Preparation and electromagnetic microwave adsorption performances of porous nanocomposite self-assembled by CoFe2 O4 nanoparticles and diatomite

IF 0.5 Q4 MATERIALS SCIENCE, COMPOSITES

Epitoanyag - Journal of Silicate Based and Composite Materials Pub Date : 2020-01-01 DOI:10.14382/epitoanyag-jsbcm.2020.20

Haodong Huang, M. He, O. Kotova, Y. Golubev, F. Dong, L. Gömze, E. Kurovics, Rui Lv, Shiyong Sun

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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.

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二氧化钛与硅藻土自组装多孔复合材料的制备及其电磁微波吸附性能

采用简单的柠檬酸-硝酸盐溶胶-凝胶自燃烧法，将CoFe2O4纳米颗粒与硅藻土组装成用于电磁微波吸附的CoFe2O4纳米复合材料。电镜结果表明，磁性CoFe2O4纳米粒子均匀分散在硅藻土表面和多孔结构中，形成稳定的CoFe2O4/硅藻土纳米复合材料。研究了硅藻土与CoFe2O4质量比不同时的磁性和介电性能。结果表明，CoFe2O4/硅藻土纳米复合材料具有较强的超顺磁性和电磁微波吸收性能，其最佳矫顽力为837.07 Oe，饱和磁化强度为96.5 emu/g，剩磁比(Mr/Ms)为0.52。当CoFe2O4与硅藻土的比例为1:10时，最大反射损耗为-12dB， <-10dB的频率范围为10Hz ~ 12Hz。结果表明，CoFe2O4/硅藻土复合材料可作为高效微波吸收材料，拓展了硅藻土基功能纳米材料的应用领域。

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来源期刊

Epitoanyag - Journal of Silicate Based and Composite Materials MATERIALS SCIENCE, COMPOSITES-

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审稿时长

12 weeks