Decorating untreated carbon nanotubes with Fe3O4@SiO2 nanoparticles and its microwave absorption property

MWCNT/CuO/Fe3O4/Polyaniline Nanocomposites with Remarkable Microwave Attenuation and Broad Frequency Band by Tuned Composition

“…2, the scattering peaks are around 2 = 30.3°, 35.6°, 43.4°, 53.5°, 57.3° and 62.7°, are related to the Bragg plates (220), (311), (400), ( 422), ( 511) and (440), respectively, which are completely consistent with the diffraction patterns of magnetite (Fe 3 O 4 ), according to the JCPDS Card 19-0629, this pattern is related to the face center cubic structure (FCC) of Fe 3 O 4 , no additional peaks are observed to indicate the presence of impurities [25]. The peak of the carbon nanotube was observed at an angle of 2 =25.9° corresponding to the (002) of graphite's hexagonal structure [25]. The peak 2 =39.4° belongs to the (200), (111) planes and the peak at 2 =32.5° relates to (110) plane which indexed to the monoclinic structure of CuO (JCPDS Card 48-1548) [26,27].…”

Dielectric response and electromagnetic wave absorption of novel macroporous short carbon fibers/mullite composites

“…Hence, EM wave absorption of C f /Mu composites will be improved by an enhanced tan δ. Debye dipolar relaxation also plays an important role in dielectric loss of EM wave absorption materials, which can be expressed by a Cole-Cole semicircle. 59 Combining Equations (3) and (4), the relationship between ε′ and ε″ can be deduced as follows 35 :…”

“…Nowadays, electromagnetic (EM) interference and radiation pollution generated from widespread application of electronic devices, could damage the normal function of electronic equipment as well as humanity 1‐4 . Consequently, high‐performance EM wave absorbing materials which have drawn increasing attention are now regarded as an effective strategy to eliminate the EM pollution.…”

Tuned MWCNT/CuO/Fe3O4/Polyaniline nanocomposites with exceptional microwave attenuation and a broad frequency band

“…2 , the scattering peaks around 2θ = 30.3°, 35.6°, 43.4°, 53.5°, 57.3°, and 62.7° correspond to the Bragg plates (220), (311), (400), (422), (511), and (440), respectively, and are entirely consistent with the diffraction patterns of magnetite (Fe 3 O 4 ). According to JCPDS Card 19–0629, this pattern corresponds to the face center cubic structure (FCC) of Fe 3 O 4 , and no additional peaks are observed to indicate the presence of impurities 27 . The peak of the carbon nanotube was observed at an angle of 25.9°, corresponding to the (002) of graphite’s hexagonal structure 26 .…”