4.7 Article

Enzyme-free glucose sensor based on heteroatom-enriched activated carbon (HAC) decorated with hedgehog-like NiO nanostructures

Journal

SENSORS AND ACTUATORS B-CHEMICAL
Volume 250, Issue -, Pages 491-498

Publisher

ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2017.05.004

Keywords

Heteroatom-enriched activated carbon; NiO nanostructures; Hydrothermal; Enzyme-free glucose detection

Funding

  1. National Natural Science Foundation of China [21275150, 21505145]
  2. Funds for Distinguished Young Scientists of Gansu [1210RJDA013]

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An effective two-step synthesis route was developed to obtain a heteroatom-enriched activated carbon nickel oxide (HAC-NiO) nanocomposite by an eco-friendly chemical activation and hydrothermal method. The nanomaterials were characterized by scanning electron microscopy, X-ray diffraction, N-2 adsorption desorption isotherms. Furthermore, the NiO-HAC nanocomposite was used to modify glass carbon electrode (NiO-HAC/GCE) and build a novel glucose sensor. The electrochemical properties revealed that it exhibited a wide linear range (10 mu M-3.3 mM) and a low detection limit (1 mu M) toward glucose oxidation. The excellent electrocatalytic performance can be attributed to the unique surface architectures of NiO with good electron transfer rate and HAC with large active surface area during the electrochemical sensing process. High reproducibility, good anti-interference, desirable stability and enough precision made it a potential material for the development of enzyme-free sensor in real sample analysis. (C) 2017 Elsevier B.V. All rights reserved.

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