Xu Li, Chen Jie, Zhang Juan
School of Chemistry and Environmental Engineering, Hubei Key Laboratory of Novel Reactor and Green Chemical Technology, Wuhan Institute of Technology, Wuhan 430205, PR China.
School of Chemistry and Environmental Engineering, Hubei Key Laboratory of Novel Reactor and Green Chemical Technology, Wuhan Institute of Technology, Wuhan 430205, PR China.
J Hazard Mater. 2025 Jan 5;481:136530. doi: 10.1016/j.jhazmat.2024.136530. Epub 2024 Nov 15.
Polycyclic aromatic hydrocarbons (PAHs) are a class of persistent organic pollutants with strong carcinogenicity and mutagenicity, which cause great harm to the environment and food. Herein, a composite (NH-MIL-88@PCN-224) was prepared through a guest PCN-224 in situ grown on the host NH-MIL-88 by a surfactant-assisted growth strategy, and successfully applied for solid-phase microextraction (SPME) of PAHs from milk samples. The prepared SPME coatings exhibited high extraction and adsorption capacity for PAHs due to their porous structure, ultra-large specific surface area, strong π-π stacking, hydrophobic interactions and size-matching effects. The SPME-GC-FID method based on NH-MIL-88@PCN-224 coated fibers has the significant advantages of wide linear range (1-200 ng mL), low detection limit (0.003-0.020 ng mL), high recoveries (92.15-106.64 %) and good reproducibility. This work overcomes the lattice-matching limitation by adopting a surfactant-assisted growth strategy, which offers a new direction for the preparation of ultra-high-performance SPME coatings with extremely high extraction efficiency, exceptional thermal stability, and long service life, and greatly expands the variety of MOF SPME coatings.
多环芳烃（PAHs）是一类具有强致癌性和致突变性的持久性有机污染物，对环境和食品造成极大危害。在此，通过表面活性剂辅助生长策略，使客体PCN-224在主体NH-MIL-88上原位生长，制备了一种复合材料（NH-MIL-88@PCN-224），并成功将其应用于牛奶样品中多环芳烃的固相微萃取（SPME）。所制备的SPME涂层由于其多孔结构、超大比表面积、强π-π堆积、疏水相互作用和尺寸匹配效应，对多环芳烃表现出高萃取和吸附能力。基于NH-MIL-88@PCN-224涂层纤维的SPME-GC-FID方法具有线性范围宽（1-200 ng mL）、检测限低（0.003-0.020 ng mL）、回收率高（92.15-106.64%）和重现性好等显著优点。这项工作通过采用表面活性剂辅助生长策略克服了晶格匹配限制，为制备具有极高萃取效率、卓越热稳定性和长使用寿命的超高性能SPME涂层提供了新方向，并极大地扩展了MOF SPME涂层的种类。
