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Zhang M, Sun X, Cai X, Zhan X, Wu Y, Zhang X, Wu G, Wang X. Large Microsphere Structure of a Co/C Composite Derived from Co-MOF with Excellent Wideband Electromagnetic Microwave Absorption Performance. ACS APPLIED MATERIALS & INTERFACES 2023; 15:59681-59692. [PMID: 38086762 DOI: 10.1021/acsami.3c12986] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2023]
Abstract
In the field of electromagnetic wave (EMW) absorption, carbon matrix materials based on metal-organic frameworks (MOFs) have drawn more interest as a result of their outstanding advantages, such as porous structure, lightweight, controlled morphology, etc. However, how to broaden the effective absorption bandwidth [EAB; reflection loss (RL) ≤ -10 dB] is still a challenge. In this paper, large microsphere structures of a Co/C composite composed of small particle clusters were successfully prepared by the solvothermal method and annealing treatment. At a filling ratio of 40 wt %, the Co/C composite shows attractive microwave absorption (MA) performance after being annealed at 600 °C in an atmosphere of argon. With an EAB of 6.32 GHz (9.92-16.24 GHz) and a thickness of just 2.57 mm, the minimum RL can be attained at -54.55 dB. Most importantly, the EAB can attain 7.12 GHz (10.88-18.0 GHz) when the thickness is 2.38 mm, which is larger than that of the majority of MOF-derived composites. The superior MA performance is strongly related to excellent impedance matching and a higher attenuation constant. This study provides a simple strategy for synthesizing a MOF-derived Co/C composite with a wide EAB.
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Affiliation(s)
- Mengyi Zhang
- Qingdao Innovation and Development Base of Harbin Engineering University, Harbin Engineering University, Harbin, Heilongjiang 150001, People's Republic of China
| | - Xiaohui Sun
- Qingdao Innovation and Development Base of Harbin Engineering University, Harbin Engineering University, Harbin, Heilongjiang 150001, People's Republic of China
| | - Xudong Cai
- Science and Technology on Near-Surface Detection Laboratory, Wuxi, Jiangsu 214035, People's Republic of China
| | - Xiaolu Zhan
- Qingdao Innovation and Development Base of Harbin Engineering University, Harbin Engineering University, Harbin, Heilongjiang 150001, People's Republic of China
| | - Yufei Wu
- Qingdao Innovation and Development Base of Harbin Engineering University, Harbin Engineering University, Harbin, Heilongjiang 150001, People's Republic of China
| | - Xuyang Zhang
- Qingdao Innovation and Development Base of Harbin Engineering University, Harbin Engineering University, Harbin, Heilongjiang 150001, People's Republic of China
| | - Guohua Wu
- Qingdao Innovation and Development Base of Harbin Engineering University, Harbin Engineering University, Harbin, Heilongjiang 150001, People's Republic of China
- Key Laboratory of Functional Molecular Solids, Ministry of Education, Wuhu, Anhui 241002, People's Republic of China
| | - Xiangwei Wang
- Qingdao Innovation and Development Base of Harbin Engineering University, Harbin Engineering University, Harbin, Heilongjiang 150001, People's Republic of China
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Chu Z, Deng W, Xu J, Wang F, Zhang Z, Hu Q. Synthesis of RGO/Cu@ FeAl 2O 4 Composites and Its Applications in Electromagnetic Microwave Absorption Coatings. MATERIALS (BASEL, SWITZERLAND) 2023; 16:740. [PMID: 36676476 PMCID: PMC9860893 DOI: 10.3390/ma16020740] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Revised: 01/09/2023] [Accepted: 01/09/2023] [Indexed: 06/17/2023]
Abstract
In order to satisfy the requirements of wide frequency bands, the lightweight and strong absorption for the electromagnetic wave absorbing materials, a uniform mixture of FeAl2O4 with RGO/Cu (reduction graphene oxide, RGO) was obtained by the mechanical mixing method, and composite coating was obtained by plasma spraying. The addition of RGO/Cu into FeAl2O4 is conducive to improve the dielectric properties and the impedance matching performance of spinel. When the RGO/Cu composite powders are doped by 10 wt.%, the reflection loss at 15 GHz is -16 dB and the absorption bandwidth is 2 GHz, indicating that the composite material has potential application value in the field of high-frequency wave absorption. The research on the electromagnetic wave absorption mechanism shows that its superior wave absorption performance is determined by the synergistic effect of multiple loss mechanisms such as interfacial polarization, dipole relaxation, natural resonance, exchange resonance, and eddy current loss.
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Yu W, Min Y, Fang J, Lu X, Wang Z, Jian L. Polyimide-derived porous carbon/Co particle-based composites for high-performance microwave absorption. RSC Adv 2022; 12:29070-29077. [PMID: 36320773 PMCID: PMC9554940 DOI: 10.1039/d2ra04653a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Accepted: 09/16/2022] [Indexed: 11/07/2022] Open
Abstract
A simple method that combines liquid-liquid phase separation and high-temperature pyrolysis has been developed for the synthesis of polyimide-derived porous carbon/Co particle-based composite absorbers (PIC/Co-800 and PIC/Co-1000). The excellent heat resistance of polyimide allows the composite precursor to maintain its porous structure during pyrolysis. According to the results, PIC/Co-800 and PIC/Co-1000 have a coral-like porous structure, which can enhance the impedance matching property and microwave attenuation ability of the synthesized materials. The impedance matching condition and dissipation ability of PIC/Co-800 and PIC/Co-1000 have been enhanced due to the synergistic effect between the carbon-induced dielectric loss and Co nanoparticle-induced magnetic loss. PIC/Co-1000 shows the highest absorption performance with a minimum reflection loss (RL) of -40.22 dB at a thickness of 5.3 mm and an effective absorption bandwidth (EABW, RL ≤ -10 dB) of 4.10 GHz at a thickness of 1.4 mm. With thicknesses in the range of 1.4 mm to 5.3 mm, the minimum RL value of each thickness is lower than -15 dB. Therefore, this work provides a new strategy for the synthesis of promising absorbing materials with outstanding EMW absorption performance.
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Affiliation(s)
- Wentao Yu
- School of Materials and Energy, Guangdong University of Technology Guangzhou 510006 China
| | - Yonggang Min
- School of Materials and Energy, Guangdong University of Technology Guangzhou 510006 China
| | - Jiyong Fang
- School of Materials and Energy, Guangdong University of Technology Guangzhou 510006 China
| | - Xiaochuang Lu
- School of Materials and Energy, Guangdong University of Technology Guangzhou 510006 China
| | - Ziqing Wang
- School of Materials and Energy, Guangdong University of Technology Guangzhou 510006 China
| | - Lingfeng Jian
- School of Materials and Energy, Guangdong University of Technology Guangzhou 510006 China
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Huang W, Qiu Q, Yang X, Zuo S, Bai J, Zhang H, Pei K, Che R. Ultrahigh Density of Atomic CoFe-Electron Synergy in Noncontinuous Carbon Matrix for Highly Efficient Magnetic Wave Adsorption. NANO-MICRO LETTERS 2022; 14:96. [PMID: 35384519 PMCID: PMC8986902 DOI: 10.1007/s40820-022-00830-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Accepted: 02/28/2022] [Indexed: 05/19/2023]
Abstract
Improving the atom utilization of metals and clarifying the M-M' interaction is both greatly significant in assembling high-performance ultra-light electromagnetic wave-absorbing materials. Herein, a high-temperature explosion strategy has been successfully applied to assemble the hierarchical porous carbon sponge with Co-Fe decoration via the pyrolysis of the energetic metal organic framework. The as-constructed hybrid displays a superior reflection loss (RL) value of - 57.7 dB and a specific RL value of - 192 dB mg-1 mm-1 at 12.08 GHz with a layer thickness of 2.0 mm (loading of 15 wt%). The off-axis electron hologram characterizes the highly distributed numerous polarized nanodomain variable capacitors, demonstrating the dipole and interfacial polarization along the edges of the nanopores. More importantly, the X-ray absorption spectroscopy analysis verifies the mutual interaction between the metal cluster and carbon matrix and the electronic coupling responsible for the greatly improved electromagnetic wave absorption.
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Affiliation(s)
- Wenhuan Huang
- Key Laboratory of Chemical Additives for China National Light Industry, College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an 710021, People's Republic of China.
| | - Qiang Qiu
- Key Laboratory of Chemical Additives for China National Light Industry, College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an 710021, People's Republic of China
| | - Xiufang Yang
- Key Laboratory of Chemical Additives for China National Light Industry, College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an 710021, People's Republic of China
| | - Shouwei Zuo
- Key Laboratory of Chemical Additives for China National Light Industry, College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an 710021, People's Republic of China
| | - Jianan Bai
- Key Laboratory of Chemical Additives for China National Light Industry, College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an 710021, People's Republic of China
| | - Huabin Zhang
- KAUST Catalysis Center, King Abdullah University of Science and Technology, 23955-6900, Thuwal, Kingdom of Saudi Arabia.
| | - Ke Pei
- Laboratory of Advanced Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai, 200438, People's Republic of China
| | - Renchao Che
- Laboratory of Advanced Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai, 200438, People's Republic of China.
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Myrica Rubra-like MnFe2O4 Microsphere: A high efficiency microwave reduction catalyst for Cr(VI) removal from water. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2021.120434] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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PAN JUNJIE, TU WEIJUN, MA SHANHONG, Sun X, Zhao Q, QU HONGJIAO, Wang T, He J. Improvement of multiple attenuation characteristics of two-dimensional lamellar ferrocobalt@carbon nanocomposites as excellent electromagnetic wave absorber. Dalton Trans 2022; 51:9793-9802. [DOI: 10.1039/d2dt01503j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The lightweight carbon skeleton compounded with magnetic nanoparticles as excellent electromagnetic wave absorbers have attracted much attention considering their strong dielectric loss and magnetic loss, as well as the optimized...
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Wei S, Chen T, Shi Z, Chen S. Preparation of CoFe@N-doped C/rGO composites derived from CoFe Prussian blue analogues for efficient microwave absorption. J Colloid Interface Sci 2021; 610:395-406. [PMID: 34923277 DOI: 10.1016/j.jcis.2021.12.051] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Revised: 12/06/2021] [Accepted: 12/07/2021] [Indexed: 01/02/2023]
Abstract
At present, in order to solve the problem of microwave radiation and interference, it is urgent to study high performance microwave absorption (MA) materials with strong absorption ability, light weight, thin thickness and broad bandwidth. In this work, CoFe@nitrogen-doped carbon/rGO (CoFe@NC/rGO) composites derived from CoFe Prussian blue analogues were successfully prepared by in situ growth and annealing. And the effects of GO content on the MA performances of the composites were studied systematically. Results reveal that MA properties of CoFe@NC/rGO composites are enhanced by introduction of GO, this is mainly because the addition of GO can provide large specific surface area for microwave reflection, enhance interfacial polarization and compensate the insufficient dielectric loss. Moreover, impedance matching, conduction loss and attenuation ability are also improved obviously. CoFe@NC/rGO composites show outstanding MA capability, and the minimum reflection loss is up to -53.0 dB at a thickness of 2.4 mm, the largest effective absorption bandwidth can achieve 4.48 GHz at a thin thickness of 1.7 mm. In consideration of the superior MA performances, the CoFe@NC/rGO composites will be ideal candidates for high-efficient MA applications.
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Affiliation(s)
- Shuang Wei
- College of Materials Science and Engineering, Ocean University of China, Qingdao 266100, China
| | - Tao Chen
- College of Life Sciences, Qingdao University, Qingdao 266071, China
| | - Zhicheng Shi
- College of Materials Science and Engineering, Ocean University of China, Qingdao 266100, China.
| | - Shougang Chen
- College of Materials Science and Engineering, Ocean University of China, Qingdao 266100, China.
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Qin Y, Wang M, Gao W, Liang S. Rationally designed structure of mesoporous carbon hollow microspheres to acquire excellent microwave absorption performance. RSC Adv 2021; 11:14787-14795. [PMID: 35423987 PMCID: PMC8698231 DOI: 10.1039/d1ra00465d] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Accepted: 03/25/2021] [Indexed: 02/01/2023] Open
Abstract
In this study, we used a novel and facile hard-template etching method to manufacture mesoporous carbon hollow microspheres (MCHMs). We prove that the dielectric ability and microwave absorption of MCHMs can be adjusted by structural characteristics. When the average particle size of MCHMs is 452 nm, the paraffin composite material mixed with 10 wt% MCHMs can achieve a maximum reflection loss value of -51 dB with a thickness of 4.0 mm at 7.59 GHz. When the average particle size of MCHMs is 425 nm, the effective absorption bandwidth of the paraffin composite material mixed with 10 wt% MCHMs can achieve a broad bandwidth of 7.14 GHz with a thickness of 2.5 mm. Compared with other microwave absorbers, MCHMs possess high microwave absorption capacity and broad microwave absorption bandwidth with as low as a 10 wt% filler ratio. This excellent microwave absorption performance is due to the internal cavity and the mesoporous shell of MCHMs. By rationally designing the structure of MCHMs, excellent microwave absorption performance can be acquired. Meanwhile, this design concept based on a rational design of spherical structure can be extended to other spherical absorbers.
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Affiliation(s)
- Yuxuan Qin
- School of Resources, Environment and Materials, Guangxi University Nanning 530000 Guangxi China
| | - Muqun Wang
- School of Resources, Environment and Materials, Guangxi University Nanning 530000 Guangxi China
| | - Wei Gao
- School of Resources, Environment and Materials, Guangxi University Nanning 530000 Guangxi China
- Guangxi Engineering and Technology Research Center for High Quality Structural Panels from Biomass Wastes Nanning 530000 Guangxi China
| | - Shaofeng Liang
- School of Resources, Environment and Materials, Guangxi University Nanning 530000 Guangxi China
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Shu R, Zhang J, Wu Y, Wan Z, Li X. Synthesis of nitrogen-doped reduced graphene oxide/cobalt-zinc ferrite composite aerogels with superior compression recovery and electromagnetic wave absorption performance. NANOSCALE 2021; 13:4485-4495. [PMID: 33599652 DOI: 10.1039/d0nr08777g] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Graphene aerogels possessing a three-dimensional (3D) porous netlike structure, good electrical conductivity and ultralow density have been widely regarded as a promising candidate for high-efficiency electromagnetic wave (EMW) absorption. Herein, nitrogen-doped reduced graphene oxide/cobalt-zinc ferrite (NRGO/Co0.5Zn0.5Fe2O4) composite aerogels were synthesized through a solvothermal and subsequent hydrothermal self-assembly two-step method. The results of micromorphology analysis showed that the 3D networks were well constructed through the partial stacking of adjacent NRGO sheets, which were decorated with numerous Co0.5Zn0.5Fe2O4 microspheres. The as-synthesized NRGO/Co0.5Zn0.5Fe2O4 composite aerogels have a very low density (12.1-14.6 mg cm-3) and good compression recovery. Moreover, excellent EMW absorption performance could be achieved through facilely regulating the additive volume of ethylenediamine (i.e. nitrogen doping contents) and filler contents. Impressively, the composite aerogel with a doped nitrogen content of 2.5 wt% displayed the optimal minimum reflection loss (RLmin) of -66.8 dB in the X-band at a thickness of 2.6 mm and the broadest effective absorption bandwidth of 5.0 GHz under an ultrathin thickness of merely 1.6 mm. Meanwhile, the RLmin of NRGO/Co0.5Zn0.5Fe2O4 composite aerogels below -20 dB could be reached in almost the whole tested thickness range (1.4-5.0 mm). Additionally, the potential EMW absorption mechanisms were revealed, which was mainly due to the unique 3D porous netlike structure, synergistic effects among conduction loss, magnetic resonance loss and polarization loss, as well as the balanced attenuation capacity and impedance matching. It was believed that this work provided an alternative way for fabricating strong mechanical graphene-based 3D magnetic/dielectric composites as light-weight and high-efficiency EMW absorbers.
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Affiliation(s)
- Ruiwen Shu
- State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines, Anhui University of Science and Technology, Huainan 232001, People's Republic of China. and School of Chemical Engineering, Anhui University of Science and Technology, Huainan 232001, People's Republic of China and Institute of Environment-friendly Materials and Occupational Health of Anhui University of Science and Technology (Wuhu), Wuhu, 241003, People's Republic of China
| | - Jiabin Zhang
- School of Chemical Engineering, Anhui University of Science and Technology, Huainan 232001, People's Republic of China
| | - Yue Wu
- School of Chemical Engineering, Anhui University of Science and Technology, Huainan 232001, People's Republic of China
| | - Zongli Wan
- School of Chemical Engineering, Anhui University of Science and Technology, Huainan 232001, People's Republic of China
| | - Xiaohui Li
- School of Chemical Engineering, Anhui University of Science and Technology, Huainan 232001, People's Republic of China
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Ma Y, Quan B, Zeng Z, Zhang Y, Zhang L, Wang Y, Huang X. Multiple interface-induced evolution of electromagnetic patterns for efficient microwave absorption at low thickness. Inorg Chem Front 2021. [DOI: 10.1039/d0qi01486a] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Mo-Ni2P/rGO composites with heterojunction structures were successfully prepared by phosphating NiMoO4/rGO precursors at a specific temperature, which exhibit excellent microwave absorption performances at low thickness.
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Affiliation(s)
- Yabin Ma
- Institute of Advanced Materials and Flexible Electronics (IAMFE)
- School of Chemistry and Materials Science
- Nanjing University of Information Science & Technology
- Nanjing 210044
- China
| | - Bin Quan
- Institute of Advanced Materials and Flexible Electronics (IAMFE)
- School of Chemistry and Materials Science
- Nanjing University of Information Science & Technology
- Nanjing 210044
- China
| | - Zhihui Zeng
- Empa
- Swiss Federal Laboratories for Materials Science and Technology
- Dübendorf 8600
- Switzerland
| | - Yunke Zhang
- Institute of Advanced Materials and Flexible Electronics (IAMFE)
- School of Chemistry and Materials Science
- Nanjing University of Information Science & Technology
- Nanjing 210044
- China
| | - Lan Zhang
- Institute of Advanced Materials and Flexible Electronics (IAMFE)
- School of Chemistry and Materials Science
- Nanjing University of Information Science & Technology
- Nanjing 210044
- China
| | - Yu Wang
- Institute of Advanced Materials and Flexible Electronics (IAMFE)
- School of Chemistry and Materials Science
- Nanjing University of Information Science & Technology
- Nanjing 210044
- China
| | - Xiaogu Huang
- Institute of Advanced Materials and Flexible Electronics (IAMFE)
- School of Chemistry and Materials Science
- Nanjing University of Information Science & Technology
- Nanjing 210044
- China
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