Energy-efficient green synthesis of metal-organic frameworks for effective electrochemical nitrite sensing
This paper describes a green method for synthesizing a metal-organic framework (MOF) based on pyrazole-3,5- dicarboxylic acid (H3PDCA) linker and Ni2+ to detect nitrite electrochemically. The synthesis was performed at room temperature using water as a solvent, and physicochemical and electrochemica...
| Main Authors: | , , , , |
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| Format: | Article |
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Elsevier
2023
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| Online Access: | http://psasir.upm.edu.my/id/eprint/107681/ |
| _version_ | 1848864962139652096 |
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| author | Amali, R.K.A. Lim, H.N. Ibrahim, I. Zainal, Z. Ahmad, S.A.A. |
| author_facet | Amali, R.K.A. Lim, H.N. Ibrahim, I. Zainal, Z. Ahmad, S.A.A. |
| author_sort | Amali, R.K.A. |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | This paper describes a green method for synthesizing a metal-organic framework (MOF) based on pyrazole-3,5- dicarboxylic acid (H3PDCA) linker and Ni2+ to detect nitrite electrochemically. The synthesis was performed at room temperature using water as a solvent, and physicochemical and electrochemical characterizations confirmed the successful creation of Ni-PDCA. The study findings underline that the Ni-PDCA exhibited excellent electrochemical performance for nitrite oxidation due to the appreciable conductivity and high electroactive surface area offered by polyhedral Ni-PDCA crystals. In addition, the charge transfer mechanism between nitrite and the ligand contributed to the selective detection of nitrite. Under optimum amperometric settings (0.70 V vs. Ag/AgCl), Ni-PDCA-modified screen-printed carbon electrode (SPCE) exhibited a detection limit of 0.052 µM (S/ N = 3) with a sensitivity of 240 µA mMˆ’ 1 cmˆ’ 2 in a linear range of 0.1 to 1000 µM. Moreover, the sensor provided good selectivity, high stability (> 28 days), and a fast response time (< 5 s). Remarkable repeatability Relative standard deviation (RSD) = 0.87%, n = 10 and reproducibility RSD = 0.67%, n = 4 were other advantages of this sensor. Notably, the evaluation of nitrite in tap water samples confirmed that the Ni-PDCA/ SPCE has promising prospects in quantitatively detecting nitrite in real samples. Therefore, this study paves the way for a practical, cost-effective, and eco-friendly electrochemical sensing method for nitrite detection. |
| first_indexed | 2025-11-15T13:57:08Z |
| format | Article |
| id | upm-107681 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-15T13:57:08Z |
| publishDate | 2023 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-1076812024-10-07T01:50:17Z http://psasir.upm.edu.my/id/eprint/107681/ Energy-efficient green synthesis of metal-organic frameworks for effective electrochemical nitrite sensing Amali, R.K.A. Lim, H.N. Ibrahim, I. Zainal, Z. Ahmad, S.A.A. This paper describes a green method for synthesizing a metal-organic framework (MOF) based on pyrazole-3,5- dicarboxylic acid (H3PDCA) linker and Ni2+ to detect nitrite electrochemically. The synthesis was performed at room temperature using water as a solvent, and physicochemical and electrochemical characterizations confirmed the successful creation of Ni-PDCA. The study findings underline that the Ni-PDCA exhibited excellent electrochemical performance for nitrite oxidation due to the appreciable conductivity and high electroactive surface area offered by polyhedral Ni-PDCA crystals. In addition, the charge transfer mechanism between nitrite and the ligand contributed to the selective detection of nitrite. Under optimum amperometric settings (0.70 V vs. Ag/AgCl), Ni-PDCA-modified screen-printed carbon electrode (SPCE) exhibited a detection limit of 0.052 µM (S/ N = 3) with a sensitivity of 240 µA mMˆ’ 1 cmˆ’ 2 in a linear range of 0.1 to 1000 µM. Moreover, the sensor provided good selectivity, high stability (> 28 days), and a fast response time (< 5 s). Remarkable repeatability Relative standard deviation (RSD) = 0.87%, n = 10 and reproducibility RSD = 0.67%, n = 4 were other advantages of this sensor. Notably, the evaluation of nitrite in tap water samples confirmed that the Ni-PDCA/ SPCE has promising prospects in quantitatively detecting nitrite in real samples. Therefore, this study paves the way for a practical, cost-effective, and eco-friendly electrochemical sensing method for nitrite detection. Elsevier 2023-08 Article PeerReviewed Amali, R.K.A. and Lim, H.N. and Ibrahim, I. and Zainal, Z. and Ahmad, S.A.A. (2023) Energy-efficient green synthesis of metal-organic frameworks for effective electrochemical nitrite sensing. Applied Materials Today, 33. pp. 1-8. ISSN 2352-9407 https://linkinghub.elsevier.com/retrieve/pii/S2352940723001415 10.1016/j.apmt.2023.101871 |
| spellingShingle | Amali, R.K.A. Lim, H.N. Ibrahim, I. Zainal, Z. Ahmad, S.A.A. Energy-efficient green synthesis of metal-organic frameworks for effective electrochemical nitrite sensing |
| title | Energy-efficient green synthesis of metal-organic frameworks for effective electrochemical nitrite sensing |
| title_full | Energy-efficient green synthesis of metal-organic frameworks for effective electrochemical nitrite sensing |
| title_fullStr | Energy-efficient green synthesis of metal-organic frameworks for effective electrochemical nitrite sensing |
| title_full_unstemmed | Energy-efficient green synthesis of metal-organic frameworks for effective electrochemical nitrite sensing |
| title_short | Energy-efficient green synthesis of metal-organic frameworks for effective electrochemical nitrite sensing |
| title_sort | energy-efficient green synthesis of metal-organic frameworks for effective electrochemical nitrite sensing |
| url | http://psasir.upm.edu.my/id/eprint/107681/ http://psasir.upm.edu.my/id/eprint/107681/ http://psasir.upm.edu.my/id/eprint/107681/ |