Non-Enzymatic Electrochemical Detection of Glucose by Mixed-Valence Cobalt Containing Keggin Polyoxometalate/Multi-Walled Carbon Nanotube Composite

Autor: Yasemin Torlak, Rukiye Ayranci, Metin Ak
Rok vydání: 2019
Předmět:
Multiwalled carbon nanotubes (MWCN)
Cyclic voltammetry
Multi-Walled Carbon Nanotube
Composite films
Composite number
law.invention
law
Materials Chemistry
Electrochemistry
Electrochemical detection
Cobalt compounds
Nanotubes
MWCNT
Condensed Matter Physics
Surfaces
Coatings and Films
Electronic
Optical and Magnetic Materials
Mixed-Valence
Electrochemical sensor platform
Electrochemical oxidation
Polyoxometalate
Electroanalytical performance
Graphite
Electrocatalytic properties
Glucose sensors
Keggin type
Cobalt
Graphite electrodes
Amperometric measurements
Materials science
Carbon-nanotube composites
Inorganic chemistry
Chemical detection
chemistry.chemical_element
Carbon nanotube
Keggin type polyoxometalate
Non enzymatic
Yarn
Electrochemical sensors
Keggin polyoxometalateN
Keggin polyoxometalate
Valence (chemistry)
Renewable Energy
Sustainability and the Environment
Polyoxometalates
Direct electrochemical oxidation
Electrochemical electrodes
Non-enzymatic biosensors
Glucose
chemistry
Non-enzymatic sensors
Zdroj: Journal of The Electrochemical Society. 166:B205-B211
ISSN: 1945-7111
0013-4651
DOI: 10.1149/2.0581904jes
Popis: In this work, a non-enzymatic electrochemical sensor platform was developed for catalyze of glucose using graphite electrode modifiedwithKeggin typeK7[CoIIICoII(H2O)W11O39].15H2O(Co-POM) and multi-walled carbon nanotube (MWCNT) composite. The Keggin type Co-POM composing of a unique mixed-valence Co(III) and Co(II) structures was confined in a matrix of MWCNT on graphite electrodes to improve the electron transfers. Cyclic voltammetry (CV) and amperometric measurements were performed to investigate the electroanalytical performance of the Co-POM/MWCNT composite for direct electrochemical oxidation of glucose. The proposed this non-enzymatic sensor platform showed a wide linear range from 0.1 mM to 10.0 mM (R = 0.9937) for detection of glucose. Besides it exhibited low detection limit of 1.21 ìM and fast response time of 6s and high sensitivity of 256.4 μAmM-1 cm-2. The results demonstrated that the proposed Co-POM/MWCNT based sensor platform has a high sensitivity, good stability, excellent selectivity, an enhanced electrocatalytic property and acceptable recovery. Therefore, Co-POM/MWCNT based sensor platform is promising potential application for the development of non-enzymatic sensor and catalyst applications. © 2019 The Electrochemical Society.
Databáze: OpenAIRE
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