Observation of activated carbon fibres with SEM and AFM correlation with adsorption data in aqueous solution

Activated carbon fibres are new adsorbents, which seem very promising for air or water treatment. In this work, rayon fibres which have been carbonized and activated in the form of woven cloths, are studied by means of two kinds of microscopy: Scanning Electron Microscopy (SEM) and Atomic Force Micr...

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Bibliographic Details
Published in:Carbon (New York) 2000, Vol.38 (3), p.407-422
Main Authors: Brasquet, C., Rousseau, B., Estrade-Szwarckopf, H., Le Cloirec, P.
Format: Article
Language:English
Subjects:
A. Activated carbon
Adsorbents
Adsorption
C. Electron microscopy
Carbon fibers
Chemical Sciences
Chemistry
D. Porosity
Exact sciences and technology
General and physical chemistry
Surface physical chemistry
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Summary:Activated carbon fibres are new adsorbents, which seem very promising for air or water treatment. In this work, rayon fibres which have been carbonized and activated in the form of woven cloths, are studied by means of two kinds of microscopy: Scanning Electron Microscopy (SEM) and Atomic Force Microscopy (AFM). The resulting observations show the effect of carbonization and activation on the fibre surface structure. The influence of activation conditions (oxidation gas, temperature and duration) is studied and confirmed by N 2 adsorption. The specific porosity properties of fibres are then used to adsorb different organic compounds in aqueous solutions, with low molecular weights (aromatics like phenol) and high molecular weights (humic substances). A good correlation is found between these adsorption data and the microscopic observations.
ISSN:0008-6223
1873-3891
DOI:10.1016/S0008-6223(99)00120-7