Photoelectrocatalytic Detection and Degradation Studies of a Hazardous Textile Dye Safranin T
Herein, we report an electrochemical scaffold consisting of functionalized multiwalled carbon nanotubes (COOH-<i>f</i>MWCNTs) and iron-doped zinc oxide nanoparticles (Fe-ZnO) for the detection of a hazardous textile dye safranin T (ST) and monitoring of its photocatalytic degradation. Pr...
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| Format: | Article |
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MDPI AG
2023-07-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/13/15/2218 |
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| author | Muhammad Usman Sadiq Afzal Shah Jan Nisar Iltaf Shah |
| author_facet | Muhammad Usman Sadiq Afzal Shah Jan Nisar Iltaf Shah |
| author_sort | Muhammad Usman Sadiq |
| collection | DOAJ |
| description | Herein, we report an electrochemical scaffold consisting of functionalized multiwalled carbon nanotubes (COOH-<i>f</i>MWCNTs) and iron-doped zinc oxide nanoparticles (Fe-ZnO) for the detection of a hazardous textile dye safranin T (ST) and monitoring of its photocatalytic degradation. Prior to the detection and degradation analysis, Fe-ZnO NPs were synthesized by the sol-gel method and characterized by a number of structural and morphological techniques. The carboxyl moiety of COOH-<i>f</i>MWCNTs possessing a strong affinity for the amino functionality of ST led to significant enhancement of the current response at the designed electrochemical platform, whereas the electrocatalytic role, surface area enhancement, and the provision of binding sites of Fe-ZnO led to a further increase in the peak current intensity of ST. Electrochemical impedance spectroscopy showed that the sensing scaffold made of the glassy carbon electrode modified with COOH-<i>f</i>MWCNTs and Fe-ZnO efficiently transfers charge between the transducer and the redox probe. Under optimized conditions, the developed sensor showed a 2.3 nM limit of detection for ST. Moreover, recovery experiments and anti-interference tests qualified the sensing platform for practical applications. The dye was photocatalytically degraded using Fe-ZnO NPs up to 99% in 60 min with a rate constant of 0.068 min<sup>−1</sup>. The designed sensor was used to probe the degradation kinetics of the target dye, and the results were found consistent with the findings obtained from electronic absorption method. To the best of our knowledge, the present work is the first approach for the efficient detection and almost absolute degradation of ST. |
| first_indexed | 2024-03-11T00:20:12Z |
| format | Article |
| id | doaj.art-195172640d3749249a2c3d7886d66d46 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-11T00:20:12Z |
| publishDate | 2023-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-195172640d3749249a2c3d7886d66d462023-11-18T23:21:43ZengMDPI AGNanomaterials2079-49912023-07-011315221810.3390/nano13152218Photoelectrocatalytic Detection and Degradation Studies of a Hazardous Textile Dye Safranin TMuhammad Usman Sadiq0Afzal Shah1Jan Nisar2Iltaf Shah3Department of Chemistry, Quaid-i-Azam University, Islamabad 45320, PakistanDepartment of Chemistry, Quaid-i-Azam University, Islamabad 45320, PakistanNational Center of Excellence in Physical Chemistry, University of Peshawar, Peshawar 25120, PakistanDepartment of Chemistry, College of Science, United Arab Emirates University, Al Ain P.O. Box 15551, United Arab EmiratesHerein, we report an electrochemical scaffold consisting of functionalized multiwalled carbon nanotubes (COOH-<i>f</i>MWCNTs) and iron-doped zinc oxide nanoparticles (Fe-ZnO) for the detection of a hazardous textile dye safranin T (ST) and monitoring of its photocatalytic degradation. Prior to the detection and degradation analysis, Fe-ZnO NPs were synthesized by the sol-gel method and characterized by a number of structural and morphological techniques. The carboxyl moiety of COOH-<i>f</i>MWCNTs possessing a strong affinity for the amino functionality of ST led to significant enhancement of the current response at the designed electrochemical platform, whereas the electrocatalytic role, surface area enhancement, and the provision of binding sites of Fe-ZnO led to a further increase in the peak current intensity of ST. Electrochemical impedance spectroscopy showed that the sensing scaffold made of the glassy carbon electrode modified with COOH-<i>f</i>MWCNTs and Fe-ZnO efficiently transfers charge between the transducer and the redox probe. Under optimized conditions, the developed sensor showed a 2.3 nM limit of detection for ST. Moreover, recovery experiments and anti-interference tests qualified the sensing platform for practical applications. The dye was photocatalytically degraded using Fe-ZnO NPs up to 99% in 60 min with a rate constant of 0.068 min<sup>−1</sup>. The designed sensor was used to probe the degradation kinetics of the target dye, and the results were found consistent with the findings obtained from electronic absorption method. To the best of our knowledge, the present work is the first approach for the efficient detection and almost absolute degradation of ST.https://www.mdpi.com/2079-4991/13/15/2218electrochemical sensorsafranin Thazardous dyenanomolar detectionphotocatalytic degradationnanomaterials |
| spellingShingle | Muhammad Usman Sadiq Afzal Shah Jan Nisar Iltaf Shah Photoelectrocatalytic Detection and Degradation Studies of a Hazardous Textile Dye Safranin T Nanomaterials electrochemical sensor safranin T hazardous dye nanomolar detection photocatalytic degradation nanomaterials |
| title | Photoelectrocatalytic Detection and Degradation Studies of a Hazardous Textile Dye Safranin T |
| title_full | Photoelectrocatalytic Detection and Degradation Studies of a Hazardous Textile Dye Safranin T |
| title_fullStr | Photoelectrocatalytic Detection and Degradation Studies of a Hazardous Textile Dye Safranin T |
| title_full_unstemmed | Photoelectrocatalytic Detection and Degradation Studies of a Hazardous Textile Dye Safranin T |
| title_short | Photoelectrocatalytic Detection and Degradation Studies of a Hazardous Textile Dye Safranin T |
| title_sort | photoelectrocatalytic detection and degradation studies of a hazardous textile dye safranin t |
| topic | electrochemical sensor safranin T hazardous dye nanomolar detection photocatalytic degradation nanomaterials |
| url | https://www.mdpi.com/2079-4991/13/15/2218 |
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