Possible conduction mechanisms in coconut-shell activated carbon
This work reports on the result of electrical conductivity measurements carried out on coconut-shell activated carbon. The results suggest that the charge carriers moved by variable-range hopping below 200 K, by hopping among localized energy states between 200 K and 385 K, and by percolation throug...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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American Institute of Physics
1990
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| Online Access: | http://psasir.upm.edu.my/id/eprint/39903/ http://psasir.upm.edu.my/id/eprint/39903/1/21%20-%20Possible%20conduction%20mechanisms%20in%20coconut-shell%20activated%20carbon.pdf |
| _version_ | 1848849273842565120 |
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| author | W. Yusoff, W. Mohamad Daud Badri, M. Hashim, Mansor |
| author_facet | W. Yusoff, W. Mohamad Daud Badri, M. Hashim, Mansor |
| author_sort | W. Yusoff, W. Mohamad Daud |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | This work reports on the result of electrical conductivity measurements carried out on coconut-shell activated carbon. The results suggest that the charge carriers moved by variable-range hopping below 200 K, by hopping among localized energy states between 200 K and 385 K, and by percolation through energy states close to the mobility edge above 385 K. In the latter two conduction processes, significant additional frequency-dependent contributions to the conductivity were observed and are tentatively attributed to polarization of unremovable lignin and/or ionic impurities. These explanations are based on the present trends of the electrical transport theory for amorphous semiconductors. |
| first_indexed | 2025-11-15T09:47:47Z |
| format | Article |
| id | upm-39903 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T09:47:47Z |
| publishDate | 1990 |
| publisher | American Institute of Physics |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-399032015-09-23T01:11:24Z http://psasir.upm.edu.my/id/eprint/39903/ Possible conduction mechanisms in coconut-shell activated carbon W. Yusoff, W. Mohamad Daud Badri, M. Hashim, Mansor This work reports on the result of electrical conductivity measurements carried out on coconut-shell activated carbon. The results suggest that the charge carriers moved by variable-range hopping below 200 K, by hopping among localized energy states between 200 K and 385 K, and by percolation through energy states close to the mobility edge above 385 K. In the latter two conduction processes, significant additional frequency-dependent contributions to the conductivity were observed and are tentatively attributed to polarization of unremovable lignin and/or ionic impurities. These explanations are based on the present trends of the electrical transport theory for amorphous semiconductors. American Institute of Physics 1990-02 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/39903/1/21%20-%20Possible%20conduction%20mechanisms%20in%20coconut-shell%20activated%20carbon.pdf W. Yusoff, W. Mohamad Daud and Badri, M. and Hashim, Mansor (1990) Possible conduction mechanisms in coconut-shell activated carbon. Journal of Applied Physics, 67 (4). pp. 1915-1917. ISSN 0021-8979; ESSN: 1089-7550 |
| spellingShingle | W. Yusoff, W. Mohamad Daud Badri, M. Hashim, Mansor Possible conduction mechanisms in coconut-shell activated carbon |
| title | Possible conduction mechanisms in coconut-shell activated carbon |
| title_full | Possible conduction mechanisms in coconut-shell activated carbon |
| title_fullStr | Possible conduction mechanisms in coconut-shell activated carbon |
| title_full_unstemmed | Possible conduction mechanisms in coconut-shell activated carbon |
| title_short | Possible conduction mechanisms in coconut-shell activated carbon |
| title_sort | possible conduction mechanisms in coconut-shell activated carbon |
| url | http://psasir.upm.edu.my/id/eprint/39903/ http://psasir.upm.edu.my/id/eprint/39903/1/21%20-%20Possible%20conduction%20mechanisms%20in%20coconut-shell%20activated%20carbon.pdf |