Fabrication of Co-Zn stannate (CoxZn1-xSnO3) hollow balls based 3D rGO aerogels with excellent electromagnetic wave absorption properties
Fabrication of Co-Zn stannate (CoxZn1-xSnO3) hollow balls based 3D rGO aerogels with excellent electromagnetic wave absorption properties
复制标题
具有优异电磁波吸收性能的 Co-Zn 锡酸盐 (CoxZn1-xSnO3) 空心球基 3D rGO 气凝胶的制备
DOI：
10.1016/j.jallcom.2020.156165
复制
发表时间：
2020-12-10
影响因子：
6.2
通讯作者：
Liu, Hezhou
中科院分区：
文献类型：
--
作者：
Guo, Runjiang;Huo, Weixing;Liu, Hezhou
在本报告中，我们通过离子共沉淀法合成了新型钴 - 锌共掺杂锡酸盐（$Co_xZn_{1 - x}SnO_3$）空心球。所合成的$Co_xZn_{1 - x}SnO_3$表现出优异的介电和磁性能，这有利于微波吸收。我们还将所制备的$Co_xZn_{1 - x}SnO_3$纳米粒子嵌入到还原氧化石墨烯（rGO）三维气凝胶（$rGO@Co_xZn_{1 - x}SnO_3$）中以增强其微波吸收能力。我们利用了几种表征技术分别研究了$Co_xZn_{1 - x}SnO_3$和$rGO@Co_xZn_{1 - x}SnO_3$气凝胶的结构、形貌、组成和比表面积。此外，还测量了各种所制备样品的相关电磁参数以模拟三维$rGO@Co_xZn_{1 - x}SnO_3$气凝胶的微波吸收能力。模拟结果表明，$rGO@Co_{0.7}Zn_{0.3}SnO_3$在10.6 GHz时的最大反射损耗（$RL_{max}$）可达 -38 dB，吸收体厚度仅为3 mm。$rGO@Co_{0.7}Zn_{0.3}SnO_3$空心球的最大有效吸收带宽（EAB）超过8 GHz（从10 GHz到18 GHz），吸收体厚度仅为3.5 mm。性能的增强归因于高衰减能力、合理的阻抗匹配、多重界面极化和适当的协同效应。这项工作表明，具有轻质和强微波吸收能力的$rGO@Co_xZn_{1 - x}SnO_3$气凝胶作为微波吸收体具有巨大的潜力。（C）2020爱思唯尔公司。保留所有权利。
In this report, we synthesized novel Co-Zn co-doped stannate (CoxZn1-xSnO3) hollow balls via an ion coprecipitation method. The as synthesized CoxZn1-xSnO3 exhibited excellent dielectric and magnetic properties, which were conducive to the microwave absorption. We also embedded the as prepared CoxZn1-xSnO3 nanoparticles into rGO 3D aerogels (rGO@CoxZn1-xSnO3) to enhance their microwave absorbability. Several characterization techniques were utilized to investigate the structures, morphologies, compositions and specific surface areas of the CoxZn1-xSnO3 and rGO@CoxZn1-xSnO3 aerogels respectively. In addition, associated electromagnetic parameters of various as prepared samples were also measured to simulate the microwave absorbability of the 3D rGO@CoxZn1-xSnO3 aerogels. The simulation results indicated that the maximum reflection loss (RLmax of rGO@Co0.7Zn0.3SnO3 could reach up to -38 dB at 10.6 GHz with an absorber thickness of only 3 mm. The maximum efficient absorption bandwidth (EAB) of the rGO@Co0.7Zn0.3SnO3 hollow balls was over 8 GHz (from 10 GHz to 18 GHz) with an absorber thickness of only 3.5 mm. The enhanced performance was ascribed to high attenuation capability, reasonable impedance matching, multiple interfacial polarizations and proper synergistic effect. This work demonstrated that the rGO@CoxZn1-xSnO3 aerogels with light-weight and strong microwave absorbability have great potential to be used as a microwave absorber. (C) 2020 Elsevier B.V. All rights reserved.