期刊
TALANTA
卷 232, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.talanta.2021.122428
关键词
Catalumineacence; Cobalt nanoparticles; Nitrogenous porous carbon; Covalent organic framework; n-Hexane; Edible oil
资金
- Research and Development Plan for Key Areas of Food Safety in Guangdong Province of China [2019B020211001]
- National Key Research and Development Program of China [2019YFC1606101]
- National Natural Science Foundation of China [21775167, 21976213]
In this study, a catalytic material of Co/NPC was fabricated from COFs and cobalt ion via direct carbonization, which showed excellent selective catalytic performance towards n-hexane. The Co/NPC based CTL sensor was employed for rapid and sensitive determination of n-hexane, with a good linear relation between signal intensity and n-hexane concentration in the range of 0.4-250.0 mg/L. Additionally, the Co/NPC based CTL sensor demonstrated accurate detection of n-hexane in edible oil samples, with recoveries ranging from 92.0% to 104.0%.
In this work, a catalytic material of cobalt doped nitrogenous porous carbon (Co/NPC) was fabricated from covalent organic frameworks (COFs) and cobalt ion via directly carbonization. Attribute to the excellent selective catalytic performance towards n-hexane, Co/NPC was employed in cataluminescence (CTL) for rapid and sensitive determination of n-hexane. Moreover, the detection conditions of CTL were evaluated, including temperature, flow rate and detecting wavelength. Under optimized conditions, a good linear relation between signal intensity of CTL and n-hexane concentration was obtained in the linear range of 0.4-250.0 mg/L and the limit of detection (LOD, S/N = 3) was 0.13 mg/L. Furthermore, the Co/NPC based CTL sensor was successfully applied to the determination of n-hexane in edible oil samples with the recoveries in the range of 92.0%-104.0%. The method comparison results of GC/MS and CTL on real sample analysis further proved the accuracy of the developed Co/NPC based CTL method. Additionally, the possible catalytic mechanism of n-hexane on the surface of Co/NPC was investigated, assisting by GC/MS on intermediation products identification. Overall, the Co/NPC based CTL sensor has been confirmed excellent performance in the n-hexane determination, which revealing extensive application in rapid residual n-hexane analysis in edible oil.
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