期刊
CHEMICAL ENGINEERING JOURNAL
卷 172, 期 1, 页码 191-198出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2011.05.089
关键词
Molecularly imprinted polymer; Titanium dioxide; Dibenzothiophene; Adsorption
资金
- National Science Foundation of China [20676057, 20876071, 20877036]
- China Postdoctoral Science Foundation [20090461066]
- Jiangsu Planned Projects for Postdoctoral Research Funds of China [0902056C]
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 noctane 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. (C) 2011 Elsevier B.V. All rights reserved.
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