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- 2019
Zn还原氧化石墨烯(RGO)和ZnO/RGO自组装复合材料的电磁响应行为
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Abstract:
以天然鳞片石墨为原料制备氧化石墨烯（GO），通过Zn将其还原为石墨烯（RGO），且生成的ZnO附着在RGO表面。采用XRD、SEM、FTIR、Raman、TEM和矢量网络分析仪（VNA）研究了不同还原温度对ZnO/RGO复合材料形貌、结构、氧化程度、电磁损耗特性、德拜弛豫模型及电磁响应行为的影响。结果表明：还原温度为50℃时RGO还原后结构更加完整，层间距为0.89 nm时ZnO/RGO复合材料的介电常数和磁导率均较高，在17.15 GHz时反射率达到-41.2 dB，反射损耗小于-10 dB的带宽为3.67 GHz。 The graphene oxide (GO) was preparaed by natural flake graphite, then it was reduced to graphene(RGO) by Zn. ZnO is attached to the surface of RGO. The structure, morphology, degree of oxidation, electromagnetic loss properties, Debye relaxation and microwave absorbing properties of ZnO/RGO composite were investigated by XRD, Raman, SEM, TEM, FTIR and vector network analyzer (VNA). The results show that when the reduction temperature is 50℃, the structure of RGO is more complete after reduction and the layer spacing is 0.89 nm, the permittivity and permeability of ZnO/RGO composite are higher. At 17.15 GHz, the reflectivity of ZnO/RGO composite is -41.2 dB, the bandwidth of the reflection loss of ZnO/RGO composite below -10 dB is 3.67 GHz. 国家自然科学基金（51372108
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