Salt template assisted synthesis of Fe@graphene for high-performance electromagnetic wave absorption. (31st October 2022)

• Record Type: Journal Article
• Authors: Hou, Xingwang; Wang, Wenjian; Gao, Xiaohong; Ran, Ke; Huang, Yilin; Zhang, Zidong; Fang, Yuan; Wang, Shuai; He, Dongxu; Ye, WeiPing; Zhao, Rui; Xue, Weidong
• Is Part Of: Carbon. Volume 199(2022)
• Page Start: 268
• Page End: 278
• Publication Date: 2022-10-31
• Subjects: Salt template assisted pyrolysis -- Iron phthalocyanine derived carbon -- Microwave absorption -- Impedance matching -- Finite element simulation; Carbon -- Periodicals; Carbone -- Périodiques; Koolstof; Toepassingen; Electronic journals; 546.681
• DOI: 10.1016/j.carbon.2022.07.072
• Languages: English
• ISSNs: 0008-6223

Abstract

Abstract: As the electromagnetic environment becomes increasingly deteriorated and complex, there is an increasing urgency for electromagnetic wave absorbing materials with thin, light, and wide strength characteristics. Graphene-based composites are considered candidates for the next generation of microwave absorbing materials. To realize the large-scale preparation of graphene-based materials, we utilize a modified salt template assisted pyrolysis method and innovatively chose iron phthalocyanine as the carbon source to prepare Fe@graphene. KCl cubic templates are prepared using an anti-solvent method, and iron phthalocyanine is pyrolyzed on the surface to form graphene and loaded with Fe particles in situ. The prepared Fe@graphene achieves extremely excellent electromagnetic wave absorption performance, with an effective absorption bandwidth of 7.9 GHz at a filling level of only 1 wt%. The effect of material dispersion and cubic structure is also investigated in this paper using finite element simulation. Graphical abstract: Image 1 Highlights: Preparation of phthalocyanine-derived carbon materials by salt-assisted pyrolysis. Synthesis of graphene with cubic structure by salt template method. Highly efficient electromagnetic wave absorption at low filling rate (1 wt%). The electromagnetic wave absorption mechanism is studied by numerical simulation.