Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6612308 | Electrochimica Acta | 2015 | 9 Pages |
Abstract
A novel highly sensitive non-enzymatic glucose sensor was constructed based on gold nanoparticles decorated ternary Ni-Al layered double hydroxide/single-walled carbon nanotubes/graphene nanocomposite (Au/LDH-CNTs-G). The materials were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, UV-vis diffuse reflectance spectra and Raman spectra, and the sensing performance was investigated by electrochemical impedance spectroscopy, cyclic voltammetry and amperometric response. The results revealed that Au/LDH-CNTs-G nanocomposite modified glassy carbon electrode exhibited remarkable electrocatalytic performance toward glucose oxidation, with a wide linear range from 10 μM to 6.1 mM, a high sensitivity of â¼1989 μA·mMâ1·cmâ2 and a low detection limit of 1.0 μM based on a signal to noise ratio of 3, which was mainly attributed to the combined effects of enhanced electrical conductivity originating from three-dimensional intertwined CNTs-graphene network, good accessibility to active reaction sites from NiAl-LDH and more electron transfer passages provided by Au nanoparticles highly dispersed on the surface. What's more, as-constructed non-enzymatic sensor showed good reproducibility, repeatability, stability and anti-interference property, and was also used to practically analyze glucose concentration in human serum samples.
Keywords
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Shuai Fu, Guoli Fan, Lan Yang, Feng Li,