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

• Published in: ACS applied materials & interfaces Vol. 12; no. 36; pp. 40828 - 40837
• Main Authors: Prasad, Jagdees, Singh, Ashwani Kumar, Yadav, Amar Nath, Kumar, Ajit, Tomar, Monika, Srivastava, Amit, Kumar, Pramod, Gupta, Vinay, Singh, Kedar
• Format: Journal Article
• Language: English
• Published: American Chemical Society 09.09.2020
• Subjects: absorption; carbon; electromagnetic interference; electronic equipment; graphene oxide; molybdenum; nanohybrids; nanosheets; pollution; Raman spectroscopy; Surfaces, Interfaces, and Applications; transmission electron microscopy; X-ray diffraction; hybrid material; electron hopping; dielectric loss; electromagnetic interference; graphene
• ISSN: 1944-8244; 1944-8252; 1944-8252
• DOI: 10.1021/acsami.0c06219

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 (SET) as high as 40 dB, whereas MoS2 and MoS2-rGO hybrid lags far, with the average value of SET 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.