Molybdenum Disulfide-Wrapped Carbon Nanotube-Reduced Graphene Oxide (CNT/MoS₂-rGO) Nanohybrids for Excellent and Fast Removal of Electromagnetic Interference Pollution

Abstract

Electromagnetic interference (EMI) pollution has now become a subject of great concern with the rapid development of delicate electronic equipment in commercial, civil, and military operations. There has been a surge in pursuit of light-weight, adaptable, effective, and efficient EMI screening materials in recent years. The present article addresses a simple and sensitive approach to synthesize a core/shell carbon nanotube/MoS₂ heterostructure supported on reduced graphene oxide (CNT/MoS₂-rGO nanohybrid) as an efficient electromagnetic shielding material. The structural and morphological characteristics were accessed through X-ray diffraction, transmission electron microscopy, scanning electron microscopy, and Raman spectroscopy, augmenting successful formation of the CNT/MoS₂-rGO nanohybrid. The shielding performance of the as-synthesized samples has been accessed in a wide frequency range of 8-12 GHz. A CNT/MoS₂-rGO nanohybrid demonstrates a better EMI shielding performance in comparison to MoS₂ nanosheets and MoS₂-rGO nanohybrid individually. The CNT/MoS₂-rGO nanohybrid having a thickness ∼1 mm shows excellent total shielding effectiveness (SE_T) as high as 40 dB, whereas MoS₂ and MoS₂-rGO hybrid lags far, with the average value of SE_T as 7 and 28 dB, respectively. It also demonstrates that the nanohybrid CNT/MoS₂-rGO shields the EM radiation by means of absorption through several functional defects and multiple interfaces present in the heterostructure. Herein, we envision that our results provide a simple and innovative approach to synthesize the light-weight CNT/MoS₂-rGO nanohybrid having flexibility and high shielding efficiency and widen its practical applications in stealth technology.