| HE Jun-zhe,SUN Xin,SHU Jin-cheng,YANG Xuan,CAO Mao-sheng.Microwave Absorption Performance of Spindle-Shaped ZnO/Reduced Graphene Oxide Heterostructure[J],49(2):88-94 |
| Microwave Absorption Performance of Spindle-Shaped ZnO/Reduced Graphene Oxide Heterostructure |
| Received:October 13, 2019 Revised:February 20, 2020 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2020.02.011 |
| KeyWord:spindle-shaped ZnO rod reduced graphene oxide heterostructure electromagnetic characteristics microwave absorption performance |
| Author | Institution |
| HE Jun-zhe |
1.Beijing Institute of Environmental Characteristics, Beijing , China |
| SUN Xin |
1.Beijing Institute of Environmental Characteristics, Beijing , China |
| SHU Jin-cheng |
2.Beijing Institute of Technology, Beijing , China |
| YANG Xuan |
1.Beijing Institute of Environmental Characteristics, Beijing , China |
| CAO Mao-sheng |
2.Beijing Institute of Technology, Beijing , China |
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| Abstract: |
| This work aims to adjust the electromagnetic matching of graphene to achieve the best microwave absorption performance. Graphene oxide was prepared by improved Hummers method. The spindle-shaped ZnO rods wrapped by reduced graphene oxide (S-ZnO/r-GO) with heterostructure were synthesized by the hydrothermal method at 140 ℃ with Zinc nitrate hexahydrate, bis-hexamethylene triamine and graphene oxide as raw materials. The composition, morphology and microstructure of S-ZnO/r-GO were characterized by X-ray diffractometer (XRD), scanning electron microscope (SEM) and transmission electron microscopy (TEM). The electromagnetic properties of S-ZnO/r-GO composite with different mass ratios were tested by vector network analyzer in the frequency range of 2~18 GHz through coaxial method, and the microwave reflection loss of the composite was calculated. The interlaced spindle-shaped ZnO rods with uniform shapes were wrapped with plenty crumpled r-GO sheets, thus constructing an interconnected 3D structure. Both the introduction of spindle-shaped ZnO and the construction of 3D structure significantly improved the electromagnetic characteristics and microwave response of S-ZnO/r-GO heterostructure in the frequency range of 2~18 GHz. A maximum reflection loss value of -40 dB was achieved at a thickness of 2.0 mm and a frequency of 14.8 GHz. The effective absorption bandwidth almost covered the whole Ku band. The composites of S-ZnO/r-GO exhibit prominent microwave absorption performance and wide effective absorption bandwidth and have certain application prospects. |
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