title: Facile synthesis of NiCo2O4@Polyaniline core-shell nanocomposite for sensitive determination of glucose.
abstract: 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.
authors: State Key Laboratory of Solidification Processing, Carbon/Carbon Composites Research Center, Northwestern Polytechnical University, Xi'an 710072, China.
authors: Zhiyuan
authors: Z
authors: Yu
authors: State Key Laboratory of Solidification Processing, Carbon/Carbon Composites Research Center, Northwestern Polytechnical University, Xi'an 710072, China. Electronic address: lihejun@nwpu.edu.cn.
authors: Hejun
authors: H
authors: Li
authors: State Key Laboratory of Solidification Processing, Carbon/Carbon Composites Research Center, Northwestern Polytechnical University, Xi'an 710072, China.
authors: Xinmeng
authors: X
authors: Zhang
authors: State Key Laboratory of Solidification Processing, Carbon/Carbon Composites Research Center, Northwestern Polytechnical University, Xi'an 710072, China.
authors: Ningkun
authors: N
authors: Liu
authors: State Key Laboratory of Solidification Processing, Carbon/Carbon Composites Research Center, Northwestern Polytechnical University, Xi'an 710072, China.
authors: Wenlong
authors: W
authors: Tan
authors: State Key Laboratory of Solidification Processing, Carbon/Carbon Composites Research Center, Northwestern Polytechnical University, Xi'an 710072, China.
authors: Xu
authors: X
authors: Zhang
authors: State Key Laboratory of Solidification Processing, Carbon/Carbon Composites Research Center, Northwestern Polytechnical University, Xi'an 710072, China.
authors: Leilei
authors: L
authors: Zhang
mesh_terms: D000814:Aniline Compounds; D015374:Biosensing Techniques; D003035:Cobalt / Q000737:chemistry; D005947:Glucose / Q000302:isolation & purification*; D006046:Gold / Q000737:chemistry; D046529:Microscopy, Electron, Transmission; D053761:Nanocomposites / Q000737:chemistry*; D053758:Nanoparticles / Q000737:chemistry*; D009532:Nickel / Q000737:chemistry; D010087:Oxides / Q000737:chemistry; D056951:Photoelectron Spectroscopy; D013059:Spectrum Analysis, Raman; D014961:X-Ray Diffraction
chemical_list: D000814:Aniline Compounds; D010087:Oxides; C416807:polyaniline; D003035:Cobalt; D006046:Gold; D009532:Nickel; D005947:Glucose
keywords: Core–shell; Glucose sensor; NiCo(2)O(4); Polyaniline