Cu<sup>0</sup>-Functionalized, ZIF-8-Derived, Nitrogen-Doped Carbon Composites for Efficient Iodine Elimination in Solution
The development of copper-based materials with a high efficiency and low cost is desirable for use in iodine (I<sub>2</sub>) remediation. Herein, Cu<sup>0</sup>-nanoparticles-functionalized, ZIF-8 (Zeolite Imidazole Framework-8)-derived, nitrogen-doped carbon composites (Cu@Z...
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2025-01-01
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| author | Jiuyu Chen Chensheng Gao Jingwen Chen Fei Liu Zhiwen Liu |
| author_facet | Jiuyu Chen Chensheng Gao Jingwen Chen Fei Liu Zhiwen Liu |
| author_sort | Jiuyu Chen |
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| description | The development of copper-based materials with a high efficiency and low cost is desirable for use in iodine (I<sub>2</sub>) remediation. Herein, Cu<sup>0</sup>-nanoparticles-functionalized, ZIF-8 (Zeolite Imidazole Framework-8)-derived, nitrogen-doped carbon composites (Cu@Zn-NC) were synthesized by ball milling and pyrolysis processes. The as-prepared composites were characterized using SEM, BET, XRD, XPS, and FT-IR analyses. The results showed that the morphology of ZIF-8 changed from a leaf-like structure into an irregular structure after the introduction of a copper salt and carbonization. The copper in the pyrolysis samples was mainly in the form of Cu<sup>0</sup> particles. The presence of an appropriate amount of Cu<sup>0</sup> particles could increase the specific surface area of Cu@Zn-NC. The subsequent batch adsorption results demonstrated that the as-fabricated composites showed high I<sub>2</sub> adsorption amounts (1204.9 mg/g) and relatively fast dynamics in an iodine–cyclohexane solution when the Cu content was 30% and the pyrolysis temperature was 600 °C, outperforming the other Cu-based materials. The isothermal adsorption followed both Langmuir and Dubinin–Radushkevich isotherm models, while the kinetics of I<sub>2</sub> adsorption followed a pseudo-second-order kinetic model. The activation energy (<i>E</i><sub>α</sub>) of the adsorbent was determined to be 47.2 kJ/mol, according to the Arrhenius equation. According to the experimental and DFT analyses, I<sub>2</sub>-Zn interactions and I<sub>2</sub>-Cu<sup>0</sup> chemisorption jointly promoted the elimination of iodine. In general, this study provided an operative adsorbent for the highly effective capture of iodine in solution, which might be worth applying on a large scale. |
| format | Article |
| id | doaj-art-69f50b3916c94a59984c6fb1ba8a5e65 |
| institution | Kabale University |
| issn | 2079-4991 |
| language | English |
| publishDate | 2025-01-01 |
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| series | Nanomaterials |
| spelling | doaj-art-69f50b3916c94a59984c6fb1ba8a5e652025-01-24T13:44:09ZengMDPI AGNanomaterials2079-49912025-01-0115210510.3390/nano15020105Cu<sup>0</sup>-Functionalized, ZIF-8-Derived, Nitrogen-Doped Carbon Composites for Efficient Iodine Elimination in SolutionJiuyu Chen0Chensheng Gao1Jingwen Chen2Fei Liu3Zhiwen Liu4School of Petroleum and Natural Gas Engineering, Changzhou University, Changzhou 213164, ChinaSchool of Petroleum and Natural Gas Engineering, Changzhou University, Changzhou 213164, ChinaKey Laboratory for Protected Agricultural Engineering in the Middle and Lower Reaches of Yangtze River, Institute of Agricultural Facilities and Equipment, Jiangsu Academy of Agricultural Sciences, Ministry of Agriculture and Rural Affairs, Nanjing 210014, ChinaState Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, ChinaSchool of Petroleum and Natural Gas Engineering, Changzhou University, Changzhou 213164, ChinaThe development of copper-based materials with a high efficiency and low cost is desirable for use in iodine (I<sub>2</sub>) remediation. Herein, Cu<sup>0</sup>-nanoparticles-functionalized, ZIF-8 (Zeolite Imidazole Framework-8)-derived, nitrogen-doped carbon composites (Cu@Zn-NC) were synthesized by ball milling and pyrolysis processes. The as-prepared composites were characterized using SEM, BET, XRD, XPS, and FT-IR analyses. The results showed that the morphology of ZIF-8 changed from a leaf-like structure into an irregular structure after the introduction of a copper salt and carbonization. The copper in the pyrolysis samples was mainly in the form of Cu<sup>0</sup> particles. The presence of an appropriate amount of Cu<sup>0</sup> particles could increase the specific surface area of Cu@Zn-NC. The subsequent batch adsorption results demonstrated that the as-fabricated composites showed high I<sub>2</sub> adsorption amounts (1204.9 mg/g) and relatively fast dynamics in an iodine–cyclohexane solution when the Cu content was 30% and the pyrolysis temperature was 600 °C, outperforming the other Cu-based materials. The isothermal adsorption followed both Langmuir and Dubinin–Radushkevich isotherm models, while the kinetics of I<sub>2</sub> adsorption followed a pseudo-second-order kinetic model. The activation energy (<i>E</i><sub>α</sub>) of the adsorbent was determined to be 47.2 kJ/mol, according to the Arrhenius equation. According to the experimental and DFT analyses, I<sub>2</sub>-Zn interactions and I<sub>2</sub>-Cu<sup>0</sup> chemisorption jointly promoted the elimination of iodine. In general, this study provided an operative adsorbent for the highly effective capture of iodine in solution, which might be worth applying on a large scale.https://www.mdpi.com/2079-4991/15/2/105ZIF-8Cu<sup>0</sup> nanoparticlesiodineadsorptionDFT studies |
| spellingShingle | Jiuyu Chen Chensheng Gao Jingwen Chen Fei Liu Zhiwen Liu Cu<sup>0</sup>-Functionalized, ZIF-8-Derived, Nitrogen-Doped Carbon Composites for Efficient Iodine Elimination in Solution Nanomaterials ZIF-8 Cu<sup>0</sup> nanoparticles iodine adsorption DFT studies |
| title | Cu<sup>0</sup>-Functionalized, ZIF-8-Derived, Nitrogen-Doped Carbon Composites for Efficient Iodine Elimination in Solution |
| title_full | Cu<sup>0</sup>-Functionalized, ZIF-8-Derived, Nitrogen-Doped Carbon Composites for Efficient Iodine Elimination in Solution |
| title_fullStr | Cu<sup>0</sup>-Functionalized, ZIF-8-Derived, Nitrogen-Doped Carbon Composites for Efficient Iodine Elimination in Solution |
| title_full_unstemmed | Cu<sup>0</sup>-Functionalized, ZIF-8-Derived, Nitrogen-Doped Carbon Composites for Efficient Iodine Elimination in Solution |
| title_short | Cu<sup>0</sup>-Functionalized, ZIF-8-Derived, Nitrogen-Doped Carbon Composites for Efficient Iodine Elimination in Solution |
| title_sort | cu sup 0 sup functionalized zif 8 derived nitrogen doped carbon composites for efficient iodine elimination in solution |
| topic | ZIF-8 Cu<sup>0</sup> nanoparticles iodine adsorption DFT studies |
| url | https://www.mdpi.com/2079-4991/15/2/105 |
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