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Three-Dimensional Hierarchical Architecture of the TiO2/Ti3C2Tx/RGO Ternary Composite Aerogel for Enhanced Electromagnetic Wave Absorption
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2018-05-21 00:00:00 , DOI: 10.1021/acssuschemeng.7b04883 Yuan Tong 1 , Man He 1 , Yuming Zhou 1 , Shuangxi Nie 2 , Xi Zhong 1 , Lidan Fan 1 , Tingyuan Huang 1 , Qiang Liao 1 , Yongjuan Wang 1
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2018-05-21 00:00:00 , DOI: 10.1021/acssuschemeng.7b04883 Yuan Tong 1 , Man He 1 , Yuming Zhou 1 , Shuangxi Nie 2 , Xi Zhong 1 , Lidan Fan 1 , Tingyuan Huang 1 , Qiang Liao 1 , Yongjuan Wang 1
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Tunable and high-efficiency electromagnetic wave (EMW) absorption materials composed of a three-dimensional (3D) hierarchical reduced graphene oxide (RGO) aerogel network entrapped with TiO2/Ti3C2Tx hybrids were fabricated by a hydrothermal method and a mild chemical reduction treatment. The incorporation of the TiO2/Ti3C2Tx micronanoheterostructure and construction of the 3D well-designed hierarchical interconnected network can significantly reduce the agglomeration of RGO sheets together with the beneficial effect of a better impedance match. When the filler loading is 10 wt %, the maximum reflection loss of the composite aerogel reaches up to −65.3 dB with a matching thickness of 2.5 mm. Meanwhile, the effective absorption bandwidth (RL < −10 dB) is 4.3 GHz with the coating thickness of only 2.0 mm, and the tunable absorption bandwidth achieves at 13.74 GHz via modulating the absorber thicknesses in a range from 1.5 to 5.0 mm. The enhanced EMW absorbing performance is closely related to highly porous conductive networks, better impedance match, multiple reflection, and scattering and defective polarization properties. Consequently, these results indicate a promising route to fabricate a lightweight, thin thickness, highly efficient, and broadband EMW absorber, which can facilite the control and purification of the EM environment and realize the sustainable utilization of EMW.
中文翻译：
增强电磁波吸收的TiO 2 / Ti 3 C 2 T x / RGO三元复合气凝胶的三维层次结构
采用水热法制备了由TiO 2 / Ti 3 C 2 T x杂化物包裹的三维（3D）分层还原氧化石墨烯（RGO）气凝胶网络组成的可调谐高效电磁波吸收材料。轻度化学还原处理。TiO 2 / Ti 3 C 2 T x的引入精心设计的3D分层互连网络的微观纳米结构和构造可以显着减少RGO板的团聚，并带来更好的阻抗匹配的有益效果。当填料含量为10 wt％时，复合气凝胶的最大反射损失达到-65.3 dB，匹配厚度为2.5 mm。同时，有效吸收带宽（RL <-10 dB）为4.3 GHz，涂层厚度仅为2.0 mm，通过在1.5至5.0 mm范围内调整吸收层厚度，可调谐吸收带宽达到13.74 GHz。增强的EMW吸收性能与高度多孔的导电网络，更好的阻抗匹配，多次反射和散射以及不良的极化特性密切相关。所以，
更新日期：2018-05-21
中文翻译：
增强电磁波吸收的TiO 2 / Ti 3 C 2 T x / RGO三元复合气凝胶的三维层次结构
采用水热法制备了由TiO 2 / Ti 3 C 2 T x杂化物包裹的三维（3D）分层还原氧化石墨烯（RGO）气凝胶网络组成的可调谐高效电磁波吸收材料。轻度化学还原处理。TiO 2 / Ti 3 C 2 T x的引入精心设计的3D分层互连网络的微观纳米结构和构造可以显着减少RGO板的团聚，并带来更好的阻抗匹配的有益效果。当填料含量为10 wt％时，复合气凝胶的最大反射损失达到-65.3 dB，匹配厚度为2.5 mm。同时，有效吸收带宽（RL <-10 dB）为4.3 GHz，涂层厚度仅为2.0 mm，通过在1.5至5.0 mm范围内调整吸收层厚度，可调谐吸收带宽达到13.74 GHz。增强的EMW吸收性能与高度多孔的导电网络，更好的阻抗匹配，多次反射和散射以及不良的极化特性密切相关。所以，
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