| Autor: |
Li, Bo-Qiang, Nie, Fei, Sheng, Qing-Lin, Zheng, Jian-Bin |
| Zdroj: |
Chemical Papers; Jul2015, Vol. 69 Issue 7, p911-920, 10p |
| Abstrakt: |
A functional Ag-Fe3O4-grapheme oxide magnetic nanocomposite was synthesized and used to prepare a nitrite sensor. Morphology and composition of the nanocomposites were characterized by a transmission electron microscope, UV-VIS spectroscopy, X-ray diffraction, and Fourier transform infrared spectra. Electrochemical investigation indicated that the nanocomposites possess excellent electrochemical oxidation ability towards nitrites. The sensor exhibited two linear ranges: one from 0.5 μM to 0.72 mM with a correlation coefficient of 0.996 and sensitivity of 1996 μA mM−1 cm−2; the other from 0.72 mM to 8.15 mM with a correlation coefficient of 0.998 and sensitivity of 426 μA mM−1 cm−2. The limit of detection of this sensing system was 0.17 μM at the signalto- noise ratio of 3. Additionally, the sensor exhibited long-term stability, good reproducibility, and anti-interference. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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