分子印迹聚-2-(1-咪唑-2-基)-4-苯酚纳米纤维对加氢处理燃料中含氮化合物的显著吸附去除
Remarkable adsorptive removal of nitrogen-containing compounds from hydrotreated fuel by molecularly imprinted poly-2-(1-imidazol-2-yl)-4-phenol nanofibers.
作者信息
Abdul-Quadir M S, Ferg E E, Tshentu Z R, Ogunlaja A S
机构信息
Department of Chemistry, Nelson Mandela University P.O. Box 77000 Port Elizabeth 6031 South Africa
出版信息
RSC Adv. 2018 Feb 20;8(15):8039-8050. doi: 10.1039/c8ra00543e. eCollection 2018 Feb 19.
Molecularly imprinted polymer (MIP) nanofibers were prepared by the electrospinning of poly 2-(1-imidazol-2-yl)-4-phenol (PIMH) in the presence of various nitrogen containing compounds (N-compounds). Molecularly imprinted polymer nanofibers show selectivity for various target model nitrogen-containing compounds with adsorption capacities of 11.7 ± 0.9 mg g, 11.9 ± 0.8 mg g and 11.3 ± 1.1 mg g for quinoline, pyrimidine and carbazole, respectively. Molecular modelling based upon density functional theory (DFT) indicated that hydrogen bond interactions may take place between the lone-pair nitrogen atom of model compounds (quinoline and pyrimidine) and the -OH and -NH groups of the PIMH nanofibers. The adsorption mode followed the Freundlich (multi-layered) adsorption isotherm, which indicated possible nitrogen-nitrogen compound interactions. Molecularly imprinted polymer nanofibers show potential for the removal of nitrogen-containing compounds in fuel.
通过在各种含氮化合物（N-化合物）存在下静电纺丝制备聚2-(1-咪唑-2-基)-4-苯酚（PIMH），从而得到分子印迹聚合物（MIP）纳米纤维。分子印迹聚合物纳米纤维对各种目标模型含氮化合物具有选择性，对喹啉、嘧啶和咔唑的吸附容量分别为11.7±0.9 mg/g、11.9±0.8 mg/g和11.3±1.1 mg/g。基于密度泛函理论（DFT）的分子模拟表明，模型化合物（喹啉和嘧啶）的孤对氮原子与PIMH纳米纤维的-OH和-NH基团之间可能发生氢键相互作用。吸附模式遵循弗伦德利希（多层）吸附等温线，这表明可能存在氮-氮化合物相互作用。分子印迹聚合物纳米纤维在去除燃料中的含氮化合物方面具有潜力。
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