State Key Laboratory of Solidification Processing, Carbon/Carbon Composites Research Center, Northwestern Polytechnical University, Xi'an 710072, China.
State Key Laboratory of Solidification Processing, Carbon/Carbon Composites Research Center, Northwestern Polytechnical University, Xi'an 710072, China.
Biosens Bioelectron. 2016 Jan 15;75:161-5. doi: 10.1016/j.bios.2015.08.024. Epub 2015 Aug 15.
In this work, the core-shell structure of NiCo2O4@Polyaniline (NiCo2O4@PANI) 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 NiCo2O4@PANI composite and NiCo2O4 nanoparticles toward glucose are studied based on glassy carbon electrode. Electrochemical studies indicate that the obtained core-shell NiCo2O4@PANI composite shows higher electrocatalytic activity toward the oxidation of glucose, compared with NiCo2O4 nanoparticles. The enhanced performance is related to the core-shell structure of NiCo2O4@PANI composite and the outstanding conductivity of the polyaniline shell. At a potential of +0.5V, the NiCo2O4@PANI 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 0.3833μM. It also shows significant electrochemical stability, good reproducibility and excellent selectivity. The results suggest that the NiCo2O4@PANI nanocomposite is a promising electrode material for electrochemical biosensor.
在这项工作中，通过简便的水热处理和聚苯胺（PANI）涂层后处理，制备了 NiCo2O4@聚苯胺（NiCo2O4@PANI）核壳结构纳米复合材料。通过透射电子显微镜（TEM）、X 射线衍射（XRD）、X 射线光电子能谱（XPS）和拉曼光谱对合成材料进行了表征。基于玻碳电极，研究了 NiCo2O4@PANI 复合材料和 NiCo2O4 纳米粒子对葡萄糖的生物传感性能。电化学研究表明，与 NiCo2O4 纳米粒子相比，所获得的核壳 NiCo2O4@PANI 复合材料对葡萄糖的氧化具有更高的电催化活性。这种增强的性能与 NiCo2O4@PANI 复合材料的核壳结构和聚苯胺壳的优异导电性有关。在+0.5V 的电位下，NiCo2O4@PANI 纳米复合材料修饰的玻碳电极在 4.7350mM 范围内表现出宽线性范围，灵敏度为 4.55mAmM(-1)cm(-2)，检测限为 0.3833μM。它还表现出显著的电化学稳定性、良好的重现性和优异的选择性。结果表明，NiCo2O4@PANI 纳米复合材料是一种很有前途的电化学生物传感器电极材料。
