Fabrication of Efficient and Selective Modified Graphene Paste Sensor for the Determination of Catechol and Hydroquinone
An electrochemical sensor, based on a graphene paste electrode (GPE), was modified with a polymerization method, and the electrochemical behavior of catechol (CC) and hydroquinone (HQ) was investigated using electroanalytical methods like cyclic voltammetry (CV) and differential pulse voltammetry (D...
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MDPI AG
2020-09-01
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| Series: | Surfaces |
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| Online Access: | https://www.mdpi.com/2571-9637/3/3/34 |
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| author | Jamballi G. Manjunatha |
| author_facet | Jamballi G. Manjunatha |
| author_sort | Jamballi G. Manjunatha |
| collection | DOAJ |
| description | An electrochemical sensor, based on a graphene paste electrode (GPE), was modified with a polymerization method, and the electrochemical behavior of catechol (CC) and hydroquinone (HQ) was investigated using electroanalytical methods like cyclic voltammetry (CV) and differential pulse voltammetry (DPV). The effect of CC at the modified electrode was evidenced by the positive shift of the oxidation peak potential of CC at the poly (rosaniline)-modified graphene paste electrode (PRAMGPE) and the nine-fold enhancement of the peak current, as compared to a bare graphene paste electrode (BGPE). The sensitivity of CC investigated by DPV was more sensitive than CV for the analysis of CC. The DPV method showed the two linear ranges of 2.0 × 10<sup>−6</sup>–1.0 × 10<sup>−5</sup> M and 1.5 × 10<sup>−5</sup>–5 × 10<sup>−5</sup> M. The detection limit and limit of quantification were determined to be 8.2 × 10<sup>−7</sup> and 27.6 × 10<sup>−7</sup> M, respectively. The obtained results were compared successfully with respect to those obtained using the official method. Moreover, this sensor is applied for the selective determination of CC in the presence of HQ. The high sensitivity, good reproducibility, and wide linear range make the modified electrode suitable for the determination of CC in real samples. The practical application of the sensor was demonstrated by determining the concentration of CC in water samples with acceptable recoveries (97.5–98%). |
| first_indexed | 2024-03-10T16:35:09Z |
| format | Article |
| id | doaj.art-b310b8c9afed4221a12724f174dfdfac |
| institution | Directory Open Access Journal |
| issn | 2571-9637 |
| language | English |
| last_indexed | 2024-03-10T16:35:09Z |
| publishDate | 2020-09-01 |
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| spelling | doaj.art-b310b8c9afed4221a12724f174dfdfac2023-11-20T12:32:14ZengMDPI AGSurfaces2571-96372020-09-013347348310.3390/surfaces3030034Fabrication of Efficient and Selective Modified Graphene Paste Sensor for the Determination of Catechol and HydroquinoneJamballi G. Manjunatha0Department of Chemistry, FMKMC College, Madikeri, Mangalore University Constituent College, Karnataka 571201, IndiaAn electrochemical sensor, based on a graphene paste electrode (GPE), was modified with a polymerization method, and the electrochemical behavior of catechol (CC) and hydroquinone (HQ) was investigated using electroanalytical methods like cyclic voltammetry (CV) and differential pulse voltammetry (DPV). The effect of CC at the modified electrode was evidenced by the positive shift of the oxidation peak potential of CC at the poly (rosaniline)-modified graphene paste electrode (PRAMGPE) and the nine-fold enhancement of the peak current, as compared to a bare graphene paste electrode (BGPE). The sensitivity of CC investigated by DPV was more sensitive than CV for the analysis of CC. The DPV method showed the two linear ranges of 2.0 × 10<sup>−6</sup>–1.0 × 10<sup>−5</sup> M and 1.5 × 10<sup>−5</sup>–5 × 10<sup>−5</sup> M. The detection limit and limit of quantification were determined to be 8.2 × 10<sup>−7</sup> and 27.6 × 10<sup>−7</sup> M, respectively. The obtained results were compared successfully with respect to those obtained using the official method. Moreover, this sensor is applied for the selective determination of CC in the presence of HQ. The high sensitivity, good reproducibility, and wide linear range make the modified electrode suitable for the determination of CC in real samples. The practical application of the sensor was demonstrated by determining the concentration of CC in water samples with acceptable recoveries (97.5–98%).https://www.mdpi.com/2571-9637/3/3/34poly (rosaniline)graphene paste electrodecatecholhydroquinonecyclic voltammetrydifferential pulse voltammetry |
| spellingShingle | Jamballi G. Manjunatha Fabrication of Efficient and Selective Modified Graphene Paste Sensor for the Determination of Catechol and Hydroquinone Surfaces poly (rosaniline) graphene paste electrode catechol hydroquinone cyclic voltammetry differential pulse voltammetry |
| title | Fabrication of Efficient and Selective Modified Graphene Paste Sensor for the Determination of Catechol and Hydroquinone |
| title_full | Fabrication of Efficient and Selective Modified Graphene Paste Sensor for the Determination of Catechol and Hydroquinone |
| title_fullStr | Fabrication of Efficient and Selective Modified Graphene Paste Sensor for the Determination of Catechol and Hydroquinone |
| title_full_unstemmed | Fabrication of Efficient and Selective Modified Graphene Paste Sensor for the Determination of Catechol and Hydroquinone |
| title_short | Fabrication of Efficient and Selective Modified Graphene Paste Sensor for the Determination of Catechol and Hydroquinone |
| title_sort | fabrication of efficient and selective modified graphene paste sensor for the determination of catechol and hydroquinone |
| topic | poly (rosaniline) graphene paste electrode catechol hydroquinone cyclic voltammetry differential pulse voltammetry |
| url | https://www.mdpi.com/2571-9637/3/3/34 |
| work_keys_str_mv | AT jamballigmanjunatha fabricationofefficientandselectivemodifiedgraphenepastesensorforthedeterminationofcatecholandhydroquinone |