Article
Materials Science, Ceramics
Jiaxin Ma, Jiancheng Wang, Xiaobo Hu, Lianjun Wang, Yuchi Fan, Wan Jiang
Summary: A plate-like magnetic heterostructure with high imaginary permeability and superior impedance matching has been fabricated through nitridation. This novel microwave absorber exhibits significantly improved reflection loss and absorption bandwidth, providing a new path for designing high-performance microwave absorbers based on magnetic materials.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Characterization & Testing
Hengqian Jin, Shufei Wei, Xinping Zhang, Huarong Nie, Aihua He
Summary: This study successfully fabricated novel hydrophilic multi-heterostructure composites (Mag@J/MWCNT), which combined nanostructured Fe3O4 covered snowman-like Janus nano-particles (Mag@J) with MWCNTs to enhance microwave absorption. The composites demonstrated good hydrophilicity, low reflection loss (RL), strong absorption intensity (RL = -38.98 dB), wide bandwidth (6.04-8.23 GHz), and low thickness (3.5 mm). The excellent microwave absorption properties were attributed to the strong dielectric loss, magnetic loss, and good impedance matching of different components, as well as multiple reflection absorption of microwave in the Janus particle's hollow sphere.
Article
Engineering, Chemical
Zhaoxi Zhou, Wenjie Zhao, Zhuowei Zhao, Heqing Fu
Summary: A multidimensional core-shell-flat heterostructure is proposed to enhance microwave absorption with both dielectric loss and magnetic loss. The optimized impedance matching and interfacial polarization contribute to the improved absorption performance. Multiple interfacial scattering and enhanced interfacial polarization in the heterostructure lead to lower reflection loss and wider absorption bandwidth.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Engineering, Environmental
Chengjuan Wang, Haotian Jiang, Bowen Cui, Xiaodan Xu, Mengfan Li, Zhenhao Xu, Hongxue Tan, Deli Yang, Yanqiu Feng, Yanxiang Wang, Chengguo Wang
Summary: In this study, carbonaceous and magnetic materials were integrated to synthesize hybrid composites with distinctive heterostructures, which exhibit excellent performance in electromagnetic wave absorption. These composites possess beneficial characteristics, such as rich conductive networks, plentiful heterogeneous interfaces, appropriate defect polarization and dipole polarization, which make them promising for practical applications.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Hui Luo, Sihai Lv, Guizhen Liu, Yongzhi Cheng, Xujin Ge, Xian Wang, Rongzhou Gong, Fu Chen
Summary: Developing high-performance microwave absorbing materials remains a challenge in addressing electromagnetic pollution. This study focuses on interfacial engineering to enhance interfacial polarization, which plays a key role in microwave absorption. The researchers prepared multiple interfacial magnetic carbon nanotubes encapsulated hydrangea-like NiMo/MoC/N-doped carbon via carbothermic reduction. The phase structure and electromagnetic properties were regulated by varying the thermal treatment temperature. Dielectric loss mechanisms were analyzed using Debye relaxation theory. The composites exhibited excellent microwave absorption properties, achieving a reflection loss of less than -20 dB in the frequency range of 3.76-17.52 GHz. The highest reflection loss value of -70.1 dB was achieved at 14.2 GHz with an absorber thickness of only 1.52 mm at a thermal treatment temperature of 800°C. Computer simulation technology was used to analyze the radar cross section (RCS) reduction, with a reduction of 17.05 dBm2 observed at a scattering angle of 0. This work provides a novel approach for achieving multi-interface absorbers for high-performance microwave absorption.
Article
Chemistry, Physical
Zhao Lu, Yan Wang, Xiaochuang Di, Nian Wang, Runrun Cheng, Longqi Yang
Summary: In this study, a lightweight and flexible microwave absorbing material was developed by attaching RGO to CF to form a core-sheath structure and arranging LDH layers on the CF/RGO surface, effectively optimizing the absorption performance of the material.
Article
Chemistry, Physical
Mao Zhang, Xiang Qian, Qingwen Zeng, Yahui Zhang, Hui Cao, Renchao Che
Summary: Combining dielectric and magnetic components to develop functional materials with outstanding microwave absorption is a promising approach, though assembling multi components with suitable impedance matching remains challenging. Here, ternary PPy@Fe3O4/CNTs microspheres with hollow structure were successfully fabricated via a spray-dry method, enabling rational assembly of magnetic and dielectric components. The composite achieved excellent microwave absorption performance at 8.8 GHz, with a maximum reflection loss of -51.8 dB.
Article
Chemistry, Physical
Linqing Yue, Bo Zhong, Long Xia, Tao Zhang, Yuanlie Yu, Xiaoxiao Huang
Summary: This study successfully prepared a series of three-dimensional network-like structures formed by silicon-coated carbon nanotubes through an improved process, which play a significant role in enhancing the electromagnetic wave absorption performance and achieved good absorption effects.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Chemistry, Physical
Dawei Liu, Yunchen Du, Ping Xu, Fengyuan Wang, Yahui Wang, Liru Cui, Honghong Zhao, Xijiang Han
Summary: Hierarchical microstructures, specifically the double-hierarchical N-doped carbon nanotubes wrapping waxberry-like Ni@C microspheres, have been successfully designed and fabricated with optimal absorption characteristics in high-performance microwave absorbing materials. The unique architecture of NC@NCNTs provides stronger dipole orientation, interfacial polarization relaxation, conductive loss, and multiple reflection effects for incident electromagnetic waves, demonstrating superior performance compared to previous Ni/C composites.
JOURNAL OF MATERIALS CHEMISTRY A
(2021)
Article
Materials Science, Multidisciplinary
Yameng Jiao, Qiang Song, Xuemin Yin, Liyuan Han, Wei Li, Hejun Li
Summary: In this study, defect-rich bamboo-like carbon nanotubes (CNTs) were grown on carbon black (CB) to establish a developed multilevel conductive network and introduce abundant CB/CNTs nano-interfaces. The defects on CNTs provide moderate conductivity and good impedance matching for effective microwave absorption (MA). Moreover, the high-density defects on CNTs enhance the EMW loss ability by inducing dipole polarization.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Engineering, Environmental
Yu Wang, Zhongji Qu, Wei Wang, Hongfei Qian, Xiyu Song, Dan Yu
Summary: This study successfully fabricates a three-dimensional hybrid aerogel using multidimensional nanomaterials, which exhibits excellent microwave absorption performance and can be stably applied in complex environments.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Man He, Hao Chen, Hao Peng, Yuming Zhou, Zhaoping Song, Yongjuan Wang, Shuangjiang Feng, Xiaohai Bu
Summary: Ti3C2Tx MXene with high conductivity has potential in microwave absorption (MA), but impedance mismatch and limited attenuation performance need to be addressed. In this study, Ti3C2Tx MXene quantum dots (MQDs) were used for the first time in MA, combined with Na2Ti3O7 to form Na2Ti3O7/MQDs composites with 3D/0D heterostructure. The composites showed excellent MA performance due to enhanced interfacial polarization, optimized impedance matching, and increased electromagnetic wave reflections among nanowires in the chrysanthemumlike structure.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Fei Wang, Zhaohui Wang, Yuheng Li, Shengjing Guan, Shan Wei, Dong Liu, Xiuxia Meng
Summary: This study proposed a practical strategy for fabricating Ti3C2@CNTs composite in high-performance lithium-ion batteries and microwave absorbers. By grafting carbon nanotubes onto 3D hollow MXene, an urchin-like structure composite was formed, which can overcome the problem of interlayer stacking in MXene-based anodes and improve the electrochemical performance and microwave absorption performance of the composite.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Composites
Alessandra A. P. Gabino, Bluma G. Soares
Summary: The effect of combining carbon nanotubes (CNT) and graphene nanoplatelets (GNP) on the electromagnetic absorbing properties of polydimethylsiloxane (PDMS) composites was studied. The samples were prepared using a low-cost and scalable simple one-step blending approach. Experimental designs, specifically the Axial Simplex Centroid technique, were optimized for the number of experiments and sample compositions. Rheology, electric conductivity, and electromagnetic properties (such as absorptivity) were analyzed. CNT was found to be more effective than GNP in structuring the conductive network, and the hybrid filler composite with a 1:1 ratio (CNT/GNP = 0.67%:0.67%) showed the highest electric conductivity and best overall electromagnetic results.
POLYMER COMPOSITES
(2023)
Article
Environmental Sciences
Zhifeng Liu, Wei Zhang, Qinghua Liang, Jinhui Huang, Binbin Shao, Yang Liu, Yujie Liu, Qingyun He, Ting Wu, Jilai Gong, Ming Yan, Wangwang Tang
Summary: This study investigated the removal of methyl orange from aqueous solution using microwave-assisted catalytic oxidation technology. By loading CuFe2O4 on carbon nanotubes, the microwave adsorption performance was enhanced, achieving a removal rate of 97% in the best conditions. Various factors influencing the degradation of methyl orange were explored, with a detailed analysis of the degradation mechanism under different pH conditions.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)