دورية أكاديمية
Efficient Electrochemical Lead Detection by a Histidine-Grafted Metal–Organic Framework MOF-808 Electrode Material
| العنوان: | Efficient Electrochemical Lead Detection by a Histidine-Grafted Metal–Organic Framework MOF-808 Electrode Material |
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| المؤلفون: | Sherman Lesly Zambou Jiokeng, Tobie J. Matemb Ma Ntep, Marcus N. A. Fetzer, Till Strothmann, Cyrille G. Fotsop, Ignas Kenfack Tonle, Christoph Janiak |
| سنة النشر: | 2024 |
| مصطلحات موضوعية: | Biophysics, Biotechnology, Sociology, Space Science, Chemical Sciences not elsewhere classified, μa l μmol, tap water sample, electrochemical impedance spectroscopy, cn )< sub, 80 × 10, 12 × 10, 10 μmol l, 10 × 10, glassy carbon electrode, novel electrochemical sensor, kinetic studies gave, highly sensitive determination, 6 ± 0, 2 +, 808 electrode material, ± 0, electrode surface, stability studies, sensitive methods, proposed sensor, thin film, swasv ), results indicated, remarkable limit, noise ratio |
| الوصف: | As the excessive presence of heavy metals in the environment significantly affects human health, it becomes necessary to develop efficient, selective, and sensitive methods for their detection. In this study, a novel electrochemical sensor for the detection of Pb 2+ ions is described. The proposed sensor is based on a glassy carbon electrode (GCE) modified by a thin film of histidine-grafted metal–organic framework (MOF-808-His). The MOF-808 was obtained solvothermally, and then postsynthetically modified by substituting the coordinated acetate with histidinate. By electrochemistry, the MOF-808-His-modified GCE demonstrated high charge selectivity, while electrochemical impedance spectroscopy (EIS) and kinetic studies gave a lower charge transfer resistance (4196 Ω) and a better standard heterogeneous electron transfer rate constant (1.80 × 10 –5 cm s –1 ) on MOF-808-modified GCE. These results indicated a swift and direct electron transfer rate from [Fe(CN) 6 ] 3–/4– to the electrode surface. Using square wave anodic stripping voltammetry (SWASV), the rapid and highly sensitive determination of Pb 2+ was achieved on MOF-808-His-modified GCE. By optimizing the accumulation-detection parameters including pH of the detection medium, deposition time and potential, and concentration, a remarkable limit of detection (LoD, based on a signal-to-noise ratio of 3) of (1.12 × 10 –10 ± 0.10 × 10 –10 ) mol L –1 was obtained, with a sensitivity of (9.6 ± 0.1) μA L μmol –1 . After interference and stability studies, the MOF-808-His-modified GCE was applied to the detection of Pb 2+ in a tap water sample with a concentration of 10 μmol L –1 Pb 2+ . |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | unknown |
| العلاقة: | https://figshare.com/articles/journal_contribution/Efficient_Electrochemical_Lead_Detection_by_a_Histidine-Grafted_Metal_Organic_Framework_MOF-808_Electrode_Material/24938555Test |
| DOI: | 10.1021/acsami.3c15931.s001 |
| الإتاحة: | https://doi.org/10.1021/acsami.3c15931.s001Test https://figshare.com/articles/journal_contribution/Efficient_Electrochemical_Lead_Detection_by_a_Histidine-Grafted_Metal_Organic_Framework_MOF-808_Electrode_Material/24938555Test |
| حقوق: | CC BY-NC 4.0 |
| رقم الانضمام: | edsbas.D2474422 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1021/acsami.3c15931.s001 |
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