Abstract
Lotus roots-like NiO/NiCo2O4 hybrids derived from Metal-organic frameworks (MOFs) are fabricated for the first time by using flake NiCo-MOF precursors as reactant templates. It was found that a thin sample consisting of 60 wt % NiO/NiCo2O4 hybrids in the wax matrix exhibited an effective microwave absorption bandwidth of 4.2 GHz at the thickness of 1.6 mm. The highest reflection loss of −47 dB was observed at 13.4 GHz for a sample with a thickness of 1.7 mm. Results obtained in this study indicate that hybrids of NiO and NiCo2O4 are promising microwave absorbing materials with adjustable permittivity, which can exhibit broad effective absorption bandwidth at low filler loading and thin thickness.
Highlights
In the past years, the research on microwave absorbing materials has focused on low-dimensional nanomaterials
Porous NiO/NiCo2O4 lotus root-like nanoflakes derived from NiCo-metal-organic frameworks (MOFs) are fabricated via directly carbonizing the flake structured NiCo-MOFs precursor under high temperature
Flakes structured NiCo-MOFs are firstly synthesized via a hydrothermal method using Co(acac)[2], Ni(NO3)2·6H2O, and H2BDC as precursors
Summary
The research on microwave absorbing materials has focused on low-dimensional nanomaterials. Recent progress demonstrated that the morphology of nanomaterials has profound effects on their microwave absorption performance by changing their electromagnetic parameters in microwave range[1,2,3]. It is of great significance to survey the morphology dependent microwave absorption properties of nanomaterials towards the design and fabrication of novel microwave absorbents. MOF precursors derived uniquely porous nanoarchitectures (NiO/NiCo2O4 lotus root-like nanoflakes derived from NiCo-MOFs) is never reported so far. Porous NiO/NiCo2O4 lotus root-like nanoflakes derived from NiCo-MOFs are fabricated via directly carbonizing the flake structured NiCo-MOFs precursor under high temperature. These results indicate that NiO/NiCo2O4 hybrid is a promising electromagnetic wave absorbing material, which can exhibit broad effective absorption bandwidth at low filler loading and thin thickness
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
