Enhanced microwave absorption properties of N-doped graphene@PANI nanorod arrays hierarchical structures modified by Fe3O4 nanoclusters

Reduced Graphene Oxide/Fe3O4/Polyaniline Ternary Composites as a Superior Microwave Absorber in the Shielding of Electromagnetic Pollution

“… 61 In the case of Fe 3 O 4 /PANI and RGO/Fe 3 O 4 /PANI, the additional peaks corresponding to the C=N (1571 cm –1 ), C=C of benzenoid and quinoid rings (1486 and 1300 cm –1 ) of PANI, C–N (1237 cm –1 ) and C–H stretching vibration (873 cm –1 ) also appeared. 47 These findings confirmed the successful incorporation of PANI. 62 However, the absence of peaks at S=O (1028 cm –1 ), C–S (828 cm –1 ), and C–H stretching of the alkyl chain (2960, 2920, and 2846 cm –1 ) in the spectra of RGO/Fe 3 O 4 and RGO/Fe 3 O 4 /PANI confirmed removal of SDBS.…”

“…In view of this, attenuation of EM waves have also been achieved in fabricating ternary composites derived from different permutation combination of conducting polymers, graphene, and Fe 3 O 4 , such as, graphene/Fe 3 O 4 incorporated polyaniline (PANI), 44 PANI nanorod/Fe 3 O 4 microspheres on graphene nanosheets, 45 graphene/polypyrrole (PPY)/Fe 3 O 4 , 46 N-doped graphene@PANI nanorod arrays hierarchical structures modified by Fe 3 O 4 nanoclusters, 47 and graphene/PPY/Fe 3 O 4. 48 In addition, RGO-based ternary composites comprising Fe 3 O 4 and PANI (or PPY) have also been studied in electromagnetic shielding interference applications, such as PANI-coated Fe 3 O 4 /reduced graphene, 49 RGO-magnetic porous nanospheres-PANI, 50 RGO/PPY nanotube/Fe 3 O 4 aerogel, 51 RGO-PANI-Co 3 O 4, 52 PPY-RGO-Co 3 O 4, 53 RGO/Fe 3 O 4 /PANI, 54 γ-Fe 2 O 3 /(SiO 2 ) x –SO 3 H/PPY core/shell/shell microspheres 55 for the application of electromagnetic interference shielding.…”

Achieving hierarchical hollow carbon@Fe@Fe3O4 nanospheres with superior microwave absorption properties and lightweight features

“…The wave numbers at 415 and 560 cm À1 belong to the stretching vibration of the Fe-O bond which is in agreement with previous literature studies. 26 Such a result implies the presence of iron oxide. Then, the XPS analysis of the representative sample S3 has been carried out to distinguish the chemical state of Fe.…”

Topological Defects in Metal‐Free Nanocarbon for Oxygen Electrocatalysis

“…[19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34] Additionally, some nitrogen-doped carbon materials have also shown considerable OER activities, but a limited durability. [35][36][37] The current theory behind the origin of electrocatalytic activity in heteroatom-doped carbon materials is based on the electroneutrality break and electron transfer induced by the heteroatom doping. Additionally, the surface functional groups, edge dangling bonds, and defective sites in nanocarbon materials also contribute to their electrocatalytic activity.…”