The Effect of Copper Based Mofs Morphology on the Microwave Absorption Performance of Mofs@Mwcnts Hybrids

Abstract

Metal-organic frameworks of MOF-199 with three different morphologies of cubic (hexahedral)-A, octahedral-B and tetradecahedral-C were prepared by solvothermal method via adjusting the amount of coordination modulator of lauric acid (LA). Meanwhile, absorbing hybrids of MOF-199@MWCNTs with three-dimensional structure were constructed via π-π stacking between benzene ring π-electrons in the organic ligand of MOF-199 and π electronic of MWCNTs.SEM images demonstrated that three different morphology MOFs particles were obtained, with an average size of approximately 2 μm. The aim of this paper is to investigate the influence of MOF morphology on the absorbing performance. The RLmin of MOF-199-C@MWCNTs hybrids reaches -48.16 dB due to an increased number of planes and the heterogeneous interfaces of tetradecahedral MOF-199-C. This is higher than the RLmin of cubic MOF-199-A@MWCNTs (-23.21 dB) and octahedral MOF-199-B@MWCNTs (-45.77 dB) hybrids. The results indicate that increasing reflection, scattering, and heterogeneous interfaces enhances absorption performance.

Keywords: MOFs, Absorbing performance, morphology, Heterogeneous interface