Tunable nano-effect of Cu clusters derived from MOF-on-MOF hybrids for electromagnetic wave absorption

The nano-effect of nano materials with diverse architecture, especially the construction, size and anisotropy, holds great potential for electromagnetic wave (EMW) absorption. Herein, a series of novel Cu nanoclusters decorating carbon composites ([email protected]) were prepared via a self-assembly synthesis strategy of metal organic frameworks (MOFs) using terephthalic acid (H2BDC) and trimesic acid (H3BTC). Corresponding pyrolysis products ([email protected]) of MOF-on-MOF hybrids (Cu-BDC/Cu-BTC) with tunable morphology can be obtained. Benefiting from the controllable size and anisotropy, the [email protected] nanocomposites exhibiting conductive loss and polarization loss. Especially, the effective absorption bandwidth and minimum reflection loss of [email protected] derived from pure Cu-BDC reached 10.80 GHz and −43.98 dB, while the matching thickness gradually thinned with the increasing of H3BTC. Finally, this work reveals the nano-effect of metal clusters on EMW absorption and provides a precise inspiration in developing MOF-on-MOF hybrids derived EMW absorption materials.