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Integrating Ultrathin Polypyrrole Framework on Nickel‐Cobalt Layered Double Hydroxide as an Amperometric Sensor for Non‐enzymatic Glucose Determination
Author(s) -
Ni Gang,
Cheng Jun,
Dai Xin,
Guo Zehao,
Ling Xiang,
Yu Tao,
Sun Zhenjie
Publication year - 2018
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201800362
Subject(s) - polypyrrole , amperometry , cobalt hydroxide , detection limit , materials science , cobalt , nickel , hydroxide , dielectric spectroscopy , electrochemistry , linear range , polymerization , electrode , chemical engineering , conductivity , inorganic chemistry , chemistry , chromatography , polymer , composite material , metallurgy , engineering
We prepared a novel amperometric sensor based on nickel cobalt layered double hydroxide (NiCo‐LDH) coupling with ultrathin polypyrrole shell (LDH@PPy) for enzyme‐free determination of glucose. Using a simple vapor polymerization route, PPy forms an internal conductive framework surrounding the LDH lamellas, leading to improved electronic conductivity as well as mitigated electrochemical impedance. As a consequence, the LDH@PPy sensor endows excellent electrocatalytic performance for glucose determination. High sensitivity (46.04 μA mM −1 cm −2 and 292.84 μA mM −1 cm −2 ), wide linear range (5–50 μM and 0.05–8.2 mM), and a low detection limit of 0.80 μM (S/N=3) could be implemented. The optimization of operation potential, reproducibility, and anti‐interference properties of the sensor were also conducted. The LDH@PPy composite presents a promising candidate for rapid and accurate determination of glucose in practical applications.