Corrigendum to “Interfacial engineering to construct P-loaded hollow nanohybrids for flame-retardant and high-performance epoxy resins” [J. Colloid Interface Sci. 628(Part B) (2022) 851–863]

Synthesis of nitrogen-doped graphene aerogels modified by magnetic Fe3O4/Fe/C frameworks as excellent dual-band electromagnetic absorbers

“…The average grain size of a crystal is usually calculated using the Scherrer formula, which can be expressed as follows: 12,36…”

“…2(f), the Fe 2p fractal spectrum is fitted into two satellite peaks (732.3 eV and 718.6 eV), Fe 2p 3/2 (712.8 eV) and Fe 2p 1/2 (725.1 eV). 12 However, the absence of the characteristic peaks of metallic Fe indicates the occurrence of surface oxidation.…”

“…53 Secondly, the structural defects and oxygen-containing functional groups on the surface of NRGO can act as the polarization centers, resulting in the imbalance of dipole moment and the formation of dipole polarization under the alternating electromagnetic field, which further enhances the EMW dissipation capacity. 12,15,53 In addition, the doping of nitrogen atoms into the graphene lattice disrupts the complete sp 2 hybridization structure of carbon atoms, which causes many disordered sites. 15,53 Because of the different electronegativity between carbon and nitrogen atoms, lots of C-N electric dipoles can be formed, which is conductive to the dipole polarization and the dissipation of electromagnetic energy.…”

“…Thus, space charges may accumulate at the boundary of heterogeneous interfaces and form a capacitance-like structure, thus generating interfacial polarization loss and attenuating the power of the incident waves. 12,33,54 Fourthly, according to Cao's electron hopping model, 55 the conduction loss caused by electron migration and hopping in the 3D porous network structure of the composite aerogel can also help to attenuate the electromagnetic energy. 56 Finally, the natural resonance caused by the ferromagnetic component will further enhance the attenuation ability of the incident waves.…”

“…However, the impedance mismatch and single dissipation mechanism of RGO result in an unsatisfactory ability to absorb electromagnetic waves. 11,12 Compared with 2D RGO sheets, the three-dimensional (3D) RGO aerogel obtained by the self-assembly of adjacent RGO sheets has a unique porous network structure, which overcomes the disadvantages of high density, impedance mismatch and lamellar aggregation. [13][14][15] Thus, the RGO aerogel and its composites are considered to be promising lightweight EMW absorbers.…”