| Autor: |
Hai-Ping Huang, Yu-Mei Zhang, Liang Xu |
| Rok vydání: |
2020 |
| Předmět: |
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| Zdroj: |
Chinese Journal of Analytical Chemistry. 48:e20032-e20037 |
| ISSN: |
1872-2040 |
| DOI: |
10.1016/s1872-2040(20)60005-6 |
| Popis: |
Au nanoparticle-decorated Dy2(WO4)3 nanocomposites were prepared by reduction of HAuCl4 on the surface of Dy2(WO4)3 nanobelts which were synthesized by hydrothermal method. The formation of nanocomposites was confirmed by transmission electron microscopy (TEM), energy dispersive spectroscopy (EDS) and UV-vis absorption spectroscopy. Au-Dy2(WO4)3 based electrochemical sensor was fabricated by spreading Au-Dy2(WO4)3 aqueous solution on the surface of glassy carbon electrode (GCE) and investigated by cyclic voltammetry (CV) and differential pulse voltammetry (DPV) methods. The prepared sensor exhibited excellent electrocatalytic activity, stability, reproducibility and selectivity with well-separated oxidation peaks toward the electrooxidation of uric acid (UA) and nitrite (NO2−). Electrochemical determination of these two biomolecules in their mixture solution showed linear responses in the ranges of 0.04–1.0 mmol/L with a detection limit of 15 μmol/L for UA, and 0.01–1.0 mmol/L with a detection limit of 3.5 μmol/L for NO2−. The sensor can be applied in determination of UA and NO2− in human urine samples. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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