3 years ago

f-MWCNTs-PIN/Ti2O3 nanocomposite: Preparation, characterization and nanomolar detection of α-Lipoic acid in vegetables

f-MWCNTs-PIN/Ti2O3 nanocomposite: Preparation, characterization and nanomolar detection of α-Lipoic acid in vegetables
A highly sensitive, and selective α-Lipoic acid (ALA) sensor based on a functionalized multi-walled carbon nanotubes-polyindole/Ti2O3 (f-MWCNTs-PIN/Ti2O3) nanocomposite modified glassy carbon electrode (GCE) was developed. The fabricated f-MWCNTs-PIN/Ti2O3/GCE displayed an enhanced voltammetric response for oxidation towards ALA relative to that of a f-MWCNTs/GCE, f-MWCNTs-PIN/GCE, Ti2O3/GCE, and a bare GCE. Under optimum conditions, the f-MWCNTs-PIN/Ti2O3/GCE showed a wide linear range at ALA concentrations of 0.39–115.8μM. The limit of detection of 12nM and sensitivity of about 6.39μAμM−1cm−2. The developed sensor showed anti-interference, reproducibility, good repeatability, and operational stability. Applied possibility of the sensor has been confirmed in vegetable samples.

Publisher URL: www.sciencedirect.com/science

DOI: S0925400517314727

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