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Reference type: Journal
Authors: Xu WZ, Zhou W, Xu PP, Pan JM, Wu XY, Yan YS
Article Title: A molecularly imprinted polymer based on TiO2 as a sacrificial support for selective recognition of dibenzothiophene.
Publication date: 2011
Journal: Chemical Engineering Journal
Volume: 172
Issue: (1)
Page numbers: 191-198.
DOI: 10.1016/j.cej.2011.05.089
Alternative URL: http://www.sciencedirect.com/science/article/pii/S138589471100670X

Abstract: Surface imprinting technique combined with a sacrificial support process was established to synthesize DBT-imprinted polymer in which TiO2 acts as the sacrificial support material (H-MIP). The synthetic samples were characterized by the techniques of Fourier transmission infrared spectrometry, transmission electron microscopy, X-ray diffractometer and nitrogen sorption. Then batch experiments were performed to evaluate the adsorption kinetics, adsorption isotherms, and selective recognition of H-MIP. The adsorption behavior followed the pseudo-second-order kinetic model, indicating that the adsorption process was chemically carried out. Two adsorption isotherm models were applied to analyze the equilibrium data, obtaining the best description by Freundlich isotherm model. Thermodynamic parameters revealed the spontaneity and endothermic nature of adsorption. The absorption abilities of DBT from n-octane solutions followed the order H-MIP > T-MIP > H-NIP > TiO2. H-MIP also could selectively recognize DBT over similar compounds. Finally, the method was applied to the desulfurization and determination of trace DBT in gasoline sample, and the adsorbent could be regenerated
Template and target information: dibenzothiophene, DBT
Author keywords: molecularly imprinted polymer, titanium dioxide, dibenzothiophene, adsorption


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