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Hierarchically imprinted mesoporous silica polymer: An efficient solid-phase extractant for bisphenol A
Author/Authors :
Cheng، نويسنده , , Wenjing and Ma، نويسنده , , Haotian and Zhang، نويسنده , , Li and Wang، نويسنده , , Yan، نويسنده ,
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ماهنامه با شماره پیاپی سال 2014
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Abstract :
Improving the site accessibility of molecularly imprinted polymer (MIP) is one of the biggest challenges for application of MIP in solid-phase extraction (SPE). Hierarchically imprinted mesoporous silica polymer was prepared with semicovalently bond imprinting methods based on MCM-41 and SBA-15 mesostructures, aiming to improve the site accessibility of MIP and increase the efficiency of molecularly imprinted-SPE. Characterization and performance tests of the obtained products revealed that molecularly imprinted SBA-15 (MIP-SBA-15) not only retained the mesoporous structure of SBA-15, but also displayed excellent selectivity of MIP to the target molecule. As the MIP-SBA-15 were adopted as the adsorbents of solid-phase extraction for detecting bisphenol A in spiked water samples, the recoveries of spiked samples more than 87%, which reveals that the molecularly imprinted SBA-15 were efficient SPE adsorbents for bisphenol A.
Keywords :
Molecular imprint , mesoporous silica , hierarchical structures , BISPHENOL A , Solid-phase extraction
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