PROPERTIES OF COCONUT SHELL ACTIVATED CARBON

Microwave-induced potassium hydroxide activation was used to produce coconut shell-based activated carbon. Surface area, pore size and specific capacitance value of the carbon produced were analysed to investigate its potential as an electrode material for supercapacitor. The activation process was...

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Veröffentlicht in:Journal of tropical forest science 2013-10, Vol.25 (4), p.497-503
Hauptverfasser: Iqbaldin, MN Mohd, Khudzir, I, Azlan, MI Mohd, Zaidi, AG, Surani, B, Zubri, Z
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Sprache:eng
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Zusammenfassung:Microwave-induced potassium hydroxide activation was used to produce coconut shell-based activated carbon. Surface area, pore size and specific capacitance value of the carbon produced were analysed to investigate its potential as an electrode material for supercapacitor. The activation process was carried out at 600 W with various irradiation times (10 to 30 min). The activated carbon produced had high surface area ranging from 1244.0—1768.8 m2 g-1 compared with the inactivated carbon, 36.5 m2 g-1. These results were in good agreement with scanning electron micrographs revealing highly porous surface structure. In addition, the specific capacitance value of the material increased from 94.8 to 156.3 F g-1 compared with the inactivated biomass, 6.4 F g-1. The material produced was found to be suitable as an electrode for supercapacitor. Gelombang mikro digunakan untuk menghasilkan karbon teraktif tempurung kelapa dengan kalium hidroksida sebagai agen pengaktif. Luas permukaan, saiz liang dan nilai kapasiti spesifik karbon yang dihasilkan dianalisis untuk mengkaji potensinya sebagai elektrod kapasitor lampau. Proses pengaktifan dijalankan pada 600 W dengan masa radiasi yang berbeza (10 min hingga 30 min). Karbon teraktif yang dihasilkan mempunyai luas permukaan yang tinggi iaitu antara 1244.0 m2 g-1 dengan 1768.8 m2 g-1 berbanding dengan karbon tak teraktif iaitu 36.5 m2 g-1. Keputusan ini berpadanan dengan keputusan mikrograf imbasan elektron yang menunjukkan struktur permukaan yang poros. Tambahan lagi, nilai kapasiti spesifik bahan teraktif juga meningkat daripada 94.8 F g-1 menjadi 156.3 F g-1 berbanding dengan karbon tak teraktif iaitu 6.4 F g-1. Karbon teraktif yang dihasilkan didapati sesuai sebagai elektrod kapasitor lampau.
ISSN:0128-1283