Solvothermal synthesis of flower-like CoS hollow microspheres with excellent microwave absorption properties

Abstract

In this study, flower-like CoS hollow spheres (CHSs), synthesized via a facile solvothermal method in the presence of CTAB, were initially investigated as microwave absorbers.

Synthesis of Controllable Nickel Chalcogenide Nano‐Hollow Spheres and Their Tunable Absorbing Properties

“…Our group synthesized a series of CuS particles with multistage nanostructures by a simple wet chemical method, and the CuS-PVDF composites (5 wt%) achieved the minimum reflection loss of À 102 dB at 7.7 GHz with thin absorber thickness of 3.5 mm. [28] Other metal sulfides have also shown great potential in this field, such as CdS, [29] ZnS, [30] CoS, [31] PbS [32] etc. Among these TMDCs, nickel-sulfur compounds exhibit a variety of phases and structures because the valence state of nickel is easy to adjust, which result in coexisting of many phases in the synthesis.…”

Reduced graphene oxide decorated with octahedral NiS2/NiS nanocrystals: facile synthesis and tunable high frequency attenuation

“…Zhao and co-workers 2 have constructed hierarchical hollow CuS microspheres and found that the minimum reection loss of paraffin-based composites (50 wt%) is À17.5 dB and the effective bandwidth is 3.0 GHz with thin absorber thickness of 1.1 mm. Other metal suldes such as CdS, 19 Bi 2 S 3 , 20 CoS, 21 PbS, 22 NiS 2 @MoS 2 , 23 etc. have been demonstrated as novel microwave absorbers with a remarkable reection loss.…”

Fe3O4 nanoparticles decorated on a CuS platelet-based sphere: a popcorn chicken-like heterostructure as an ideal material against electromagnetic pollution

“…A variety of studies have been devoted to the synthesis of EA materials to obtain EA materials having properties such as strong absorption capability, wide effective absorption bandwidth, high thermal stability, lightweightedness, and anti-oxidation. [6][7][8] With the development of technology, various strategies have been explored to synthesize functional materials to achieve better EA performance; these materials include metal oxides or suldes, such as ZnO, 9 CoFe 2 O 4 , 10 SnO 2 , 11 CoS, 12 and CuS 13-15 as well as carbon materials such as carbon nanotubes (CNTs), 16,17 graphene or reduced graphene oxide (RGO), 18 carbon bers (CFs), 19 and/or their hybrids. 20,21 Among the many existing materials, heterostructures of magnetic loss-type and dielectric loss-type materials produce great enhancement in EA performance; these materials include Fe 3 32 graphene CuS, 33 and CuS/ ZnS.…”