Molecularly imprinted polymers on the surface of porous carbon microspheres for capturing dibenzothiophene

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• 作者：Weifeng Liu ; Lei Qin ; Weiping Shi ; Lin Chen ; Yongzhen Yang…
• 关键词：Field emission scanning electron microscopy ; FTIR ; BET ; Barrett ; Joyer ; Halendal model ; Adsorption isotherms ; Gas chromatography
• 刊名：Microchimica Acta
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：183
• 期：3
• 页码：1153-1160
• 全文大小：536 KB
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• 作者单位：Weifeng Liu (1) (3)
  Lei Qin (1) (2)
  Weiping Shi (1) (2)
  Lin Chen (1) (3)
  Yongzhen Yang (1) (3)
  Xuguang Liu (1) (2)
  Bingshe Xu (1) (3)
  
  1. Key Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education, Taiyuan University of Technology, Taiyuan, 030024, China
  3. Research Center on Advanced Materials Science and Technology, Taiyuan University of Technology, Taiyuan, Shanxi, 030024, China
  2. College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan, 030024, China
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Analytical Chemistry
  Inorganic Chemistry
  Physical Chemistry
  Characterization and Evaluation Materials
  Monitoring, Environmental Analysis and Environmental Ecotoxicology
  
• 出版者：Springer Wien
• ISSN：1436-5073

文摘

A molecularly imprinted polymer (MIP) was deposited on the surface of porous carbon microspheres (MIP/p-CMSs) to obtain a sorbent for dibenzothiophene (DBT). The MIP/p-CMSs were synthesized by grafting polymerization and surface molecular imprinting using DBT as the template molecule, methacrylic acid as the functional monomer, and ethylene glycol dimethacrylate as the cross-linker. Field emission scanning electron microscopy and FTIR were used to characterize the morphology and structure of the sorbent. Additional studies included static adsorption experiments in terms of kinetics, isotherms and selective recognition adsorption. The results indicate that MIP/p-CMSs possess good recognition selectivity and affinity for DBT. The adsorption capacity reaches 123.7 mg g−1 after 150 min. The adsorption on the heterogeneous MIP/p-CMSs was modeled with pseudo-second-order and Langmuir-Freundlich isotherms. Regeneration tests show the MIP/p-CMSs to be 10 times reusable without significant loss in adsorption capacity. The method was applied to capturing DBT from (spiked) gasoline and the results confirmed its applicability. Recoveries ranged from 93.2 % to 97.7 %.