Deng Baiwen, Xiang Zhen, Xiong Juan, Liu Zhicheng, Yu Lunzhou, Lu Wei
Shanghai Key Lab. of D&A for Metal-Functional Materials, School of Materials Science & Engineering, Tongji University, Shanghai, 201804, People's Republic of China.
School of Materials Science & Engineering, University of Shanghai for Science and Technology, Shanghai, 200092, People's Republic of China.
Nanomicro Lett. 2020 Feb 18;12(1):55. doi: 10.1007/s40820-020-0398-2.
Electromagnetic pollution has been causing a series of problems in people's life, and electromagnetic absorbers with lightweight and broad absorbing bandwidth properties are widely desired. In this work, novel sandwich-like 2D laminated Fe&TiO nanoparticles@C nanocomposites were rationally designed and successfully developed from the MXene-MOFs hybrids. The formation of Fe and rutile-TiO nanoparticles sandwiched by the two-dimensional carbon nanosheets provided strong electromagnetic energy attenuation and good impedance matching for electromagnetic wave (EMW) absorption. As expected, the nanocomposites achieved a broad effective absorption bandwidth of 6.5 GHz at a thickness of only 1.6 mm and the minimum reflection loss (RL) value of - 51.8 dB at 6.6 GHz with a thickness of 3 mm. This work not only provides a good design and fabricating concept for the laminated metal and functional nanoparticles@C nanocomposites with good EMW absorption, but also offers an important guideline to fabricate various two-dimensional nanocomposites derived from the MXene precursors.
电磁污染在人们的生活中引发了一系列问题，因此人们广泛期待具有轻质和宽吸收带宽特性的电磁吸收体。在这项工作中，从MXene-MOFs杂化物出发，合理设计并成功制备了新型三明治状二维层状Fe&TiO纳米颗粒@C纳米复合材料。由二维碳纳米片夹着的Fe和金红石型TiO纳米颗粒的形成，为电磁波吸收提供了强大的电磁能量衰减和良好的阻抗匹配。不出所料，该纳米复合材料在仅1.6毫米的厚度下实现了6.5吉赫兹的宽有效吸收带宽，在3毫米的厚度下于6.6吉赫兹处实现了-51.8分贝的最小反射损耗（RL）值。这项工作不仅为具有良好电磁波吸收性能的层状金属和功能纳米颗粒@C纳米复合材料提供了良好的设计和制造理念，也为制备源自MXene前驱体的各种二维纳米复合材料提供了重要指导。
