Ultrabroad band microwave absorption from hierarchical MoO3/TiO2/Mo2TiC2T x hybrids via annealing treatment

Autor: Feiyue Hu, Fan Zhang, Xiaohan Wang, Yaya Li, Hailong Wang, Rui Zhang, Hongxia Li, Bingbing Fan
Jazyk: angličtina
Rok vydání: 2022
Předmět:
Zdroj: Journal of Advanced Ceramics, Vol 11, Iss 9, Pp 1466-1478 (2022)
Druh dokumentu: article
ISSN: 2226-4108
2227-8508
DOI: 10.1007/s40145-022-0624-0
Popis: Abstract Two-dimensional (2D) transition metal carbide MXene-based materials hold great potentials applied for new electromagnetic wave (EMW) absorbers. However, the application of MXenes in the field of electromagnetic wave absorption (EMA) is limited by the disadvantages of poor impedance matching, single loss mechanism, and easy oxidation. In this work, MoO3/TiO2/Mo2TiC2T x hybrids were prepared by the annealing-treated Mo2TiC2T x MXene and uniform MoO3 and TiO2 oxides in-situ grew on Mo2TiC2T x layers. At the annealing temperature of 300 °C, the minimum reflection loss (RLmin) value of MoO3/TiO2/Mo2TiC2T x reaches −30.76 dB (2.3 mm) at 10.18 GHz with a significantly broadening effective absorption bandwidth (EAB) of 8.6 GHz (1.8 mm). The in-situ generated oxides creating numerous defects and heterogeneous interfaces enhance dipolar and interfacial polarizations and optimize the impedance matching of Mo2TiC2T x . Considering the excellent overall performance, the MoO3/TiO2/Mo2TiC2T x hybrids can be a promising candidate for EMA.
Databáze: Directory of Open Access Journals
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