Zeolite–carbon composites prepared from industrial wastes: (II) evaluation of the adaptability as environmental materials

Novel zeolite–carbon composites were fabricated by a combined process of calcination and carbonization at 600–850 °C in the N 2 atmosphere followed by a hydrothermal treatment from industrial wastes of coal fly ash and sawdust mixtures in alkaline aqueous solutions. Adaptability of the resulting zeo...

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Published inMaterials science & engineering. A, Structural materials : properties, microstructure and processing Vol. 404; no. 1; pp. 274 - 280
Main Authors Gao, N.F., Kume, S., Watari, K.
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier B.V 15.09.2005
Elsevier
Subjects
Carbon
Cross-disciplinary physics: materials science; rheology
Electromagnetic wave absorption
Exact sciences and technology
Materials science
Other materials
Physics
Specific materials
Specific surface area
Waste
Water vapor adsorption
Zeolite
Specific surface area
Electromagnetic wave absorption
Zeolite
Carbon
Waste
Water vapor adsorption
Calcination
Electromagnetic shielding
Zeolites
Composite materials
Synthesis
Hydrothermal treatment
Adsorption
Industrial wastes
Aqueous solutions
Steam
Porosity
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Summary:Novel zeolite–carbon composites were fabricated by a combined process of calcination and carbonization at 600–850 °C in the N 2 atmosphere followed by a hydrothermal treatment from industrial wastes of coal fly ash and sawdust mixtures in alkaline aqueous solutions. Adaptability of the resulting zeolite–carbon composites as high value-added environmental materials was evaluated. It was found that the composites consisted of micropores and mesopores with the ability to adsorb water vapor up to an amount of 20 mass% which was superior to some commercial zeolite building materials. The composites also demonstrated a capacity to absorb electromagnetic wave in the W-band frequency range (75–110 GHz) characterized as a reflection loss higher than 20 dB at the resonant frequencies. These results indicated that the zeolite–carbon composites were prominent candidates as environmental-friendly building materials for wall or flooring with adsorption abilities for water vapor as well as absorption and shielding effects of electromagnetic wave.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0921-5093
1873-4936
DOI:10.1016/j.msea.2005.05.090