A molecularly imprinted polymer based on TiO2 as a sacrificial support for selective recognition of dibenzothiophene

Xu, Wenqing; Zhou, Wei; Xu, Pingping; Pan, Jianming; Wu, Xiangyang

doi:10.1016/j.cej.2011.05.089

Cited by 78 publications

(20 citation statements)

References 25 publications

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“…Identical sites of SMIPs are distributed on the surface of supports, for this reason, mass transfer is accelerated and binding capacity is improved [16,22]. SMIPs based on various functional materials, such as SiO 2 [23], TiO 2 [24], grapheme [25], carbon nanotubes [26], and carbon microspheres (CMSs) have been reported. Among the various options, CMSs are one of the ideal support materials for their good thermal stability, excellent mechanical performance, and acid/base resistance [27].…”

Section: Introductionmentioning

confidence: 99%

Functional monomer screening and preparation of dibenzothiophene-imprinted polymers on the surface of carbon microsphere

et al. 2014

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Three candidate monomers (methacrylic acid, 2-vinyl pyridine, and 2-acrylamide-2-methyl sulfuric acid) were screened through computational simulation method to prepare effective surface molecularly imprinted polymers (SMIPs) based on carbon microspheres (CMSs) for dibenzothiophene removal from fuels. The optimized structures of complexes were described using density functional theory calculation at B3LYP/6-311??G(d,p) level and frequency calculations for each molecule and complex were conducted to provide insights into electrostatic interaction between monomers and template DBT. Besides, the reliability of computational simulation method for screening was tested by comparing the theoretical data with experimental results from gas chromatography. The computational data suggest that methacrylic acid (MAA) was the preferred monomer with the largest absolute binding energy (14.79 kJ mol -1 ), which is in accordance with the experimental results. Thesaturated adsorption of PMAA-SMIPs/CMSs was the best (41.73 mg g -1 ). Besides, PMAA-SMIPs/CMSs show highest special selectivity for dibenzothiophene against benzothiophene, and the relative selectivity coefficient k 0 was 2.02. The computational simulation method can be effectively used in monomer screening. This work may help understand the mechanisms of polymerization and recognition process between SMIPs and template and design SMIPs with improved adsorption performance.

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Section: Introductionmentioning

confidence: 99%

Functional monomer screening and preparation of dibenzothiophene-imprinted polymers on the surface of carbon microsphere

et al. 2014

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“…The MMIPs were prepared as follows Xu et al 2011): (i) DBT (2.0 mmo ) and 4-VP (8.0 mmo ) were dissolved in 10 m toluene. This mixture was stirred for 1 h to obtain the pre-assembly solution.…”

Section: Preparation Of Mmipsmentioning

confidence: 99%

Selective Adsorption of Dibenzothiophene Using Magnetic Molecularly Imprinted Polymers

Huang

et al. 2012

Adsorption Science & Technology

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ABSTRACT:In this study, a novel and quick method for selective adsorption of dibenzothiophene (DBT) from gasoline using magnetic molecularly imprinted polymers (MMIPs) as the adsorbent has been employed. The MMIPs were prepared by a surface molecular imprinting technique, using Fe 3 O 4 magnetite nanoparticles as a magnetically susceptible component, DBT as template molecule, 4-vinylpyridine (4-VP) as functional monomer and ethylene glycol dimethacrylate (EGDMA) as cross-linker. The synthetic MMIPs were characterized by Fourier transform infrared (FT-IR) spectroscopy, scanning electron microscopy (SEM) and vibrating sample magnetometer (VSM). The adsorption performances of MMIPs were investigated by batch adsorption experiments in terms of adsorption kinetics, isotherms and selective recognition. The results of the study indicated that MMIPs were able to adsorb DBT well, the adsorption equilibrium time was about 5 h and the equilibrium adsorption amount was 22.23 mg/g at 318 K. In the corresponding selectivity test, MMIPs exhibited a greater adsorption capacity towards DBT than the other three analogues.

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“…However, MIPs may aggregate due to their size. In the previous studies, TiO 2 (W. Xu et al 2011) and SiO 2 (L. Xu et al 2012) were used as supports for the preparation of surface MIPs.…”

Section: Introductionmentioning

confidence: 99%

Determination of Acephate in Vegetables by Magnetic Molecularly Imprinted Polymer Isolation Coupled with High-Performance Liquid Chromatography

2014

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Magnetic molecularly imprinted polymers based on carbon nanotubes were prepared and characterized by infrared spectrometry, transmission electron microscopy, and vibrating sample magnetometry and were employed for the isolation of acephate from cabbage, spinach, lettuce, leeks, and celery. Kinetic and recognition studies were carried out in order to investigate the adsorption properties of the polymers. During the application process, the acephate extracted from vegetables was purified with the magnetic molecularly imprinted polymers and determined by high performance liquid chromatography with an ultraviolet detector. The recoveries of acephate at three fortified concentrations (0.015, 0.15, and 1.5 mg kg À1 ) were between 89.2% and 93.4%. The limits of detection and quantification of acephate were 0.0025 and 0.0077 mg kg À1 , respectively. The linear dynamic range was from 0.01 to 5 mg kg À1 . The relative standard deviations of intra-and inter-day precision were 1.1% to 5.9% and 2.7% to 6.4%, respectively. The developed method was demonstrated to be rapid and selective for the extraction and determination of acephate in vegetables.

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A molecularly imprinted polymer based on TiO2 as a sacrificial support for selective recognition of dibenzothiophene

Cited by 78 publications

References 25 publications

Functional monomer screening and preparation of dibenzothiophene-imprinted polymers on the surface of carbon microsphere

Functional monomer screening and preparation of dibenzothiophene-imprinted polymers on the surface of carbon microsphere

Selective Adsorption of Dibenzothiophene Using Magnetic Molecularly Imprinted Polymers

Determination of Acephate in Vegetables by Magnetic Molecularly Imprinted Polymer Isolation Coupled with High-Performance Liquid Chromatography

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