Microwave absorption properties of CoS2/TiO2/Ti3C2Tx MXene composites
Cobalt disulfide (CoS<sub>2</sub>) nanoparticles were combined with varying amounts of MXene (Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub>) sheets via a hydrothermal method for microwave absorption applications. X-ray diffraction confirmed the coexistence of crystalline CoS<sub>2</sub>, Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub>, and TiO<sub>2</sub> phases, revealing the partial surface oxidation of Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> sheets. Scanning electron microscope images demonstrated that CoS<sub>2</sub> nanoparticles were uniformly anchored on the MXene sheets, and X-ray photoelectron spectra showed the presence of Co-S, Ti-C, and Ti-O bonds, indicating strong interfacial interactions. The CoS<sub>2</sub>-35 wt % Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> composite exhibited a minimum reflection loss of -15.23 dB at a matching thickness of 2.4 mm and a broad effective absorption bandwidth of 7.3 GHz (from 10.7 to 18 GHz) at 3.2 mm, which was mainly attributed to impedance matching. Synergistically, the presence of multiple interlayer interactions and the extension of the wave-propagation path within the layered microstructure of the CoS<sub>2</sub>-35 wt % Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> composite mutually contribute to wave attenuation.
Authors
- Seyyed Morteza Masoudpanah (ORCID: https://orcid.org/0000-0002-5950-0806)
- B. Aslibeiki (ORCID: https://orcid.org/0000-0003-3366-0761)
- Mohammad Mahdi Derakhshani
- Sana Hosseini (ORCID: https://orcid.org/0000-0001-8512-3605)
- Tapati Sarkar (ORCID: https://orcid.org/0000-0003-4754-2504)
Institutions
- Uppsala University (SE)
- University of Tabriz (IR)
- Iran University of Science and Technology (IR)
Publication Details
- Journal
- iScience
- Published
- 2025-12-18
- DOI
- https://doi.org/10.1016/j.isci.2025.114464
- Primary Topic
- Electromagnetic wave absorption materials
- Type
- article
- Field-Weighted Citation Impact
- 0.00