期刊
ANALYTICA CHIMICA ACTA
卷 1026, 期 -, 页码 125-132出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.aca.2018.04.010
关键词
Fe2O3; Electrospuning; Nanofiber; Electrocatalysis; Dopamine
资金
- National Natural Science Foundation of China [U1232104, 21773133]
- College student innovation and entrepreneurship training program
- Taishan Scholars Advantageous and Distinctive Discipline Program
Nanofibers of alpha-Fe2O3 and gamma-Fe2O3 have been obtained after the controlled calcination of precursor nanofibers synthesized by electrospinning. alpha-Fe2O3 nanofibers showed an irregular toruloid structure due to the decomposition of poly (4-vinyl) pyridine in air while gamma-Fe2O3 nanoparticles decorated nanofibers were observed after the calcination under N-2 atmosphere. Electrochemical measurements showed that different electrochemical behaviors were observed on the glassy carbon electrodes modified by alpha-Fe2O3 and gamma-Fe2O3 nanofibers. The electrode modified by gamma-Fe2O3 nanofibers exhibited high electrocatalytic activities toward oxidation of dopamine, uric acid and ascorbic acid while alpha-Fe2O3 nanofibers cannot. Furthermore, the gamma-Fe2O3 modified electrode can realize the selective detection of biomolecules in ternary electrolyte solutions. The synthesis of nanofibers of alpha-Fe2O3 and gamma-Fe2O3 and their electrochemical sensing properties relationship have been discussed and analyzed based on the experimental results. (C) 2018 Elsevier B.V. All rights reserved.
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