Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5435440 | Synthetic Metals | 2017 | 7 Pages |
The fabrication of sandwich graphene@NiO@PANI decorated with Ag particles was successfully carried out using multi-step method. A facile hydrothermal route (graphene@Ni(OH)2) was used in the first step, and calcination of precursor by tube furnace (graphene@NiO) in second step, followed using a situ polymerization (graphene@NiO@PANI), and finally formation of the quaternary composite (graphene@NiO@PANI@Ag) via reduction of AgNO3. The obtained samples were analyzed by kinds of instruments and the electromagnetic parameters demonstrated that the improving EM absorption property (â37.5Â dB) of graphene@NiO@PANI@Ag was ascribed to the better attenuation constant, impedance matching and enhanced interfacial effects. For graphene@NiO@PANI@Ag, the maximum reflection loss was up to â37.5Â dB at 13.4Â GHz, and bandwidth exceeding â10Â dB was 4.9Â GHz for a thickness of 3.5Â mm. Thus, the graphene@ NiO@PANI@Ag composite, with a high EM absorption performance and wide absorbing bandwidth, is a promising microwave absorbent.