Performance of polybithiophene-palladium particles modified electrode for non-enzymatic glucose detection

•The Pd-PBTh/ITO nanocomposite was synthesized and electrochemically characterized.•The Pd-PBTh/ITO exhibited excellent electrocatalytic performances in the glucose concentration range of 0.04–0.4 mM.•Amperometric sensor for glucose detection is construite with hight selectivity and stability. This...

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Bibliographic Details
Published in:Synthetic metals 2020-08, Vol.266, p.116437, Article 116437
Main Authors: Lamiri, Leila, Belgherbi, Ouafia, Dehchar, Charif, Laidoudi, Samiha, Tounsi, Assia, Nessark, Belkacem, Habelhames, Farid, Hamam, Abderrazak, Gourari, Bariza
Format: Article
Language:English
Subjects:
Acetonitrile
Aqueous solutions
Chemical sensors
Conducting polymer
Cyclic voltammetry
Glucose
Indium tin oxides
Lithium perchlorates
Microparticles
Palladium
Polybithiophene
Selectivity
Sensors
Substrates
Thin films
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Summary:•The Pd-PBTh/ITO nanocomposite was synthesized and electrochemically characterized.•The Pd-PBTh/ITO exhibited excellent electrocatalytic performances in the glucose concentration range of 0.04–0.4 mM.•Amperometric sensor for glucose detection is construite with hight selectivity and stability. This work describes preparation of an electrochemical sensor based on composites of polybithiophene (PBTh) and palladium (Pd) microparticles, designed for the detection of glucose under alkaline conditions. The preparation method involved two-separated steps: First, the PBTh film was grown on an indium tin oxide substrate by oxidative polymerization of bithiophene in acetonitrile/lithium perchlorate electrolyte solution using cyclic voltammetry method. Second, Pd particles were electrodeposited on PBTh/ITO surface from a separate aqueous solution by chronoamperometry technique. The prepared Pd-PBTh/ITO sensor gives a linear response range from 0.04 to 0.4 mM with a sensitivity of 5.62 mA/mM cm2 and a detection limit of 7 μM. In addition, the sensor showed good selectivity to the target element and high stability.
ISSN:0379-6779
1879-3290
DOI:10.1016/j.synthmet.2020.116437