Microwave absorption properties of CoS2 nanocrystals embedded into reduced graphene oxide
Microwave absorption properties of CoS2 nanocrystals embedded into reduced graphene oxide
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嵌入还原氧化石墨烯的 CoS2 纳米晶体的微波吸收特性
DOI：
10.1021/acsami.7b06982
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发表时间：
2017
影响因子：
9.5
通讯作者：
Zhongyuan Liu
中科院分区：
文献类型：
--
作者：
Can Zhang;Bochong Wang;Jianyong Xiang;Can Su;Congpu Mu;Fusheng Wen;Zhongyuan Liu
CoS2纳米颗粒和CoS2/还原氧化石墨烯（CoS2/rGO）纳米杂化物是通过独特的单模微波辅助水热法制备的。研究了不同rGO比例的CoS2/rGO复合材料的微波吸收性能。形貌分析表明CoS2纳米颗粒均匀地嵌入rGO中而没有聚集。 CoS2/rGO 纳米杂化物的复介电常数可以通过 rGO 比例进行人为调节。对于 CoS2/rGO 1:2 复合材料，厚度为 2.2 mm 时，在 10.9 GHz 时实现了 -56.9 dB 的最小反射损耗 (RL)；同时，在9.1-13.2 GHz频率范围内获得了超过-10 dB的RL。与其他rGO基材料相比，CoS2/rGO复合材料在相当薄的厚度下表现出优异的微波吸收能力，具有作为高效可调谐微波吸收体的巨大潜力。
CoS2nanoparticles and CoS2/reduced graphene oxide (CoS2/rGO) nanohybrids were fabricated by a unique single-mode microwave-assisted hydrothermal method. The microwave absorption properties of CoS2/rGO composites with different rGO proportions were investigated. Morphology analysis indicated that the CoS2nanoparticles were uniformly embedded into rGO without aggregation. The complex permittivity of CoS2/rGO nanohybrids could be artificially tuned with the rGO proportions. For the CoS2/rGO 1:2 composite, the minimum reflection loss (RL) of −56.9 dB was achieved at 10.9 GHz for the thickness of 2.2 mm; meanwhile, the RL exceeding −10 dB were obtained in the frequency range of 9.1–13.2 GHz. Compared with other rGO-based materials, CoS2/rGO composite exhibited superior microwave absorption ability at a rather thin thickness and it has great potential to be used as a high-efficiency and tunable microwave absorber.