Graphitic Carbon Nitride/MOFs Hybrid Composite as Highly Selective and Sensitive Electrodes for Calcium Ion Detection
The metal–organic framework (MOF) is a class of materials that exhibits a notable capacity for electron transfer. This unique framework design offers potential applications in various fields, including catalysis, gas storage, and sensing. Herein, we focused on a specific type of MOF called Ti-MOF. T...
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MDPI AG
2023-12-01
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| Series: | Molecules |
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| Online Access: | https://www.mdpi.com/1420-3049/28/24/8149 |
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| author | Ahmed S. Abou-Elyazed Shilin Li Gehad G. Mohamed Xiaolin Li Jing Meng Safa S. EL-Sanafery |
| author_facet | Ahmed S. Abou-Elyazed Shilin Li Gehad G. Mohamed Xiaolin Li Jing Meng Safa S. EL-Sanafery |
| author_sort | Ahmed S. Abou-Elyazed |
| collection | DOAJ |
| description | The metal–organic framework (MOF) is a class of materials that exhibits a notable capacity for electron transfer. This unique framework design offers potential applications in various fields, including catalysis, gas storage, and sensing. Herein, we focused on a specific type of MOF called Ti-MOF. To enhance its properties and functionality, the composite material was prepared by incorporating graphitic carbon nitride (g-C<sub>3</sub>N<sub>4</sub>) into the Ti-MOF structure. This composite, known as g-C<sub>3</sub>N<sub>4</sub>@Ti-MOF, was selected as the active material for ion detection, specifically targeting calcium ions (Ca<sup>2+</sup>). To gain a comprehensive understanding of the structural and chemical properties of the g-C<sub>3</sub>N<sub>4</sub>@Ti-MOF composite, several analytical techniques were employed to characterize the prepared g-C<sub>3</sub>N<sub>4</sub>@Ti-MOF composite, including X-ray diffraction (XRD), SEM-EDX, and FT-IR. For comparison, different pastes were prepared by mixing Ti-MOF or g-C<sub>3</sub>N<sub>4</sub>@Ti-MOF, graphite, and <i>o</i>-NPOE as a plasticizer. The divalent Nernstian responses of the two best electrodes, I and II, were 28.15 ± 0.47 and 29.80 ± 0.66 mV decade<sup>−1</sup>, respectively, with concentration ranges of 1 µM–1 mM and 0.1 µM–1 mM with a content 1.0 mg Ti-MOF: 250 mg graphite: 0.1 mL <i>o</i>-NPOE and 0.5 mg g-C<sub>3</sub>N<sub>4</sub>@Ti-MOF: 250 mg graphite: 0.1 mL <i>o</i>-NPOE, respectively. The electrodes showed high sensitivity and selectivity for Ca<sup>2+</sup> ions over different species. The suggested electrodes have been successfully employed for Ca<sup>2+</sup> ion measurement in various real samples with excellent precision (RSD = 0.74–1.30%) and accuracy (recovery = 98.5–100.2%), and they exhibited good agreement with the HPLC. |
| first_indexed | 2024-03-08T20:29:41Z |
| format | Article |
| id | doaj.art-20f925c4d91b4bacacc03fda2c08e842 |
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| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-03-08T20:29:41Z |
| publishDate | 2023-12-01 |
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| spelling | doaj.art-20f925c4d91b4bacacc03fda2c08e8422023-12-22T14:28:02ZengMDPI AGMolecules1420-30492023-12-012824814910.3390/molecules28248149Graphitic Carbon Nitride/MOFs Hybrid Composite as Highly Selective and Sensitive Electrodes for Calcium Ion DetectionAhmed S. Abou-Elyazed0Shilin Li1Gehad G. Mohamed2Xiaolin Li3Jing Meng4Safa S. EL-Sanafery5Institute of Intelligent Manufacturing Technology, Shenzhen Polytechnic University, Shenzhen 518055, ChinaInstitute of Intelligent Manufacturing Technology, Shenzhen Polytechnic University, Shenzhen 518055, ChinaChemistry Department, Faculty of Science, Cairo University, Giza 12613, EgyptInstitute of Intelligent Manufacturing Technology, Shenzhen Polytechnic University, Shenzhen 518055, ChinaSchool of Civil and Environmental Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, ChinaChemistry Department, Faculty of Science, Menoufia University, Shebin El-Kom 32512, EgyptThe metal–organic framework (MOF) is a class of materials that exhibits a notable capacity for electron transfer. This unique framework design offers potential applications in various fields, including catalysis, gas storage, and sensing. Herein, we focused on a specific type of MOF called Ti-MOF. To enhance its properties and functionality, the composite material was prepared by incorporating graphitic carbon nitride (g-C<sub>3</sub>N<sub>4</sub>) into the Ti-MOF structure. This composite, known as g-C<sub>3</sub>N<sub>4</sub>@Ti-MOF, was selected as the active material for ion detection, specifically targeting calcium ions (Ca<sup>2+</sup>). To gain a comprehensive understanding of the structural and chemical properties of the g-C<sub>3</sub>N<sub>4</sub>@Ti-MOF composite, several analytical techniques were employed to characterize the prepared g-C<sub>3</sub>N<sub>4</sub>@Ti-MOF composite, including X-ray diffraction (XRD), SEM-EDX, and FT-IR. For comparison, different pastes were prepared by mixing Ti-MOF or g-C<sub>3</sub>N<sub>4</sub>@Ti-MOF, graphite, and <i>o</i>-NPOE as a plasticizer. The divalent Nernstian responses of the two best electrodes, I and II, were 28.15 ± 0.47 and 29.80 ± 0.66 mV decade<sup>−1</sup>, respectively, with concentration ranges of 1 µM–1 mM and 0.1 µM–1 mM with a content 1.0 mg Ti-MOF: 250 mg graphite: 0.1 mL <i>o</i>-NPOE and 0.5 mg g-C<sub>3</sub>N<sub>4</sub>@Ti-MOF: 250 mg graphite: 0.1 mL <i>o</i>-NPOE, respectively. The electrodes showed high sensitivity and selectivity for Ca<sup>2+</sup> ions over different species. The suggested electrodes have been successfully employed for Ca<sup>2+</sup> ion measurement in various real samples with excellent precision (RSD = 0.74–1.30%) and accuracy (recovery = 98.5–100.2%), and they exhibited good agreement with the HPLC.https://www.mdpi.com/1420-3049/28/24/8149metal-organic frameworkgraphitic carbon nitridecarbon-paste electrodesHPLCSSMMPM |
| spellingShingle | Ahmed S. Abou-Elyazed Shilin Li Gehad G. Mohamed Xiaolin Li Jing Meng Safa S. EL-Sanafery Graphitic Carbon Nitride/MOFs Hybrid Composite as Highly Selective and Sensitive Electrodes for Calcium Ion Detection Molecules metal-organic framework graphitic carbon nitride carbon-paste electrodes HPLC SSM MPM |
| title | Graphitic Carbon Nitride/MOFs Hybrid Composite as Highly Selective and Sensitive Electrodes for Calcium Ion Detection |
| title_full | Graphitic Carbon Nitride/MOFs Hybrid Composite as Highly Selective and Sensitive Electrodes for Calcium Ion Detection |
| title_fullStr | Graphitic Carbon Nitride/MOFs Hybrid Composite as Highly Selective and Sensitive Electrodes for Calcium Ion Detection |
| title_full_unstemmed | Graphitic Carbon Nitride/MOFs Hybrid Composite as Highly Selective and Sensitive Electrodes for Calcium Ion Detection |
| title_short | Graphitic Carbon Nitride/MOFs Hybrid Composite as Highly Selective and Sensitive Electrodes for Calcium Ion Detection |
| title_sort | graphitic carbon nitride mofs hybrid composite as highly selective and sensitive electrodes for calcium ion detection |
| topic | metal-organic framework graphitic carbon nitride carbon-paste electrodes HPLC SSM MPM |
| url | https://www.mdpi.com/1420-3049/28/24/8149 |
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