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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...

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Main Authors: Amali, R.K.A., Lim, H.N., Ibrahim, I., Zainal, Z., Ahmad, S.A.A.
Format: Article
Published: Elsevier 2023
Online Access:http://psasir.upm.edu.my/id/eprint/107681/
https://linkinghub.elsevier.com/retrieve/pii/S2352940723001415
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spelling my.upm.eprints.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
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
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.
format Article
author Amali, R.K.A.
Lim, H.N.
Ibrahim, I.
Zainal, Z.
Ahmad, S.A.A.
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
author_facet Amali, R.K.A.
Lim, H.N.
Ibrahim, I.
Zainal, Z.
Ahmad, S.A.A.
author_sort Amali, R.K.A.
title 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_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_sort energy-efficient green synthesis of metal-organic frameworks for effective electrochemical nitrite sensing
publisher Elsevier
publishDate 2023
url http://psasir.upm.edu.my/id/eprint/107681/
https://linkinghub.elsevier.com/retrieve/pii/S2352940723001415
_version_ 1814054652644163584
score 13.211869

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