One-dimensional MOF-derived magnetic composites for efficient microwave absorption at ultralow thickness through controllable hydrogen reduction

Abstract

Magnetic materials with ingeniously designed structure may be utilized as highly efficient microwave absorbing materials (MAMS) working at ultralow matching thickness. However, it remains a challenge to decrease the matching...

Hierarchical and Porous Structures of Carbon Nanotubes‐Anchored MOF Derivatives Bridged by Carbon Nanocoils as Lightweight and Broadband Microwave Absorbers

“…Normally, the attenuation constant (α) is calculated by the following formula as the analysis of the inherent attenuation ability [ 36 ] $$\[ \begin{array}{*{20}{c}}{\alpha = \frac{{\sqrt 2 \pi f}}{c}\: \times \sqrt {\left( {\mu \prime \prime \varepsilon \prime \prime - \mu \prime \varepsilon \prime } \right) + \sqrt {{{(\mu \prime \prime \varepsilon \prime \prime - \mu \prime \varepsilon \prime )}^2} + {{(\varepsilon \prime \mu \prime \prime + \varepsilon \prime \prime \mu \prime \prime )}^{2}}} } }\end{array} \]$$…”

“…Normally, the attenuation constant (α) is calculated by the following formula as the analysis of the inherent attenuation ability [36]…”

Microwave Absorption Performance Evaluation of Carbonized Derivatives of Fe3O4@MOF-74 with Controllable Morphologies

“…The interfacial polarization mainly occurred at the interface of two phases with different permittivity and conductivity values, which led to Debye relaxation. In the fast alternating electromagnetic field environment, the interface between Fe 3 O 4 and the carbonized MOF was easy to accumulate inductive charge and caused interfacial polarization. , In addition, the spines of the surface could be used as the polarization center and scattering center. It was beneficial to enhance polarization relaxation.…”

Bimetallic ZIF-derived conductive network of Co–Zn@NPC@MWCNT nanocomposites for efficient electromagnetic wave absorption in the whole X-band

“…[28][29][30][31] It has been noted that the pyrolysis of MOF-derived materials at high temperature can supply an effective approach to meet these requirements. 1,[32][33][34][35] In recent years, as novel EM-wave absorbers, heterobimetallic MOF derivatives, with various structural topologies stemming from the centers of metal ions, the structures of the organic ligand, and their high porosity and adjustable EM parameters, have attracted wide attention for EM-wave absorption. 8,32,36,37 Besides, due to the orderly and periodic arrangement of organic ligands and heterobimetallic ions in MOF precursors, the obtained magnetic heterobimetallic/carbon compounds have demonstrated excellent chemical homogeneity.…”

“…28–31 It has been noted that the pyrolysis of MOF-derived materials at high temperature can supply an effective approach to meet these requirements. 1,32–35…”