Micelles self-degraded polypyrrole nanotube-cobalt oxide nanocomposite based electrochemical sensor for detection of Ascorbic acid

• Published in: Inorganic chemistry communications Vol. 145; p. 109975
• Main Authors: Ganesha, H., Veeresh, S., Nagaraju, Y.S., Suresh, D.S., Devendrappa, H.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01-11-2022
• Subjects: Binding energy; Electrochemical sensor; Methyl Orange 4-(4-dimethyl amino)phenylazo benzenesulfonic acid sodium salt; Polypyrrole Nanotubes: Ascorbic acid; Polypyrrole Nanotubes: Ascorbic acid; Electrochemical sensor; Binding energy; Methyl Orange 4-(4-dimethyl amino)phenylazo benzenesulfonic acid sodium salt
• ISSN: 1387-7003; 1879-0259
• DOI: 10.1016/j.inoche.2022.109975

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•The micelles self-degraded Polypyrrole Nanotube-Cobalt Oxide (PPYNTs/Co3O4) Nanocomposite has been synthesized by using In situ polymerization and hydrothermal chemical route.•The modified PPYNTs/Co3O4 GCE electrochemical detection of Ascorbic acid shows a wide linear range from 5 μM to 80 μM, low LOD is 0.23 μM, and exhibits high sensitivity 14.48 μA μM−1 cm−2.•The fabricated PPYNTs/Co3O4 GCE sensor electrode was used for real sample analysis showed excellent recovery response in the range of 100.72 % to 105.26 %, with RSD less than 2.0 %.
A novel micelles self-degraded Polypyrrole Nanotube-Cobalt Oxide (PPYNTs/Co3O4) nanocomposite has been synthesized by using In situ-polymerization and hydrothermal route and examined the performance of electrochemical sensor for detection of Ascorbic Acid. In this present work, Co3O4 sensing material plays an important role in detecting target analyte of Ascorbic acid due to cobalt oxide having a rich oxidation state of Co3+, Co2+ and conjugated PPYNTs bounded nitrogen group with amine and imine chain. This functional group makes easily adsorbs the analyte which may help to show high oxidation activity. The modified PPYNTs/Co3O4 GCE electrochemical detection of Ascorbic acid possesses a wide linear range from 5 μM to 80 μM, a low LOD of 0.23 μM, and exhibits a high sensitivity of 14.48 μA μM−1 cm−2 respectively. The PPYNTs/Co3O4 GCE electroactive material is highly favourable for the electrochemical detection of Ascorbic acid, and a developed sensor was used in real sample analysis, with ascorbic acid recoveries ranging from 100.72 % to 105.26 %, and an achieved RSD ranging between 0.94 % and 2.0 %.