A novel approach to prepare polyaniline/Polypyrrole@Cu-BTC/NH2-MIL-101(Fe) MOFs for electromagnetic wave absorption

A nano-sized Cu-MOF with high peroxidase-like activity and its potential application in colorimetric detection of H2O2 and glucose

“…The characteristic peaks at 2q ¼ 6.7 , 9.5 , 11.6 , 13.4 , 14.9 , 17.5 , 19.1 , 25.9 and 39.1 correspond to the (200), ( 220), ( 222), (400), (420), (511), ( 440), ( 731) and (882) crystal planes. [48][49][50] The narrow and sharp peaks and the main peaks are coincided well with the simulated peaks, which prove that the synthesized material is the target product. The SEM image shows that the Cu-MOF sample is mainly composed of polyhedron, and some irregular particles can also be seen on the surface of the sample (Fig.…”

Synergetic Dielectric and Magnetic Losses of a Core–Shell Co/MnO/C Nanocomplex toward Highly Efficient Microwave Absorption

“…In Figure 4a,b, the obvious resonance peaks from 12 to 18 GHz represent the polarization relaxation phenomenon. 42 The dielectric loss (ε″) consists of ε p ″ and ε c ″ in eqs 4 and 5, the ε″ decreases with the increase of frequency, which was originated from frequency dispersion phenomenon, and the polarization relaxation is ascribed to polarization loss, including dipole polarization loss and interfacial polarization when the frequency is beyond 10 6 GHz. 43 For the Co/MnO/C nanocomplex, the outer layers have abundant polarization charges with uneven distribution accumulating at the interface border between the carbon layer and the Co/MnO nanocomplex, contributing to the interfacial polarization.…”

BaTiO3@C Core–Shell Nanoparticle/Paraffin Composites for Wide-Band Microwave Absorption

“…Generally, the absorption properties of the EM wave of a material depend on both the impedance matching and attenuation characteristics that are closely related to its microstructure and the EM properties. − Figure illustrates the microwave dissipation process of the BaTiO 3 @C/paraffin composites in the present work. The enhanced EM absorption performance of the BaTiO 3 @C/paraffin composites depends on the microstructure of the composite and the properties such as electron hopping, interfacial polarization, charge accumulation, and conductive dissipations . In the case of materials composed of core–shell NPs and matrix, the ε′ mainly originates from the interfacial polarization between the core and shell of NPs and the matrix, and ε″ dominantly results from conductivity among the NPs .…”

“…The enhanced EM absorption performance of the BaTiO 3 @C/paraffin composites depends on the microstructure of the composite and the properties such as electron hopping, interfacial polarization, charge accumulation, and conductive dissipations. 38 In the case of materials composed of core−shell NPs and matrix, the ε′ mainly originates from the interfacial polarization between the core and shell of NPs and the matrix, and ε″ dominantly results from conductivity among the NPs. 39 With the introduction of the carbon layer, ε′ increases with the increased carbon content.…”