Core@shell@shell structured carbon-based magnetic ternary nanohybrids: Synthesis and their enhanced microwave absorption properties

• Published in: Applied surface science 2018-05, Vol.441, p.780-790
• Main Authors: Yang, Erqi, Qi, Xiaosi, Xie, Ren, Bai, Zhongchen, Jiang, Yang, Qin, Shuijie, Zhong, Wei, Du, Youwei
• Format: Article
• Language: English
• Subjects: Chemical vapor deposition; CNTs ternary nanohybrids; Core; Fe3C; Microwave absorption properties; Shell; Shell structures
• ISSN: 0169-4332; 1873-5584
• DOI: 10.1016/j.apsusc.2018.02.029

Schematic illustration for the synthesis process of core@shell@shell structured carbon-based magnetic ternary nanohybrids and their microwave absorption properties. [Display omitted] •Core@shell@shell structured carbon-based magnetic ternary hybrids have been produced.•Different kinds of ternary nanohybrids could be selectively produced in high yield.•The ternary nanohybrids exhibited remarkably excellent microwave absorption property.•EM wave microwave absorbing mechanism was discussed in details. High encapsulation efficiency of core@shell@shell structured carbon-based magnetic ternary nanohybrids have been synthesized in high yield by chemical vapor deposition of acetylene directly over octahedral-shaped Fe2O3 nanoparticles. By controlling the pyrolysis temperature, Fe3O4@Fe3C@carbon nanotubes (CNTs) and Fe@Fe3C@CNTs ternary nanohybrids could be selectively produced. The optimal RL values for the as-prepared ternary nanohybrids could reach up to ca. −46.7, −52.7 and −29.5 dB, respectively. The excellent microwave absorption properties of the obtaiend ternary nanohybrids were proved to ascribe to the quarter-wavelength matching model. Moreover, the as-prepared Fe@Fe3C@CNTs ternary nanohybrids displayed remarkably enhanced EM wave absorption capabilities compared to Fe3O4@Fe3C@CNTs due to their excellent dielectric loss abilities, good complementarities between the dielectric loss and the magnetic loss, and high attenuation constant. Generally, this strategy can be extended to explore other categories of core@shell or core@shell@shell structured carbon-based nanohybrids, which is very beneficial to accelerate the advancements of high performance MAMs.