1. Preparation and electromagnetic microwave adsorption performances of porous nanocomposite self-assembled by CoFe2O4 nanoparticles and diatomite.
- Author
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HUANG, Haodong, HE, Meng, KOTOVA, Olga B., DONG, Faqin, GÖMZE, László A., KUROVICS, Emese, LV, Rui, and SUN, Shiyong
- Subjects
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NANOPARTICLES , *MICROWAVE materials , *DIATOMACEOUS earth , *MICROWAVES , *NANOCOMPOSITE materials , *METHYLENE blue - Abstract
The efficient nanocomposite of CoFe2O4 diatomite for electromagnetic microwave adsorption was assembled by CoFe2O4 nanoparticles (NPs) and diatomite via a simple citric acid-nitrate sol-gel auto-combustion method. The electronic microscopy results show that the magnetic CoFe2O4 NPs are uniformly dispersed in the surface and porous structure of diatomite to form stable CoFe2O4/diatomite nanocomposite. The magnetic and dielectric properties with various mass ratios of CoFe2O4 to diatomite was investigated. It was showed that nanocomposite of CoFe2O4/ diatomite has strong superparamagnetic and electromagnetic microwave absorbing properties with optimized conditions of coercive force of 837.07 Oe, the saturation magnetization of 96.5 emu/g, and the remanence ratio (Mr/Ms) of 0.52, respectively. The maximum reflection loss is -12dB, and <-10dB frequency ranges from 10Hz to 12Hz when the ratio of CoFe2O4 to Diatomite is 1:10. The results indicate that CoFe2O4/diatomite composites can be used as the highly efficient microwave absorption materials, which expanded the application field of diatomite-based functional nanomaterials. [ABSTRACT FROM AUTHOR]
- Published
- 2020
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