多溴联苯
多溴联苯醚
化学
污染物
纳米技术
共价键
环境化学
环境科学
材料科学
有机化学
作者
Suxin Zhou,Yixin Kuang,Yueru Shi,Yalan Hu,Luyi Chen,Juan Zheng,Gangfeng Ouyang
标识
DOI:10.1016/j.cej.2022.139743
摘要
Controllable construction of covalent organic frameworks (COFs) is fascinating, and full elucidations on the relationships between their microstructures and adsorption performance for persistent organic pollutants (POPs) are imperative and desirable, yet challenging. Herein, the 2,5-dimethoxybenzaldehyde (DB) has been first employed as a modulator to construct COFs with higher specific surface area and enhanced hydrophobicity under the mild conditions, after competing with the building blocks of 2,5-dimethoxyterephaldehyde (DMTP) and 1,3,5-tris(4-aminophenyl)benzene (TAPB). These TAPB-DMTP-DB COFs have been further fabricated as solid phase microextraction (SPME) coatings with uniform morphology and comparative thickness, to investigate their enrichment capacities for POPs systematically. In particular, the DB-modulated COF demonstrated outstanding enrichment factors (4400–11360) for polybrominated biphenyls (PBBs). Moreover, ultrasensitive analytical method has been developed based on the DB-modulated COF-coated fiber and gas chromatography-mass spectrometry (GC–MS), with low limits of detection (0.04–0.28 ng/L), wide linear range (0.25–5000 ng/L), and satisfactory reproducibility, realizing the precise quantifications of ultra-trace PBBs in environmental aqueous samples.
科研通智能强力驱动
Strongly Powered by AbleSci AI