Cellulose-derived carbon aerogels supported goethite (α-FeOOH) nanoneedles and nanoflowers for electromagnetic interference shielding.
Carbohydr Polym
; 156: 427-434, 2017 Jan 20.
Article
em En
| MEDLINE
| ID: mdl-27842842
ABSTRACT
We describe a rapid and facile chemical precipitation method to grow goethite (α-FeOOH) nanoneedles and nanoflowers on the carbon aerogels which was obtained from the pyrolysis of cellulose aerogels. When evaluated as electromagnetic interference (EMI) shielding materials, the α-FeOOH/cellulose-derived carbon aerogels composite displays the highest SEtotal value of 34.0dB at the Fe3+/Fe2+ concentration of 0.01M, which is about 4.8 times higher than that of the individual α-FeOOH (5.9dB). When the higher or lower Fe3+/Fe2+ concentrations were used, the EMI shielding performance deterioration occurred. The integration of α-FeOOH with the carbon aerogels transforms the reflection-dominant mechanism for α-FeOOH into the adsorption-dominant mechanism for the composite. The adsorption-dominant mechanism undoubtedly makes contribution to alleviating secondary radiation, which is regarded as more attractive alternative for developing electromagnetic radiation protection products.
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01-internacional
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MEDLINE
Assunto principal:
Protetores contra Radiação
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Carbono
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Celulose
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Compostos de Ferro
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Fenômenos Eletromagnéticos
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Géis
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Minerais
Idioma:
En
Revista:
Carbohydr Polym
Ano de publicação:
2017
Tipo de documento:
Article