Nitrogen-Doped Core-Shell Mesoporous Carbonaceous Nanospheres for Effective Removal of Fluorine in Capacitive Deionization
| العنوان: | Nitrogen-Doped Core-Shell Mesoporous Carbonaceous Nanospheres for Effective Removal of Fluorine in Capacitive Deionization |
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| المؤلفون: | Zhao, Yubo, Li, Kexun, Sheng, Bangsong, Chen, Feiyong, Song, Yang |
| المصدر: | Water Volume 15 Issue 3 Pages: 608 |
| بيانات النشر: | MDPI AG, 2023. |
| سنة النشر: | 2023 |
| مصطلحات موضوعية: | fluorine removal, mesoporous carbon, capacitive deionization, Geography, Planning and Development, nitrogen doping, Aquatic Science, Biochemistry, Water Science and Technology |
| الوصف: | Fluorine pollution of wastewater is a global environmental problem. Capacitive deionization has unique advantages in the defluorination of fluorine-containing wastewater; however, the low electrosorption capacity significantly restricts its further development. To overcome this limitation, nitrogen-doped core-shell mesoporous carbonaceous nanospheres (NMCS) were developed in this study based on structural optimization and polarity enhancement engineering. The maximal electrosorption capacity of NMCS for fluorine reached 13.34 mg g−1, which was 24% higher than that of the undoped counterpart. NMCS also indicated excellent repeatability evidenced by little decrease of electrosorption capacity after 10 adsorption-regeneration cycles. According to material and electrochemical measurements, the doping of nitrogen into NMCS resulted in the improvement of physicochemical properties such as conductivity and wettability, the amelioration of pore structure and the transformation of morphology from yolk-shell to core-shell structure. It not only facilitated ion transportation but also improved the available adsorption sites, and thus led to enhancement of the defluorination performance of NMCS. The above results demonstrated that NMCS would be an excellent electrode material for high-capacity defluorination in CDI systems. |
| وصف الملف: | application/pdf |
| تدمد: | 2073-4441 |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9d236753dc7584eb8ab2c965a1a212e5Test https://doi.org/10.3390/w15030608Test |
| حقوق: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....9d236753dc7584eb8ab2c965a1a212e5 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 20734441 |
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