期刊
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
卷 157, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jpcs.2021.110222
关键词
NiS2; Reduced graphene oxide; Microwave absorption; Reflection loss
This study successfully prepared rGO/NiS2 nanocomposites with high reflection loss and thin thickness, and found that the microwave absorption performance of the nanocomposites can be improved by adjusting the mass fraction of NiS2.
Microwave absorption materials with high reflection loss (RL), thin thickness and wide absorption bandwidth have attached a lot of attention for overcoming microwave pollution. Nanocomposites composed of carbon-based materials and metal sulfide have excellent microwave absorption properties, which meet the high RL of low weight microwave absorbing materials. In this study, binary nanocomposites of spherical-like nickel sulfide (NiS2) decorated on reduced graphene oxide (rGO) were successfully prepared using a one-step single-mode microwave-assisted hydrothermal method. Morphological analysis using scanning electron microscopy and transmission electron microscopy indicated that the NiS2 particles were evenly wrapped by rGO. The rGO/NiS2 nanocomposites were used as microwave absorption materials and their electromagnetic parameters were measured in the range of 1.0-18.0 GHz. For the rGO/NiS2 1:5 nanocomposite with a very thin thickness of 1.59 mm, the minimum RL and effective absorption bandwidth reached -33.72 dB and 4.37 GHz, respectively. The microwave absorption performance of the nanocomposites improved by adjusting the impedance upon changing the mass fraction of NiS2. Therefore, rGO/NiS2 nanocomposites with high RL and thin thickness have great application prospects for microwave absorption.
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