Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5157504 | Carbohydrate Polymers | 2017 | 26 Pages |
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 34.0 dB at the Fe3+/Fe2+ concentration of 0.01 M, which is about 4.8 times higher than that of the individual α-FeOOH (5.9 dB). 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.
Related Topics
Physical Sciences and Engineering
Chemistry
Organic Chemistry
Authors
Caichao Wan, Yue Jiao, Tiangang Qiang, Jian Li,