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Mechanism for the preparation of carbon spheres from potato starch treated by NH4Cl

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Abstract.
Carbon spheres (CSs) retaining the morphology of potato starch were prepared by a twostep
process: impregnation followed by carbonization. In this process, potato starch was
impregnated in NH4Cl solution for 1 h. The mechanism of preparation was proposed.
The presence of HCl catalyzes the dehydration of impregnated starch at lower temperature
than its melting point, which destroys the crystallites in original starch totally. This makes
the microcrystalline melting difficult during the following carbonization. Scanning electron
microscopy results show that small cavity exists in the center of sphere. The CSs shows
high graphitization degree after graphitizing by X-ray diffraction analysis.

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Informasi Detail

Judul Seri

C A R B ON

No. Panggil

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Penerbit

London : Elsevier Ltd.., 2008

Deskripsi Fisik

C A R B ON 4 7 ( 2 0 0 8 ) 3 1 3 –3 4 7

Bahasa

English

ISBN/ISSN

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Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

KIMIA

Info Detail Spesifik

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Pernyataan Tanggungjawab

agus

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