Highly Sensitive and Selective Eco-Toxic 4-Nitrophenol Chemical Sensor Based on Ag-Doped ZnO Nanoflowers Decorated with Nanosheets
Herein, we have developed a novel sensing electrode to detect the eco-toxic 4-nitrophenol (4-NP). Ag-doped-ZnO nanoflowers were synthesized by facile hydrothermal method and examined by several characterization techniques in order to understand the morphology, crystal structure, composition, and sur...
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MDPI AG
2021-07-01
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| Series: | Molecules |
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| Online Access: | https://www.mdpi.com/1420-3049/26/15/4619 |
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| author | Ahmad Umar M. Shaheer Akhtar Hassan Algadi Ahmed A. Ibrahim Mohsen A. M. Alhamami Sotirios Baskoutas |
| author_facet | Ahmad Umar M. Shaheer Akhtar Hassan Algadi Ahmed A. Ibrahim Mohsen A. M. Alhamami Sotirios Baskoutas |
| author_sort | Ahmad Umar |
| collection | DOAJ |
| description | Herein, we have developed a novel sensing electrode to detect the eco-toxic 4-nitrophenol (4-NP). Ag-doped-ZnO nanoflowers were synthesized by facile hydrothermal method and examined by several characterization techniques in order to understand the morphology, crystal structure, composition, and surface properties. Morphological results were confirmed by the formation of Ag-doped ZnO nanoflowers decorated with nanosheets. Ag-doped ZnO/glassy carbon electrode (GCE) electrode-material-matrix was used for electrochemical sensing of toxic 4-NP. Under optimized conditions, Ag-doped ZnO/GCE modified electrode exhibits high-sensitivity and selectivity compared to the bare GCE electrode. The Ag-doped ZnO/GCE modified electrode exhibits high electrocatalytic oxidation towards 4-NP. Anodic peak current of 4-NP is increased linearly by increasing the concentration of nitrophenol. Additionally, Ag-doped ZnO/GCE shows a wide range of sensitivity from 10 µM to 500 µM, and a linear calibration plot with a good detection limit of 3 µM (S/N = 3). The proposed Ag-doped ZnO/GCE modified electrode showed high sensing stability. In addition, the oxidation mechanism was studied. The obtained results revealed that the Ag-ZnO/GCE electrode could be the promising sensing electrode for 4-NP sensing. |
| first_indexed | 2024-03-10T09:10:45Z |
| format | Article |
| id | doaj.art-0da1b78755694e8082cc839e0f9e4ff6 |
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| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-03-10T09:10:45Z |
| publishDate | 2021-07-01 |
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| series | Molecules |
| spelling | doaj.art-0da1b78755694e8082cc839e0f9e4ff62023-11-22T06:00:47ZengMDPI AGMolecules1420-30492021-07-012615461910.3390/molecules26154619Highly Sensitive and Selective Eco-Toxic 4-Nitrophenol Chemical Sensor Based on Ag-Doped ZnO Nanoflowers Decorated with NanosheetsAhmad Umar0M. Shaheer Akhtar1Hassan Algadi2Ahmed A. Ibrahim3Mohsen A. M. Alhamami4Sotirios Baskoutas5Department of Chemistry, Faculty of Science and Arts, Najran University, P.O. Box 1988, Najran 11001, Saudi ArabiaNew & Renewable Energy Material Development Center (NewREC), Jeonbuk National University, Jeonju-si, Jeollabuk-do 54896, KoreaPromising Centre for Sensors and Electronic Devices (PCSED), Najran University, P.O. Box 1988, Najran 11001, Saudi ArabiaDepartment of Chemistry, Faculty of Science and Arts, Najran University, P.O. Box 1988, Najran 11001, Saudi ArabiaDepartment of Chemistry, Faculty of Science and Arts, Najran University, P.O. Box 1988, Najran 11001, Saudi ArabiaDepartment of Materials Science, University of Patras, GR-26504 Patras, GreeceHerein, we have developed a novel sensing electrode to detect the eco-toxic 4-nitrophenol (4-NP). Ag-doped-ZnO nanoflowers were synthesized by facile hydrothermal method and examined by several characterization techniques in order to understand the morphology, crystal structure, composition, and surface properties. Morphological results were confirmed by the formation of Ag-doped ZnO nanoflowers decorated with nanosheets. Ag-doped ZnO/glassy carbon electrode (GCE) electrode-material-matrix was used for electrochemical sensing of toxic 4-NP. Under optimized conditions, Ag-doped ZnO/GCE modified electrode exhibits high-sensitivity and selectivity compared to the bare GCE electrode. The Ag-doped ZnO/GCE modified electrode exhibits high electrocatalytic oxidation towards 4-NP. Anodic peak current of 4-NP is increased linearly by increasing the concentration of nitrophenol. Additionally, Ag-doped ZnO/GCE shows a wide range of sensitivity from 10 µM to 500 µM, and a linear calibration plot with a good detection limit of 3 µM (S/N = 3). The proposed Ag-doped ZnO/GCE modified electrode showed high sensing stability. In addition, the oxidation mechanism was studied. The obtained results revealed that the Ag-ZnO/GCE electrode could be the promising sensing electrode for 4-NP sensing.https://www.mdpi.com/1420-3049/26/15/4619Ag-doped ZnOnanoflowerselectrochemical sensor4-nitrophenoloxidation |
| spellingShingle | Ahmad Umar M. Shaheer Akhtar Hassan Algadi Ahmed A. Ibrahim Mohsen A. M. Alhamami Sotirios Baskoutas Highly Sensitive and Selective Eco-Toxic 4-Nitrophenol Chemical Sensor Based on Ag-Doped ZnO Nanoflowers Decorated with Nanosheets Molecules Ag-doped ZnO nanoflowers electrochemical sensor 4-nitrophenol oxidation |
| title | Highly Sensitive and Selective Eco-Toxic 4-Nitrophenol Chemical Sensor Based on Ag-Doped ZnO Nanoflowers Decorated with Nanosheets |
| title_full | Highly Sensitive and Selective Eco-Toxic 4-Nitrophenol Chemical Sensor Based on Ag-Doped ZnO Nanoflowers Decorated with Nanosheets |
| title_fullStr | Highly Sensitive and Selective Eco-Toxic 4-Nitrophenol Chemical Sensor Based on Ag-Doped ZnO Nanoflowers Decorated with Nanosheets |
| title_full_unstemmed | Highly Sensitive and Selective Eco-Toxic 4-Nitrophenol Chemical Sensor Based on Ag-Doped ZnO Nanoflowers Decorated with Nanosheets |
| title_short | Highly Sensitive and Selective Eco-Toxic 4-Nitrophenol Chemical Sensor Based on Ag-Doped ZnO Nanoflowers Decorated with Nanosheets |
| title_sort | highly sensitive and selective eco toxic 4 nitrophenol chemical sensor based on ag doped zno nanoflowers decorated with nanosheets |
| topic | Ag-doped ZnO nanoflowers electrochemical sensor 4-nitrophenol oxidation |
| url | https://www.mdpi.com/1420-3049/26/15/4619 |
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