Boron-nitride-carbon nanosheets with different pore structure and surface properties for capacitive deionization
| Autor: | Shiyong Wang, Jieshan Qiu, Gang Wang, Jianren Wang, Yunqi Zhang |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Capacitive deionization chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Anode Biomaterials chemistry.chemical_compound Colloid and Surface Chemistry Adsorption chemistry Chemical engineering Boron nitride Specific surface area medicine Surface charge 0210 nano-technology Carbon Activated carbon medicine.drug |
| Zdroj: | Journal of Colloid and Interface Science. 552:604-612 |
| ISSN: | 0021-9797 |
| DOI: | 10.1016/j.jcis.2019.05.094 |
| Popis: | Capacitive deionization (CDI) has long been identified as a hopeful solution for adsorption of ions from saline water. Developing stable electrode materials is of great significance to the improvement of CDI performance. In this work, two kinds of boron-nitride-carbon (BCN and MBCN) materials were synthesized for capacitive deionization (CDI) application. The BCN featured with high specific surface area (1097.5 m2 g−1) and positive surface charges (Epzc of −0.445 V vs. Ag/AgCl) is a good anodic candidate in the CDI device. After configuring with activated carbon, the asymmetric CDI cell exhibits excellent salt adsorption capacity of 17.46 mg g−1 at supplied voltage of 1.4 V when the feeding NaCl concentration is 300 mg L−1 and robust cycle performance with 81.4% capacity retention after 50 cycles at supplied voltage of 1.0 V with initial salt concentration of 500 mg L−1. Overall, in contrast to that of MBCN and carbon materials, the BCN nanosheets demonstrate a high removal capacity and superior cycling stability even at low salt concentration. The stable and positively charged BCN should be a good choice for next generation of high performance CDI electrode materials. |
| Databáze: | OpenAIRE |
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