| 저자(한글) |
Yu, Z.,Li, H.,Zhang, X.,Liu, N.,Tan, W.,Zhang, X.,Zhang, L. |
| 초록 |
In this work, the core-shell structure of NiCo 2 O 4 Pi;olyaniline (NiCo 2 O 4 Pi;ANI) nanocomposite is fabricated via a facile hydrothermal treatment followed by a post-Polyaniline (PANI) coating process. The synthesized materials are characterized by Transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and Raman spectrometer. The biosensing properties of NiCo 2 O 4 Pi;ANI composite and NiCo 2 O 4 nanoparticles toward glucose are studied based on glassy carbon electrode. Electrochemical studies indicate that the obtained core-shell NiCo 2 O 4 Pi;ANI composite shows higher electrocatalytic activity toward the oxidation of glucose, compared with NiCo 2 O 4 nanoparticles. The enhanced performance is related to the core-shell structure of NiCo 2 O 4 Pi;ANI composite and the outstanding conductivity of the polyaniline shell. At a potential of +0.5V, the NiCo 2 O 4 Pi;ANI nanocomposite modified glass carbon electrode demonstrates a wide linear range up to 4.7350mM with sensitivity of 4.55mAmM -1 cm -2 and detection limit of 0.3833 mu;M. It also shows significant electrochemical stability, good reproducibility and excellent selectivity. The results suggest that the NiCo 2 O 4 Pi;ANI nanocomposite is a promising electrode material for electrochemical biosensor. |
