Jump to main content
Jump to site search

Issue 16, 2017
Previous Article Next Article

Constructing hierarchical hollow CuS microspheres via a galvanic replacement reaction and their use as wide-band microwave absorbers

Author affiliations

Abstract

In this study, hollow three-dimensional CuS hierarchical microspheres were prepared via a facile galvanic replacement reaction. The hollow flower-like CuS microspheres were characterized by XRD, Raman, XPS, SEM and TEM techniques, which revealed that numerous nanoflakes were self-assembled to construct hollow flowers. Based on time-dependent experiments, a plausible formation mechanism (galvanic replacement reaction) was proposed. Paraffin-based composites, containing 50 wt% hollow CuS, exhibited outstanding microwave absorption capabilities, which were attributed to the suitable impedance match and dielectric loss. The minimal reflection loss was −17.5 dB and the effective bandwidth was 3.0 GHz with thin absorber thickness of 1.1 mm. In addition, we put forward a novel solution to evaluate the microwave absorption efficiency. The high efficiency microwave absorption properties originate from the electric/dielectric polarization and unique hollow flower-like structure. The hollow structures can adjust the dielectric properties to obtain good impedance matching. Moreover, the two-dimensional flakes and hollow flowers can induce more multiple reflection and scattering, which consumes more microwave energy. This study has led to a novel useful method for the design of hollow structures used as high efficiency microwave absorbers.

Graphical abstract: Constructing hierarchical hollow CuS microspheres via a galvanic replacement reaction and their use as wide-band microwave absorbers

Back to tab navigation

Supplementary files

Publication details

The article was received on 02 Feb 2017, accepted on 27 Feb 2017 and first published on 27 Feb 2017


Article type: Paper
DOI: 10.1039/C7CE00235A
Citation: CrystEngComm, 2017,19, 2178-2186
  •   Request permissions

    Constructing hierarchical hollow CuS microspheres via a galvanic replacement reaction and their use as wide-band microwave absorbers

    B. Zhao, X. Guo, Y. Zhou, T. Su, C. Ma and R. Zhang, CrystEngComm, 2017, 19, 2178
    DOI: 10.1039/C7CE00235A

Search articles by author

Spotlight

Advertisements