title: Cellulose-derived carbon aerogels supported goethite (α-FeOOH) nanoneedles and nanoflowers for electromagnetic interference shielding.
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 SEtotalvalue 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.
authors.affiliation: Material Science and Engineering College, Northeast Forestry University, Harbin 150040, China. Electronic address: wancaichaojy@163.com.
authors.forename: Caichao
authors.initials: C
authors.lastname: Wan
authors.affiliation: Material Science and Engineering College, Northeast Forestry University, Harbin 150040, China. Electronic address: yjiao123@126.com.
authors.forename: Yue
authors.initials: Y
authors.lastname: Jiao
authors.affiliation: Material Science and Engineering College, Northeast Forestry University, Harbin 150040, China. Electronic address: neduxgb@126.com.
authors.forename: Tiangang
authors.initials: T
authors.lastname: Qiang
authors.affiliation: Material Science and Engineering College, Northeast Forestry University, Harbin 150040, China. Electronic address: lijiangroup@163.com.
authors.forename: Jian
authors.initials: J
authors.lastname: Li
mesh_terms: D002244:Carbon / Q000737:chemistry*; D002482:Cellulose / Q000737:chemistry*; D055590:Electromagnetic Phenomena; D005782:Gels / Q000737:chemistry*; D058085:Iron Compounds / Q000737:chemistry*; D008903:Minerals / Q000737:chemistry*; D011837:Radiation-Protective Agents / Q000737:chemistry*
chemical_list: D005782:Gels; D058085:Iron Compounds; D008903:Minerals; D011837:Radiation-Protective Agents; C094886:goethite; D002244:Carbon; D002482:Cellulose
keywords: Carbon aerogels; Cellulose; Composites; Electromagnetic interference shielding; Goethite