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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...

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Main Authors: W. Yusoff, W. Mohamad Daud, Badri, M., Hashim, Mansor
Format: Article
Language:English
Published: American Institute of Physics 1990
Online Access:http://psasir.upm.edu.my/id/eprint/39903/1/21%20-%20Possible%20conduction%20mechanisms%20in%20coconut-shell%20activated%20carbon.pdf
http://psasir.upm.edu.my/id/eprint/39903/
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spelling my.upm.eprints.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
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
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.
format Article
author W. Yusoff, W. Mohamad Daud
Badri, M.
Hashim, Mansor
spellingShingle W. Yusoff, W. Mohamad Daud
Badri, M.
Hashim, Mansor
Possible conduction mechanisms in coconut-shell activated carbon
author_facet W. Yusoff, W. Mohamad Daud
Badri, M.
Hashim, Mansor
author_sort W. Yusoff, W. Mohamad Daud
title Possible conduction mechanisms in coconut-shell activated carbon
title_short 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_sort possible conduction mechanisms in coconut-shell activated carbon
publisher American Institute of Physics
publishDate 1990
url http://psasir.upm.edu.my/id/eprint/39903/1/21%20-%20Possible%20conduction%20mechanisms%20in%20coconut-shell%20activated%20carbon.pdf
http://psasir.upm.edu.my/id/eprint/39903/
_version_ 1643832558867185664
score 13.211869

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