Facile Green Preparation of Reduced Graphene Oxide Using Citrus Limetta-Decorated rGO/TiO2 Nanostructures for Glucose Sensing

The important electrochemical measurements of reduced graphene oxide-titanium oxide (rGO)/TiO2) electrodes for the application of a glucose sensor are reported in the proposed work. Investigating the sensitivity, stability, and reproducibility of sensor electrodes that were made and used to evaluate...

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Published inElectronics (Basel) Vol. 12; no. 2; p. 294
Main Authors Gijare, Medha, Chaudhari, Sharmila, Ekar, Satish, Shaikh, Shoyebmohamad F., Mane, Rajaram S., Pandit, Bidhan, Siddiqui, Muhammad Usman Hassan, Garje, Anil
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.01.2023
Subjects
Biosensors
Carbon
Chemicals
Citrus fruits
Diabetes
Electrodes
Environmental impact
Flavonoids
Fluorine
Glucose
Graphene
Graphite
Metal oxides
Phytochemicals
Polyphenols
Polyvinyl alcohol
Reproducibility
Response time
Sensitivity
Sensors
Stability
Substrates
Tin oxides
Titanium dioxide
Titanium oxides
India
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Summary:The important electrochemical measurements of reduced graphene oxide-titanium oxide (rGO)/TiO2) electrodes for the application of a glucose sensor are reported in the proposed work. Investigating the sensitivity, stability, and reproducibility of sensor electrodes that were made and used to evaluate the concentration of glucose in the serum is one of the novel aspects of this work. This study presents the use of citrus limetta (sweet lime) fruit peel waste to synthesize a green reduction of graphene oxide (rGO). The rGO/TiO2 composite obtained using the microwave heating method is applied for measuring the structural and morphological properties by various means. A conducting fluorine-tin oxide substrate is used to modify the enzymeless glucose sensor electrode. The electrochemical measurements of rGO/TiO2 sensor electrodes are carried out using the technique of cyclic voltammetry. The rGO/TiO2 sensor electrode exhibits a high sensitivity of 1425 µA/mM cm2 towards glucose concentration in the range of 0.1 to 12 mM. The sensor was found to be extremely stable and repeatable with a response time of 5 s along with a minimum detection limit of 0.32 μM of glucose. The rGO/TiO2 sensor shows relative standard deviation (RSD) of 1.14%, 1.34%, and 1.3% which reveals its excellent stability, repeatability, and reproducibility respectively. The sensor was used for glucose level detection in natural blood serum and shows an RSD of 1.88%. which is in good agreement with the commercial glucose sensor values.
ISSN:2079-9292
2079-9292
DOI:10.3390/electronics12020294