A copper-based metal–organic framework decorated with electrodeposited Fe2O3 nanoparticles for electrochemical nitrite sensing
An amperometric nitrite sensor is reported based on a screen-printed carbon electrode (SPCE) modified with copper(II)-benzene-1,4-dicarboxylate (Cu-BDC) frameworks and iron(III) oxide nanoparticles (Fe2O3 NPs). First, copper(I) oxide (Cu2O) nanocubes were synthesized, followed by a solvothermal reac...
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my.upm.eprints.1001122024-08-01T04:14:43Z http://psasir.upm.edu.my/id/eprint/100112/ A copper-based metal–organic framework decorated with electrodeposited Fe2O3 nanoparticles for electrochemical nitrite sensing Amali, R. K. A. Lim, H. N. Ibrahim, I. Zainal, Z. Ahmad, S. A. A. An amperometric nitrite sensor is reported based on a screen-printed carbon electrode (SPCE) modified with copper(II)-benzene-1,4-dicarboxylate (Cu-BDC) frameworks and iron(III) oxide nanoparticles (Fe2O3 NPs). First, copper(I) oxide (Cu2O) nanocubes were synthesized, followed by a solvothermal reaction between Cu2O and H2BDC to form square plate-like Cu-BDC frameworks. Then, Fe2O3 NPs were electrodeposited on Cu-BDC frameworks using a potentiostatic method. The Fe2O3@Cu-BDC nanocomposite benefits from high conductivity and large active surface area, offering excellent electrocatalytic activity for nitrite oxidation. Under optimal amperometric conditions (0.55 V vs. Ag/AgCl), the sensor has a linear range of 1 to 2000 µM with a detection limit of 0.074 µM (S/N = 3) and sensitivity of 220.59 µA mM−1 cm−2. The sensor also provides good selectivity and reproducibility (RSD = 1.91%, n = 5). Furthermore, the sensor exhibits long-term stability, retaining 91.4% of its original current after 4 weeks of storage at room temperature. Finally, assessing nitrite in tap and mineral water samples revealed that the Fe2O3@Cu-BDC/SPCE has a promising prospect in amperometric nitrite detection. Springer 2022-08-30 Article PeerReviewed Amali, R. K. A. and Lim, H. N. and Ibrahim, I. and Zainal, Z. and Ahmad, S. A. A. (2022) A copper-based metal–organic framework decorated with electrodeposited Fe2O3 nanoparticles for electrochemical nitrite sensing. Microchimica Acta, 189. art. no. 356. ISSN 0026-3672; ESSN: 1436-5073 https://link.springer.com/article/10.1007/s00604-022-05450-y? 10.1007/s00604-022-05450-y |
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An amperometric nitrite sensor is reported based on a screen-printed carbon electrode (SPCE) modified with copper(II)-benzene-1,4-dicarboxylate (Cu-BDC) frameworks and iron(III) oxide nanoparticles (Fe2O3 NPs). First, copper(I) oxide (Cu2O) nanocubes were synthesized, followed by a solvothermal reaction between Cu2O and H2BDC to form square plate-like Cu-BDC frameworks. Then, Fe2O3 NPs were electrodeposited on Cu-BDC frameworks using a potentiostatic method. The Fe2O3@Cu-BDC nanocomposite benefits from high conductivity and large active surface area, offering excellent electrocatalytic activity for nitrite oxidation. Under optimal amperometric conditions (0.55 V vs. Ag/AgCl), the sensor has a linear range of 1 to 2000 µM with a detection limit of 0.074 µM (S/N = 3) and sensitivity of 220.59 µA mM−1 cm−2. The sensor also provides good selectivity and reproducibility (RSD = 1.91%, n = 5). Furthermore, the sensor exhibits long-term stability, retaining 91.4% of its original current after 4 weeks of storage at room temperature. Finally, assessing nitrite in tap and mineral water samples revealed that the Fe2O3@Cu-BDC/SPCE has a promising prospect in amperometric nitrite detection. |
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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. A copper-based metal–organic framework decorated with electrodeposited Fe2O3 nanoparticles for 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 |
A copper-based metal–organic framework decorated with electrodeposited Fe2O3 nanoparticles for electrochemical nitrite sensing |
| title_short |
A copper-based metal–organic framework decorated with electrodeposited Fe2O3 nanoparticles for electrochemical nitrite sensing |
| title_full |
A copper-based metal–organic framework decorated with electrodeposited Fe2O3 nanoparticles for electrochemical nitrite sensing |
| title_fullStr |
A copper-based metal–organic framework decorated with electrodeposited Fe2O3 nanoparticles for electrochemical nitrite sensing |
| title_full_unstemmed |
A copper-based metal–organic framework decorated with electrodeposited Fe2O3 nanoparticles for electrochemical nitrite sensing |
| title_sort |
copper-based metal–organic framework decorated with electrodeposited fe2o3 nanoparticles for electrochemical nitrite sensing |
| publisher |
Springer |
| publishDate |
2022 |
| url |
http://psasir.upm.edu.my/id/eprint/100112/ https://link.springer.com/article/10.1007/s00604-022-05450-y? |
| _version_ |
1806446353942839296 |
| score |
13.211869 |