Multi-dimensional Sb2S3@MoS2 heterojunctions for electromagnetic wave absorption

Abstract

Low-dimensional materials exhibit excellent electromagnetic wave absorption (EMWA) properties owing to their unique structures and high specific surface areas. However, their intricate preparation processes and inadequate stability remain a major challenge. Herein, the Sb₂S₃@MoS₂ heterojunctions with one-dimensional rod-like Sb₂S₃ and two-dimensional sheet-like MoS₂ were synthesized via the hydrothermal reaction. The overall synthesis process is simple and the resulted sample exhibits excellent stability. When the molar ratio of Sb₂S₃ to MoS₂ is 5: 5, the minimum reflection loss value of −48.09 dB is achieved at a thickness of 2.60 mm. The maximum effective absorption bandwidth value of 4.00 GHz (11.52-15.52 GHz) is observed at a thickness of 2.00 mm. The superior EMWA performance can primarily be attributed to the interfacial polarization, multiple scattering and reflections, conductive loss, and impedance matching. This work establishes a solid foundation for the future design and synthesis of low-dimensional materials with excellent wave-absorbing activity and stability.