Large-scale synthesis, electromagnetic and enhanced microwave absorption properties of low helicity carbon nanotubes/Fe nanoparticles hybrid

2013 ◽  
Vol 107 ◽  
pp. 374-377 ◽  
Author(s):  
Xiaosi Qi ◽  
Wei Zhong ◽  
Chaoyong Deng ◽  
Chaktong Au ◽  
Youwei Du
Keyword(s):  
Carbon Nanotubes ◽  
Microwave Absorption ◽  
Large Scale ◽  
Absorption Properties ◽  
Microwave Absorption Properties ◽  
Fe Nanoparticles ◽  
Large Scale Synthesis

Enhanced microwave absorption properties of MnS2 microspheres interspersed with carbon nanotubes

2020 ◽  
Vol 502 ◽  
pp. 166432 ◽  
Author(s):  
Chao Liu ◽  
Bochong Wang ◽  
Congpu Mu ◽  
Kun Zhai ◽  
Fusheng Wen ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Microwave Absorption ◽  
Absorption Properties ◽  
Microwave Absorption Properties

Large-Scale Synthesis and Microwave Absorption Properties of CoFe2O4/ Co0.4Zn0.6Fe2O4 Hollow Nanospheres

2015 ◽  
Vol 645-646 ◽  
pp. 126-131
Author(s):  
Qing Guo Ren ◽  
Xiao Jing Qiao ◽  
Yan Li ◽  
Zhi Gang Sun ◽  
Xiao Dang Guo ◽  
...  
Keyword(s):  
Microwave Absorption ◽  
Reflection Loss ◽  
Large Scale ◽  
Average Diameter ◽  
Hollow Nanospheres ◽  
Magnetic Studies ◽  
Absorption Properties ◽  
Microwave Absorption Properties ◽  
Line Theory ◽  
Glycol Solution

Monodisperse CoFe2O4and Co0.4Zn0.6Fe2O4hollow nanospheres were synthesized in large scale by solvothermal method in ethylene glycol solution. The structure, shape and size of the samples were investigated by Fourier Transform infrared, X-ray powder diffraction and scanning electron microscopy. The results indicate that the products are spherical with an average diameter less than 200 nm. Magnetic studies revealed that the saturation magnetization of Co0.4Zn0.6Fe2O4is 78.6 emu/g, higher than the CoFe2O4, which is 69 emu/g, while the coercivity of the Co0.4Zn0.6Fe2O4is 184 Oe , obviously lower than that of CoFe2O4which is 832 Oe. The electromagnetic parameters were measured at 2-18 GHz using HP8722ES vector network analyzer and then the microwave absorption properties were calculated through the transmission line theory. As to the Co0.4Zn0.6Fe2O4, the absorption bandwidth with reflection loss below-10 dB is up to 3GHz, from 10GHz to 13GHz with a thickness of 2 mm. A maximum reflection loss-45.6 dB was found at 12.9 GHz for the CoFe2O4with a thickness of 1.8 mm. As a result, the as-prepared hollow nanospheres show good prospects of being applied in EM wave absorption materials.

scholarly journals Preparation and Microwave Absorption Properties of CNTs/Fe3O4 Composite for Hyperthermia Applications

2011 ◽  
Vol 20 (3) ◽  
pp. 096369351102000
Author(s):  
Liu Aihong
Keyword(s):  
Carbon Nanotubes ◽  
Electromagnetic Wave ◽  
Microwave Absorption ◽  
Hydrothermal Treatment ◽  
Treatment Method ◽  
Absorption Properties ◽  
Microwave Absorption Properties ◽  
Electromagnetic Wave Absorption ◽  
Wave Absorption ◽  
Tumor Hyperthermia

In this letter, the surface of carbon nanoutubes was successfully decorated by Fe3O4 via a simple and effective coprecipitation and hydrothermal treatment method. Then the resultant composite were characterized. The results showed that Fe3O4 nanoparticles in the surface of carbon nanotubes were uniform and universal; The composite was ferromagnetic and also had better absorbing properties in the 0-5GHz range. CNTs/Fe3O4 composite had significant potential for electromagnetic wave absorption application in tumor hyperthermia.

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