Fabrication of clay soil/CuFe(2)O(4) nanocomposite toward improving energy and shielding efficiency of buildings.
Fabrication of clay soil/CuFe(2)O(4) nanocomposite toward improving energy and shielding efficiency of buildings.
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DOI：
10.1038/s41598-021-00347-x
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发表时间：
2021-10-21
影响因子：
4.6
通讯作者：
Peymanfar R
中科院分区：
文献类型：
--
作者：
Keykavous-Amand S;Peymanfar R
本研究利用纳米CuFe2O4颗粒对实际建筑材料粘土砖的能量和屏蔽效率进行了研究。首先，使用溶胶-凝胶法制备纳米颗粒，然后将其作为客体负载到砖基质中。用X射线粉末衍射仪(XRD)、傅立叶变换红外光谱(FTIR)、漫反射光谱(DRS)、场发射扫描电子显微镜(FE-SEM)、高分辨电子显微镜(HRTEM)、振动样品磁强计(VSM)、差示扫描量热仪(DSC)和矢量网络分析仪(VNA)对样品进行了表征。使用红外温度计在红外源下监测定制样品的红外吸收。红外吸收和能带隙证明，将纳米颗粒插入砖介质中可以加速升温砖的生长，这是在寒冷气候下提高能效的理想选择。值得注意的是，砖/CuFe2O4纳米复合材料的强反射损耗(RL)为58.54Gb，有效带宽为4.22Ghz(RL >； 10TdB)，厚度为2.50Gm，同时仅通过10wt%的填充就屏蔽了X波段58%以上的电磁波。复合材料的微波吸收和屏蔽特性主要来源于导电损耗、电子跳跃、自然和交换共振、弛豫损耗、二次场以及涡流损耗。有趣的是，纳米复合材料的屏蔽性能是由其吸收特性显著产生的，减少了应用阻抗失配机制的屏蔽材料产生的二次电磁污染。
In this research, the energy and shielding efficiency of brick, fabricated by clay soil, as a practical building material was reinforced using CuFe2O4 nanoparticles. Initially, the nanoparticles were fabricated using the sol–gel method and then loaded in the brick matrix as a guest. The architected samples were characterized by X-ray powder diffraction (XRD), Fourier transform infrared (FTIR), diffuse reflection spectroscopy (DRS), field emission scanning electron microscopy (FE-SEM), High-resolution transmission electron microscopy (HRTEM), vibrating-sample magnetometer (VSM), differential scanning calorimetry (DSC) thermograms, and vector network analyzer (VNA) analyses. IR absorption of the tailored samples was monitored under an IR source using an IR thermometer. IR absorption and energy band gap attested that inserting the nanoparticles in brick medium led to the acceleration of a warming brick, desirable for energy efficiency in cold climates. It is worth noting that the brick/CuFe2O4 nanocomposite achieved a strong reflection loss (RL) of 58.54 dB and gained an efficient bandwidth as wide as 4.22 GHz (RL > 10 dB) with a thickness of 2.50 mm, meanwhile it shielded more than 58% of the electromagnetic waves at X-band by only a filler loading of 10 wt%. The microwave absorbing and shielding characteristics of the composite are mainly originated from conductive loss, electron hopping, natural and exchange resonance, relaxation loss, secondary fields, as well as eddy current loss. Interestingly, the shielding property of the nanocomposite was significantly generated from its absorbing features, reducing the secondary electromagnetic pollutions produced by the shielding materials applying the impedance mismatching mechanism.
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DOI：
10.1109/tmtt.2005.845194
发表时间：
2005-04-01
影响因子：
4.3
作者：
Esteban, J;Camacho-Peñalosà, C;Márquez-Segura, E
通讯作者：
Márquez-Segura, E
由碳纳米管/石墨烯气凝胶衍生的极其多孔的三维建筑纳米结构，具有超宽带电磁吸收功能
影响因子：
13.1
作者：
Lv, Hualiang;Li, Yang;Zhang, Rui
通讯作者：
Zhang, Rui
影响因子：
4.6
作者：
Mustaffa, Muhammad Syazwan;Azis, Raba'ah Syahidah;Ibrahim, Idza Riati
通讯作者：
Ibrahim, Idza Riati
影响因子：
4.6
作者：
Hussein MI;Jehangir SS;Rajmohan IJ;Haik Y;Abdulrehman T;Clément Q;Vukadinovic N
通讯作者：
Vukadinovic N
DOI：
10.1016/j.physa.2019.124127
发表时间：
2020-08-01
影响因子：
3.3
作者：
Ghazvini, Mahyar;Maddah, Heydar;Kumar, Ravinder
通讯作者：
Kumar, Ravinder