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Start Over Author "Chao-Qin Li" Journal frontiers in chemistry
2 results on '"Chao-Qin Li"'

1. Tunable High-Performance Microwave Absorption and Shielding by Three Constituent Phases Between rGO and Fe3O4@SiO2 Nanochains

Author

Chao-Qin Li, Wei Xu, Ruo-Cheng Ding, Xun Shen, Zhi Chen, Mao-Dong Li, and Guang-Sheng Wang

Subjects
Fe3O4@SiO2 nanochains, rGO/Fe3O4@SiO2 composite, microwave absorption, electromagnetic shielding, multi-functional composite, Chemistry, QD1-999
Abstract

With the aim of achieving high microwave absorption and electromagnetic shielding performance, reduced graphene oxide (rGO) and Fe3O4@SiO2 nanochains are successfully combined at various mass ratios. By selecting the right mass ratio, an rGO/Fe3O4@SiO2 composite with excellent microwave absorption properties is obtained, and, due to the addition of highly conductive rGO, the desired shielding effectiveness is also achieved. The reflection loss (RL) value of the composite can reach −48.34 dB with a mass ratio of 1:1, and the effective bandwidth (

Published
2019
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2. Tunable High-Performance Microwave Absorption and Shielding by Three Constituent Phases Between rGO and Fe3O4@SiO2 Nanochains

Author

Guang-Sheng Wang, Zhi Chen, Xun Shen, Mao-Dong Li, Wei Xu, Ruo-Cheng Ding, and Chao-Qin Li

Subjects
Permittivity, Materials science, Composite number, rGO/Fe3O4@SiO2 composite, Oxide, 02 engineering and technology, 010402 general chemistry, 01 natural sciences, law.invention, lcsh:Chemistry, chemistry.chemical_compound, electromagnetic shielding, law, multi-functional composite, Electrical conductor, Original Research, Fe3O4@SiO2 nanochains, microwave absorption, Graphene, business.industry, Reflection loss, General Chemistry, 021001 nanoscience & nanotechnology, 0104 chemical sciences, Chemistry, lcsh:QD1-999, chemistry, Electromagnetic shielding, Optoelectronics, 0210 nano-technology, business, Microwave
Abstract

In order to tune the microwave absorption together with the electromagnetic shielding performance, reduced graphene oxide (rGO) and Fe3O4@SiO2 nanochains are successfully combined with various mass ratio. By properly adjusting the permittivity and permeability derived from different contents of the rGO and Fe3O4@SiO2 nanochains, the rGO/Fe3O4@SiO2 composite with excellent microwave absorption properties is obtained. And due to adding the highly conductive rGO, the desired shielding effectiveness is also achieved. The reflection loss value of -48.34 dB is achieved for the composite with mass ratio of 1:1, and the bandwidth less than -10 dB can reach up to 4.88 GHz with a thickness of 2.0 mm. Moreover, the composite with mass ratio of 4:1 exhibits superior electromagnetic shielding performance as high as 37 dB, which also broaden its application fields. Considering the outstanding microwave absorption and electromagnetic shielding performance, the composite can be employed as a potential multi-functional material.

Published
2019

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