Fe3O4@mSiO2@DT-MIP could selectively recognize DBT and 4-MDBT in the presence of similar compounds. The Fe3O4@mSiO2@DT-MIP could be used eight times without significant loss in the adsorption capacity. Finally, the Fe3O4@mSiO2@DT-MIP was successfully applied to the desulfurization of trace DBT and 4-MDBT in real gasoline samples. It was concluded that the Fe3O4@mSiO2@DT-MIP provides a new material for deep desulfurization of fuel oils.

Graphical abstract: Selective and simultaneous removal of dibenzothiophene and 4-methyldibenzothiophene using double-template molecularly imprinted polymers on the surface of magnetic mesoporous silica

Article information

Article type
Paper
Submitted
28 Dec 2016
Accepted
30 Jan 2017
First published
30 Jan 2017

J. Mater. Chem. A, 2017,5, 4651-4659

Selective and simultaneous removal of dibenzothiophene and 4-methyldibenzothiophene using double-template molecularly imprinted polymers on the surface of magnetic mesoporous silica

J. Wang and J. Wei, J. Mater. Chem. A, 2017, 5, 4651 DOI: 10.1039/C6TA11167J

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