Lightweight and High-Performance Microwave Absorber Based on 2D WS2–RGO Heterostructures

• Published in: Nano-micro letters Vol. 11; no. 1; pp. 1 - 15
• Main Authors: Zhang, Deqing, Liu, Tingting, Cheng, Junye, Cao, Qi, Zheng, Guangping, Liang, Shuang, Wang, Hao, Cao, Mao-Sheng
• Format: Journal Article
• Language: English
• Published: Singapore Springer Singapore 09.05.2019; Springer Nature B.V; SpringerOpen
• Subjects: 2D WS2 nanosheets; Dielectric properties; Electromagnetic radiation; Electronic properties; Engineering; Graphene; Heterostructure; Heterostructures; Lightweight; Microwave absorbers; Microwave absorption; Nanomaterials; Nanoscale Science and Technology; Nanostructure; Nanotechnology; Nanotechnology and Microengineering; Reduced graphene oxide; Thickness; Weight reduction; Heterostructure; 2D WS; Microwave absorption; Reduced graphene oxide; nanosheets
• ISSN: 2311-6706; 2150-5551
• DOI: 10.1007/s40820-019-0270-4

Highlights WS 2 –rGO nanosheets with ultra-small thicknesses and ultra-lightweight, were successfully prepared by a facile hydrothermal method. The WS 2 –rGO isomorphic heterostructures exhibited remarkable microwave absorption properties. Two-dimensional (2D) nanomaterials are categorized as a new class of microwave absorption (MA) materials owing to their high specific surface area and peculiar electronic properties. In this study, 2D WS 2 –reduced graphene oxide (WS 2 –rGO) heterostructure nanosheets were synthesized via a facile hydrothermal process; moreover, their dielectric and MA properties were reported for the first time. Remarkably, the maximum reflection loss (RL) of the sample–wax composites containing 40 wt% WS 2 –rGO was − 41.5 dB at a thickness of 2.7 mm; furthermore, the bandwidth where RL < − 10 dB can reach up to 13.62 GHz (4.38–18 GHz). Synergistic mechanisms derived from the interfacial dielectric coupling and multiple-interface scattering after hybridization of WS 2 with rGO were discussed to explain the drastically enhanced microwave absorption performance. The results indicate these lightweight WS 2 –rGO nanosheets to be potential materials for practical electromagnetic wave-absorbing applications.