Development of ZIF-67 derived hollow multishelled structures Co3O4/carbon nanomaterials as spiral solid-phase microextraction fiber for superior capture of fifteen PAHs
Development of ZIF-67 derived hollow multishelled structures Co3O4/carbon nanomaterials as spiral solid-phase microextraction fiber for superior capture of fifteen PAHs
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开发 ZIF-67 衍生的中空多壳结构 Co3O4/碳纳米材料作为螺旋固相微萃取纤维，可出色地捕获 15 种 PAH
DOI：
10.1016/j.seppur.2021.119367
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发表时间：
2021-12
影响因子：
8.6
通讯作者：
Lu Xiaoquan
中科院分区：
文献类型：
--
作者：
Wang Fangbing;Wang Xuemei;Cui Xinglan;Ji Hong;Liu Yacong;Du Xinzhen;Lu Xiaoquan
为了实现对痕量多环芳烃(PAHs)的高效捕集，设计了一种新型的螺旋固相微萃取纤维，该纤维采用ZIF-67衍生的中空多壳结构Co3O4/碳纳米材料(HOMS-Co3O4/C)作为涂层。用2，5-二羟基对苯二甲酸两次取代ZIF-67的配体2-甲基咪唑，然后裂解得到具有独特的中空双壳结构的材料。这种中空结构的形成可以用Ostwald熟化来解释。用15种多环芳烃、4种溴化阻燃剂(BFR)和7种内分泌化学品(EDCs)研究了HOMS-Co3O4/C包覆S固相微萃取纤维的萃取性能。与BFR和EDCS相比，螺旋纤维对多环芳烃具有更高的选择性。方法检出限低(0.002~2.680μg L−1)，线性范围宽(0.005~1000gμg L−1)，重现性好(0.7%~10.7%，纤维对纤维)。此外，与商品固相微萃取纤维相比，S固相微萃取纤维对多环芳烃表现出了良好的富集力和萃取效率，这可能是因为π-π具有较强的堆积力，被分析物与HOMS-Co3O4/C涂层之间存在疏水相互作用，HOMS涂层和螺旋纤维可以大大增加吸附剂与目标化合物的接触面积。最后，进一步采用HOMS-Co3O4/C包覆的S固相微萃取纤维成功地检测了环境水样中的15种多环芳烃。
Here, a unique spiral-solid phase microextraction (S-SPME) fiber using ZIF-67 derived hollow multishelled structures Co3O4/carbon nanomaterials (HoMS-Co3O4/C) as the coating was designed for superior capture of trace polycyclic aromatic hydrocarbons (PAHs). The ligand 2-methylimidazole of ZIF-67 was replaced twice with 2,5-dihydroxyterephthalic acid and followed by pyrolysis to obtain the material with an unique hollow double-shelled structure. The formation of the hollow structure can be explained by the Ostwald ripening. Fifteen PAHs, four brominated flame retardants (BFRs), and seven endocrine chemicals (EDCs) were used to investigate the extraction performance of HoMS-Co3O4/C coated S-SPME fiber. The spiral fiber displayed higher selectivity for PAHs compared with BFRs and EDCs. The methods had low detection limits (0.002–2.680 μg L−1), wide linear ranges (0.005–1000 μg L−1), and good reproducibility (0.7–10.7%, fiber to fiber). In addition, the S-SPME fiber demonstrated excellent enrichment ability and extraction efficiency for PAHs compared with commercial SPME fibers, it might since there were strong π-π stacking force, hydrophobic interaction between analytes and HoMS-Co3O4/C coating, also the HoMS coating and the spiral fiber could greatly increase the contact area between adsorbent and target compounds. Finally, the HoMS-Co3O4/C coated S-SPME fiber had been further adopted to detect fifteen PAHs in environmental water samples successfully.
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