VS2/ZnFe2O4 composites with ZnFe2O4 addition of 0-15% were prepared by a hydrothermal route to examine composition-dependent regulation of their electromagnetic parameters. For specimens containing 30 wt% absorber in paraffin, Z2, with a ZnFe2O4 addition of 5%, showed the strongest calculated absorption, yielding a minimum reflection loss of -45.1 dB at 7.85 GHz and an effective absorption bandwidth of 3.5 GHz (6.9-10.4 GHz) at 2.75 mm. Z2 exhibited the largest dielectric loss and a broader impedance-matched region than the other compositions, whereas the permeability of all samples remained close to unity. Room-temperature M-H curves of Z2-Z4 were weak, quasi-linear and unsaturated over ±10 kOe, with magnetization values of approximately 0.039-0.065 emu g-1 at +10 kOe. Altogether, the electromagnetic and magnetic data support a predominant dielectric-dissipation and impedance-regulation role for the ZnFe2O4-derived component, while any magnetic contribution is secondary under the present measurement conditions. The non-monotonic composition dependence demonstrates that a moderate ZnFe2O4 addition is more effective than continuously increasing the nominal ferrite content.
In this work, we report the reactivity of disilene [(TMS)₂N(η¹-Cp*Si═Si(η¹-Cp*N(TMS)₂] (1) towards CO₂ and oxalyl chloride (COCl)2. Reaction of 1 with CO₂ produced a highly strained disilaoxirane (2) via CO...
Different synthetic approaches using similar starting materials yield two CPs with differing photophysical properties and applications (photo-conductivity and -sensitization), which are explained through rational design.
Light-driven Fe III → Fe II reduction in DMF: crystallographic, electrochemical and DFT evidence for potential solar energy storage.
Hollow Co/Co 3 O 4 @NC composites derived from ZIF-67@PDA are constructed by controlled pyrolysis and PDA coating, enabling synergistic dielectric–magnetic loss and optimized impedance matching for efficient microwave absorption.
