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Thermal conversion of wheat-like metal organic frameworks to achieve MgO/carbon composites with tunable morphology and microwave response ability

Abstract

Dielectric materials are essential part of microwave absorbers due to their nice chemical stability, low density and excellent microwave dissipation ability, and how to enhance the complex permittivity has always been the research focus. Dielectric constant is closely related to polarization and conduction. In view of that there are many pathways to boost polarization behaviors and electrical conductivity, hybrid stuff is the most common technique to realize the integration of multiple loss mechanisms. However, it still faces some inevitable issues like heterogeneous particles distribution, rugged interfaces, and poor repeatability. This study reports a simple thermal conversion strategy to achieve magnesium oxide embedded graphitized carbon matrix. With the heating treatment condition varying, nanoporous carbon texture with different morphologies and distinct conductivity can be obtained, which is beneficial to the enhanced polarization processes, tip effect and space scattering, as well as conduction attenuation. Thus, the obtained nanocomposites can achieve controllable performance, such as extension of effective bandwidth, maximum absorbing peaks shift towards low frequency and lightweight characteristics. These findings provide new insights into the application potential of metal organic framework; in addition, our method offers good case study of rational design to complete numerous optimization strategies.

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Publication details

The article was received on 23 Jul 2018, accepted on 08 Oct 2018 and first published on 11 Oct 2018


Article type: Paper
DOI: 10.1039/C8TC03628D
Citation: J. Mater. Chem. C, 2018, Accepted Manuscript
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    Thermal conversion of wheat-like metal organic frameworks to achieve MgO/carbon composites with tunable morphology and microwave response ability

    B. Quan, X. Liang, H. Yi, Y. Chen, J. Xiang, G. Xu and G. Ji, J. Mater. Chem. C, 2018, Accepted Manuscript , DOI: 10.1039/C8TC03628D

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