Preparation of molecularly imprinted polymer by surface imprinting technique and its performance for adsorption of dibenzothiophene

• Published in: Journal of separation science Vol. 34; no. 14; pp. 1746 - 1753
• Main Authors: Xu, Wan-Zhen, Zhou, Wei, Bian, Li-Hua, Huang, Wei-Hong, Wu, Xiang-Yang
• Format: Journal Article
• Language: English
• Published: Weinheim Wiley-VCH Verlag 01.07.2011; WILEY-VCH Verlag; WILEY‐VCH Verlag; Wiley; Wiley Subscription Services, Inc
• Subjects: Adsorption; Analytical chemistry; Binding; binding capacity; Chemistry; Chromatographic methods and physical methods associated with chromatography; Contact; Dibenzothiophene; Electron microscopy; Environmental Pollutants - chemistry; Environmental Pollutants - isolation & purification; Exact sciences and technology; Fourier transform infrared spectroscopy; Fourier transforms; Imprinted polymers; Kinetics; Molecular Imprinting; Monomers; Polymer matrix composites; Polymers - chemical synthesis; Polymers - chemistry; potassium; Potassium tetratitanate whisker; Recognition; Scanning electron microscopy; Solid Phase Extraction - instrumentation; Solid Phase Extraction - methods; sorption isotherms; Spectrum analysis; Substrates; Surface chemistry; Surface imprinted polymer composites; temperature; Tetrathionic Acid - chemistry; Thiophenes - chemistry; Thiophenes - isolation & purification; Scanning electron microscopy; Adsorption isotherm; Temperature effect; Tricyclic compound; Langmuir isotherm; Composite material; Operating conditions; Surface structure; Affinity adsorbent; Characterization; Crosslinked copolymer; Sulfur heterocycle; Potassium Titanates; Surface imprinted polymer composites; Adsorption; Morphology; Preparation; Potassium tetratitanate whisker; Freundlich isotherm; Pyridine(4-vinyl) copolymer; Kinetics; Molecular imprinting; Dibenzothiophene
• ISSN: 1615-9306; 1615-9314; 1615-9314
• DOI: 10.1002/jssc.201100147

The novel surface imprinted polymer composites (MIP/K₂Ti₄O₉) were prepared using dibenzothiophene (DBT) as the template, 4-vinylpyridine as the functional monomer and potassium tetratitanate whisker (K₂Ti₄O₉) as the carrier. The synthetic product was characterized by Fourier transform infrared spectroscopy and scanning electron microscopy. Parameters influencing DBT adsorption such as contact time, temperature and DBT initial concentration were investigated. The adsorption kinetics were evaluated with the pseudo-first-order and pseudo-second-order models, and the adsorption isotherms were fitted by Langmuir and Freundlich models. Selectivity experiments showed that MIP/K₂Ti₄O₉ exhibited excellent recognition capacity and binding affinity to DBT compared with the comparative substrates. MIP/K₂Ti₄O₉ could also be easily regenerated and reused ten times with only about 20% loss of adsorption capacity.