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2 results on '"Shumin Du"'

1. Preparation of RGO/Fe3O4 Nanocomposites as a Microwave Absorbing Material

Author

Xingtian Chen, Shumin Du, Ruoyu Hong, and Huaiyin Chen

Subjects
reduced graphene oxide, ferroferric oxide, co-precipitation, hydrophobicity, electromagnetic properties, Inorganic chemistry, QD146-197
Abstract

The hydrophobic nanocomposites of reduced graphene oxide (RGO) and Fe3O4 (RGO/Fe3O4) were prepared by a one-pot process through co-precipitation under alkaline conditions. The microwave absorption performance of the RGO/Fe3O4 nanocomposites was analyzed according to their electromagnetic parameters. The results showed that the RGO/Fe3O4 nanocomposites displayed better absorbing performance than the pristine Fe3O4 nanoparticles, owing to the synergistic effect of Fe3O4 and RGO. The maximum reflection loss (RL) of the RGO/Fe3O4 nanocomposites with a thickness of 2 mm reached −45.7 dB at 13.3 GHz, and the bandwidth (RL < −10 dB) ranged from 11.5 to 16.5 GHz. However, the maximum RL of the Fe3O4 nanoparticles with a thickness of 5 mm only reached −5.3 dB at 5.7 GHz. The RGO/Fe3O4 nanocomposites have a great potential application in high-performance electromagnetic microwave absorbing.

Published
2023
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2. Preparation and electromagnetic properties characterization of reduced graphene oxide/strontium hexaferrite nanocomposites

Author

Shumin Du, Huaiyin Chen, and Ruoyu Hong

Subjects
Technology, Materials science, Physical and theoretical chemistry, QD450-801, electromagnetic properties, Oxide, Energy Engineering and Power Technology, Medicine (miscellaneous), chemistry.chemical_element, TP1-1185, 02 engineering and technology, 010402 general chemistry, reduced graphene oxide, 01 natural sciences, law.invention, Nanomaterials, Biomaterials, chemistry.chemical_compound, Magazine, law, Strontium, Nanocomposite, Graphene, Chemical technology, Process Chemistry and Technology, 021001 nanoscience & nanotechnology, 0104 chemical sciences, Surfaces, Coatings and Films, Characterization (materials science), strontium hexaferrite, chemistry, Chemical engineering, 0210 nano-technology, Science, technology and society, Biotechnology
Abstract

With the rapid development of electronics and information technology, electronics and electrical equipment have been widely used in our daily lives. The living environment is full of electromagnetic waves of various frequencies and energy. Electromagnetic wave radiation has evolved into a new type of environmental pollution that has been listed by the WHO (World Health Organization) as the fourth largest source of environmental pollution after water, atmosphere, and noise. Studies have shown that when electromagnetic wave radiation is too much, it can cause neurological disorders. And electromagnetic interference will cause the abnormal operation of medical equipment, precision instruments and other equipment, and therefore cause incalculable consequences. Therefore, electromagnetic protection has become a hot issue of concern to the social and scientific circles.

Published
2020
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