Hydrothermal and plasma nitrided electrospun carbon nanofibers for amperometric sensing of hydrogen peroxide
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Nitrogen-doped carbon nanofibers (CNFs) were prepared by an electrospinning method, this followed by a hydrothermal reaction or nitrogen plasma treatment to obtain electrode for non-enzymatic amperometric sensing of H2O2. The hydrothermally treated electrode performs better. Its electrochemical surface is 3.7 × 10−3 mA cm−2, which is larger than that of a nitrogen plasma treated electrode (8.9 × 10−4) or a non-doped CNF (2.45 × 10−4 mA cm−2). The hydrothermally treated CNF with rough surface and a complex profile with doped N has a higher sensitivity (357 μA∙mM−1∙cm−2), a lower detection limit (0.62 μM), and a wider linear range (0.01–0.71 mM) than N-CNFP at a working potential of −0.4 V (vs. Ag/AgCl). The electrode gave high recoveries when applied to the analysis of milk samples spiked with H2O2.
KeywordsSpecific activity Cyclic voltammetry Hydrogen peroxide reduction reaction Electrochemical surface area X-ray photoelectron spectrum
The authors thank the Ministry of Science and Technology, Taiwan, for financially supporting this research under Contract Nos. MOST 106-2221-E-151-039-MY3 and MOST 105-2628-E-006-009-MY3 as well as Mr. Shyne-Yen Yao at National Cheng Kung University and Mr. Hsien-Tsan Lin of Regional Instruments Center at National Sun Yat-Sen University for their assistance for TEM experiments.
Compliance with ethical standards
The author(s) declare that they have no competing interests.
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