Journal
ANALYTICA CHIMICA ACTA
Volume 1192, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.aca.2021.339371
Keywords
Cobalt nickel oxide nanostructures; Flower-like nanoflakes; Nitinol fiber; Solid-phase microextraction; Polycyclic aromatic hydrocarbons
Categories
Funding
- National Natural Science Foundation of China [21765020]
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Flower-like hierarchical cobalt nickel oxide nanoflakes with porous structure were successfully fabricated on Nitinol fiber substrate using hydrothermal reaction and annealing treatment, exhibiting outstanding performance for selective extraction of PAHs. After parameter optimization, the method showed good linearity, low LODs, and high stability over 260 extraction-desorption cycles.
The flower-like hierarchical cobalt nickel oxide nanoflakes (CoNiO(2)NFs) with a porous structure were fabricated on Nitinol (NiTi) fiber substrate by a hydrothermal reaction and subsequent annealing treatment. The morphology affected by the molar ratios of Ni to Co and counter ions in starting precursors as well as hydrothermal reaction temperature and time was investigated in detail. The obtained CoNiO(2)NFs coating exhibited outstanding performance for the selective extraction of PAHs. After optimizing the main parameters that affected extraction through orthogonal experiments, the developed method showed good linearity in the ranges of 0.05 mu g L-1 -200 mu g L-1 with the determination coefficient >0.999. LODs were between 0.006 mu g L-1 and 0.114 mu g L-1, LOQs were in the ranges of 0.020 -0.376 mu g L-1 and RSDs were below 5.19% and 5.71% for intra-day and inter-day analyses, respectively. The developed method was successfully applied to selective enrichment and determination of target PAHs in real water samples. Moreover, the fabricated fiber exhibited high chemical and mechanical stability, and could withstand more than 260 extraction-desorption cycles without loss of its extraction efficiency. (C) 2021 Elsevier B.V. All rights reserved.
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