Coconut shell-derived activated carbon and carbon nanotubes composite: a promising candidate for capacitive deionization electrode
| Autor: | Thi Thu Vu, Thanh Thien Co, Dai Lam Tran, Thi Nam Pham, Thai Hoang Nguyen, Thi Thu Trang Nguyen, Thi Diem Kieu Nguyen, Hiroshi Uyama, Le Thanh Nguyen Huynh, Thi Thom Nguyen, Trung H. Nguyen, Thai Hoang, Thanh Nhut Tran, Pham Anh Vu Ho, Thi Kieu Anh Vo, Viet Hai Le, Viet Mui Luong, Gia Vu Pham |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Capacitive deionization Composite number 02 engineering and technology Carbon nanotube 010402 general chemistry Electrochemistry 01 natural sciences Desalination law.invention Adsorption law Materials Chemistry medicine Mechanical Engineering Metals and Alloys 021001 nanoscience & nanotechnology Condensed Matter Physics 0104 chemical sciences Electronic Optical and Magnetic Materials Chemical engineering Mechanics of Materials Electrode 0210 nano-technology Activated carbon medicine.drug |
| Zdroj: | Synthetic Metals. 265:116415 |
| ISSN: | 0379-6779 |
| Popis: | Aiming at more efficient use of coconut resources to achieve multi-purpose goals, this work proposes an innovative composite for capacitive deionization (CDI) electrode in desalination applications when using coconut shell-derived activated Carbon (AC) as a matrix into which a certain amount of carbon nanotubes (CNTs) is incorporated. The electrochemical studies show that the optimized 9mAC:1CNTs electrode with a surface area of 630 m2/g has a specific capacitance of 90.2 F/g (at scan rate of 20 mV/s), salt adsorption capacity (SAC) of 14.1 mg/g at 1.0 V. SAC value is retained as high as 95.7% after 100 adsorption–desorption cycles at 1.0/0 V, showing a good cyclic stability of the electrode composites. Moreover, a calculated specific energy consumption (SEC) value of 0.312 kW h/m3 was quite low compared with other CDI electrodes reported in literature. Briefly, the present study indicates that AC-CNTs composite can serve as promising CDI electrode materials for desalination application. |
| Databáze: | OpenAIRE |
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