skip to main content

SciTech ConnectSciTech Connect

Title: A new method for the preparation of a Fe{sub 3}O{sub 4}/graphene hybrid material and its applications in electromagnetic wave absorption

Graphical abstract: A microwave-assisted solvothermal process was used to prepare Fe{sub 3}O{sub 4} nanoparticles/graphene hybrids, which could be applied as an electromagnetic (EM) radiation absorbent. The absorber, composed of 20 wt% Fe{sub 3}O{sub 4}/graphene–epoxy, exhibited a dual-frequency reflection characteristic covering the C and Ku bands with maximum reflection losses of less than −20 dB at thicknesses of 4 and 5 mm. - Highlights: • Fe{sub 3}O{sub 4}/graphene composites were prepared by a microwave-assisted solvothermal route. • Uniform loading of Fe{sub 3}O{sub 4} nanoparticles on graphene was obtained. • The products as-synthesized show great promise as a microwave absorption material. • Synergistic effects of Fe{sub 3}O{sub 4} and graphene caused improved absorption efficiency. • The Fe{sub 3}O{sub 4}/graphene product possessed a dual-frequency reflection characteristic. - Abstract: A rapid, simple, and inexpensive process combining a microwave-assisted technique and a solvothermal method has been developed using graphene sheets and FeCl{sub 3}·6H{sub 2}O as the reactant to prepare graphene/Fe{sub 3}O{sub 4} nanoparticle hybrids, which can be applied as an electromagnetic radiation absorbent. The experimental factors (i.e., composition ratio, microwave power, and irradiation time) on the products’ characteristics were examined. Under optimal conditions, the morphological analysis revealed that the graphene sheet was homogeneously covered withmore » Fe{sub 3}O{sub 4} nanoparticles (∼50 nm). The electromagnetic parameters of the composites made from 20 wt% Fe{sub 3}O{sub 4}/graphene–epoxy were measured by a vector network analyzer. It was found that the 4- and 5 mm-thick composites could attain a reflection loss below −20 dB in the dual-ranges of 4–8 and 12–18 GHz.« less
Authors:
 [1] ;  [2] ;  [3] ;  [2] ;  [4]
  1. School of Defense Science, Chung Cheng Institute of Technology, National Defense University, Daxi, Taoyuan 335, Taiwan, ROC (China)
  2. Department of Chemical and Materials Engineering, Chung Cheng Institute of Technology, National Defense University, Daxi, Taoyuan 335, Taiwan, ROC (China)
  3. Department of Chemical and Materials Engineering, MingHsin University of Science and Technology, Hsinfeng, Hsinchu 304, Taiwan, ROC (China)
  4. Weapon System Center, Chung Cheng Institute of Technology, National Defense University, Daxi, Taoyuan 335, Taiwan, ROC (China)
Publication Date:
OSTI Identifier:
22475934
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Research Bulletin; Journal Volume: 70; Other Information: Copyright (c) 2015 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; ABSORBENTS; ABSORPTION; DIELECTRIC PROPERTIES; EFFICIENCY; EPOXIDES; GRAPHENE; IRON CHLORIDES; IRON OXIDES; IRRADIATION; MAGNETIC PROPERTIES; MICROWAVE RADIATION; NANOCOMPOSITES; NANOPARTICLES; REFLECTION; THICKNESS