A Facile Synthesis of Novel Amorphous TiO<sub>2</sub> Nanorods Decorated rGO Hybrid Composites with Wide Band Microwave Absorption
Amorphous structures may play important roles in achieving highly efficient microwave absorption performance due to the polarization losses induced by the disorders, vacancies and other functional groups existed in them. Herein, a kind of amorphous TiO<sub>2</sub>/rGO composite (a-TiO<...
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MDPI AG
2020-10-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/10/11/2141 |
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| author | Hao Zhang Yongpeng Zhao Xuan Yang Guolin Zhao Dongmei Zhang Hui Huang Shuaitao Yang Ningxuan Wen Muhammad Javid Zeng Fan Lujun Pan |
| author_facet | Hao Zhang Yongpeng Zhao Xuan Yang Guolin Zhao Dongmei Zhang Hui Huang Shuaitao Yang Ningxuan Wen Muhammad Javid Zeng Fan Lujun Pan |
| author_sort | Hao Zhang |
| collection | DOAJ |
| description | Amorphous structures may play important roles in achieving highly efficient microwave absorption performance due to the polarization losses induced by the disorders, vacancies and other functional groups existed in them. Herein, a kind of amorphous TiO<sub>2</sub>/rGO composite (a-TiO<sub>2</sub>/rGO) was successfully fabricated via a facile one-step solvothermal method. The complex permittivity of the composites can be regulated by adjusting the addition of precursor solution. The minimum reflection loss of a-TiO<sub>2</sub>/rGO composites reached −42.8 dB at 8.72 GHz with a thickness of 3.25 mm, and the widest efficient absorption bandwidth (EAB) was up to 6.2 GHz (11.8 to 18 GHz) with a thickness of only 2.15 mm, which achieved the full absorption in Ku band (12 to 18 GHz). Furthermore, the EAB was achieved ranging from 3.97 to 18 GHz by adjusting the thickness of the absorber, covering 87.7% of the whole radar frequency band. It is considered that the well-matched impedance, various polarization processes, capacitor-like structure and conductive networks all contributed to the excellent microwave absorption of a-TiO<sub>2</sub>/rGO. This study provides reference on constructing amorphous structures for future microwave absorber researches and the as-prepared a-TiO<sub>2</sub>/rGO composites also have great potential owing to its facile synthesis and highly efficient microwave absorption. |
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| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-10T15:18:23Z |
| publishDate | 2020-10-01 |
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| spelling | doaj.art-fa2b64010ddd4192af8d91139607dd802023-11-20T18:46:10ZengMDPI AGNanomaterials2079-49912020-10-011011214110.3390/nano10112141A Facile Synthesis of Novel Amorphous TiO<sub>2</sub> Nanorods Decorated rGO Hybrid Composites with Wide Band Microwave AbsorptionHao Zhang0Yongpeng Zhao1Xuan Yang2Guolin Zhao3Dongmei Zhang4Hui Huang5Shuaitao Yang6Ningxuan Wen7Muhammad Javid8Zeng Fan9Lujun Pan10School of Physics, Dalian University of Technology, Dalian 116024, ChinaSchool of Physics, Dalian University of Technology, Dalian 116024, ChinaSchool of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, ChinaSchool of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, ChinaSchool of Physics, Dalian University of Technology, Dalian 116024, ChinaSchool of Physics, Dalian University of Technology, Dalian 116024, ChinaSchool of Physics, Dalian University of Technology, Dalian 116024, ChinaSchool of Physics, Dalian University of Technology, Dalian 116024, ChinaSchool of Physics, Dalian University of Technology, Dalian 116024, ChinaSchool of Physics, Dalian University of Technology, Dalian 116024, ChinaSchool of Physics, Dalian University of Technology, Dalian 116024, ChinaAmorphous structures may play important roles in achieving highly efficient microwave absorption performance due to the polarization losses induced by the disorders, vacancies and other functional groups existed in them. Herein, a kind of amorphous TiO<sub>2</sub>/rGO composite (a-TiO<sub>2</sub>/rGO) was successfully fabricated via a facile one-step solvothermal method. The complex permittivity of the composites can be regulated by adjusting the addition of precursor solution. The minimum reflection loss of a-TiO<sub>2</sub>/rGO composites reached −42.8 dB at 8.72 GHz with a thickness of 3.25 mm, and the widest efficient absorption bandwidth (EAB) was up to 6.2 GHz (11.8 to 18 GHz) with a thickness of only 2.15 mm, which achieved the full absorption in Ku band (12 to 18 GHz). Furthermore, the EAB was achieved ranging from 3.97 to 18 GHz by adjusting the thickness of the absorber, covering 87.7% of the whole radar frequency band. It is considered that the well-matched impedance, various polarization processes, capacitor-like structure and conductive networks all contributed to the excellent microwave absorption of a-TiO<sub>2</sub>/rGO. This study provides reference on constructing amorphous structures for future microwave absorber researches and the as-prepared a-TiO<sub>2</sub>/rGO composites also have great potential owing to its facile synthesis and highly efficient microwave absorption.https://www.mdpi.com/2079-4991/10/11/2141amorphous TiO<sub>2</sub>rGOmicrowave absorptioncomplex permittivityimpedance matchingquarter-wavelength matching model |
| spellingShingle | Hao Zhang Yongpeng Zhao Xuan Yang Guolin Zhao Dongmei Zhang Hui Huang Shuaitao Yang Ningxuan Wen Muhammad Javid Zeng Fan Lujun Pan A Facile Synthesis of Novel Amorphous TiO<sub>2</sub> Nanorods Decorated rGO Hybrid Composites with Wide Band Microwave Absorption Nanomaterials amorphous TiO<sub>2</sub> rGO microwave absorption complex permittivity impedance matching quarter-wavelength matching model |
| title | A Facile Synthesis of Novel Amorphous TiO<sub>2</sub> Nanorods Decorated rGO Hybrid Composites with Wide Band Microwave Absorption |
| title_full | A Facile Synthesis of Novel Amorphous TiO<sub>2</sub> Nanorods Decorated rGO Hybrid Composites with Wide Band Microwave Absorption |
| title_fullStr | A Facile Synthesis of Novel Amorphous TiO<sub>2</sub> Nanorods Decorated rGO Hybrid Composites with Wide Band Microwave Absorption |
| title_full_unstemmed | A Facile Synthesis of Novel Amorphous TiO<sub>2</sub> Nanorods Decorated rGO Hybrid Composites with Wide Band Microwave Absorption |
| title_short | A Facile Synthesis of Novel Amorphous TiO<sub>2</sub> Nanorods Decorated rGO Hybrid Composites with Wide Band Microwave Absorption |
| title_sort | facile synthesis of novel amorphous tio sub 2 sub nanorods decorated rgo hybrid composites with wide band microwave absorption |
| topic | amorphous TiO<sub>2</sub> rGO microwave absorption complex permittivity impedance matching quarter-wavelength matching model |
| url | https://www.mdpi.com/2079-4991/10/11/2141 |
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