1
|
Shu Y, Zhao T, Jia W, Yang L, Li X, Feng G, Li Y, Luo F. A crosslinked coral-like Co@CoO/RGO nanohybrid structure with good electromagnetic wave absorption performance. J Colloid Interface Sci 2023; 642:393-407. [PMID: 37023512 DOI: 10.1016/j.jcis.2023.03.183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2023] [Revised: 03/23/2023] [Accepted: 03/28/2023] [Indexed: 04/03/2023]
Abstract
The combination of magnetic and dielectric materials followed by appropriate structure design is an effective approach to achieve high electromagnetic wave absorption properties. Here, crosslinked Co@CoO/reduced graphene oxide nanohybrids (CCRGO) were fabricated via a simple three-step method. The experimental results show that compared with previous works, the as-prepared CCRGO nanohybrids achieve higher electromagnetic wave absorption and broader effective bandwidth at a lower filler loading. The electromagnetic parameters and electromagnetic wave absorption performance could be apparently adjusted by controlling the adding content of graphene oxide (GO) and the reduction temperature. Among a series of samples, CCRGO3-650 nanohybrid yields the best electromagnetic wave absorption performance benefiting from the proper GO addition and reduction temperature. At a filler loading of 20 wt%, the maximal reflection loss reaches to -64.67 dB at a thickness of 2.53 mm and the effective bandwidth below -10 dB covers the whole X band at a thickness of 2.51 mm. The good performance may be ascribed to the advantages of the dielectric and magnetic component as well as the special crosslinked structure, which triggers a synergistic absorption mechanism including multiple reflection/scattering, interface polarization, dipole polarization, conductive loss, eddy current loss, exchange resonance in the electromagnetic wave dissipation process. The good electromagnetic wave absorption performance affirms the potential application of CCRGO nanohybrids in the field of stealth materials.
Collapse
Affiliation(s)
- Yuan Shu
- NPU-NCP Joint International Research Center on Advanced Nanomaterials & Defects Engineering, Shaanxi Engineering Laboratory for Graphene New Carbon Materials and Applications, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, China
| | - Tingkai Zhao
- NPU-NCP Joint International Research Center on Advanced Nanomaterials & Defects Engineering, Shaanxi Engineering Laboratory for Graphene New Carbon Materials and Applications, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, China.
| | - Weiyu Jia
- NPU-NCP Joint International Research Center on Advanced Nanomaterials & Defects Engineering, Shaanxi Engineering Laboratory for Graphene New Carbon Materials and Applications, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, China
| | - Lei Yang
- NPU-NCP Joint International Research Center on Advanced Nanomaterials & Defects Engineering, Shaanxi Engineering Laboratory for Graphene New Carbon Materials and Applications, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, China
| | - Xianghong Li
- NPU-NCP Joint International Research Center on Advanced Nanomaterials & Defects Engineering, Shaanxi Engineering Laboratory for Graphene New Carbon Materials and Applications, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, China
| | - Guyue Feng
- NPU-NCP Joint International Research Center on Advanced Nanomaterials & Defects Engineering, Shaanxi Engineering Laboratory for Graphene New Carbon Materials and Applications, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, China
| | - Yatao Li
- NPU-NCP Joint International Research Center on Advanced Nanomaterials & Defects Engineering, Shaanxi Engineering Laboratory for Graphene New Carbon Materials and Applications, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, China
| | - Fa Luo
- NPU-NCP Joint International Research Center on Advanced Nanomaterials & Defects Engineering, Shaanxi Engineering Laboratory for Graphene New Carbon Materials and Applications, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, China
| |
Collapse
|
2
|
Peymanfar R, Moradi F. Functionalized carbon microfibers (biomass-derived) ornamented by Bi 2S 3 nanoparticles: an investigation on their microwave, magnetic, and optical characteristics. NANOTECHNOLOGY 2021; 32:065201. [PMID: 33080576 DOI: 10.1088/1361-6528/abc2ec] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The biomass-derived materials emerged as novel, low-cost, green, and light-weight microwave absorbers. On the other hand, the sulfide nanostructures due to narrow band gap demonstrated significant dielectric features. In this research, the pure carbon microfibers were prepared using Erodium cicutarium harvest and they were functionalized by a sonochemistry method. The treated microfibers were coated by Bi2S3 nanoparticles, obtained by a novel modified solvothermal route. X-ray powder diffraction, Fourier transform infrared, diffuse reflection spectroscopy, field emission scanning electron microscopy (FE-SEM), transmission electron microscopy, and vector network analyzer analyses were applied to characterize the features of the prepared structures. The obtained results manifest that the anchoring nanoparticles onto the functionalized microfibers narrowed band gap to 1.35 eV and reinforced polarizability of the nanocomposite, desirable for dielectric attenuation. In this study, the interfacial interactions were modulated using polyacrylonitrile (PAN) and polyvinylidene fluoride. Interestingly, FCMF blended in PAN demonstrated an eye-catching efficient bandwidth as wide as 8.13 GHz (RL > 10 dB) with only 2.00 mm in thickness, whereas it illustrated an outstanding reflection loss of 81.96 at 11.48 GHz with a thickness of 2.50 mm. More significantly, FCMF/Bi2S3/PAN nanocomposite promoted the efficient bandwidth to 3.07 GHz (RL > 20 dB). Noteworthy, all of the samples illustrated total electromagnetic interference shielding effectiveness (SET) more than 15 dB entire the x and ku-band frequency.
Collapse
Affiliation(s)
- Reza Peymanfar
- Department of Chemical Engineering, Energy Institute of Higher Education, Saveh, Iran
| | - Fereshteh Moradi
- Department of Chemical Engineering, Energy Institute of Higher Education, Saveh, Iran
| |
Collapse
|
3
|
Peymanfar R, Ghorbanian-Gezaforodi S. Preparation of graphite-like carbon nitride (g-C 3N 4)/NiCo 2S 4 nanocomposite toward salient microwave characteristics and evaluation of medium influence on its microwave features. NANOTECHNOLOGY 2020; 31:495202. [PMID: 32990262 DOI: 10.1088/1361-6528/abb2c0] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
In this paper, NiCo2S4 sulphide spinel nanoparticles are prepared using a modified solvothermal route, after which the obtained siegenite nanoparticles are tailored on graphite-like carbon nitride (g-C3N4) nanosheets. The morphology of tailored nanostructures is accomplished via an ion exchange process. Interestingly, the g-C3N4 stick structures are fabricated based on an innovative approach. Moreover, interfacial polarizations at heterojunction interfaces, and medium effects on microwave characteristics are examined, using polystyrene (PS) and polyvinylidene fluoride (PVDF) as polymeric matrices. The specimens are characterized via Fourier transform infrared (FTIR), X-ray powder diffraction (XRD), field emission scanning electron microscopy (FE-SEM), and transmission electron microscopy (TEM) analyses. The optical performance of nanostructures is studied by means of diffuse reflection spectroscopy (DRS) analysis, and is suggestive of a narrow band gap for NiCo2S4 and NiCo2S4/g-C3N4 nanostructures. Finally, the material's microwave absorbing features are clarified using a vector network analyzer (VNA) instrument via a wave guide technique. The resulting significant microwave absorptions reveal that our g-C3N4/NiCo2S4/PVDF 40% nanocomposite exhibited seven notches of reflection loss (RL), more than 30 dB in its curve, at 1.75 mm in thickness, while its maximum RL was 59.39 dB at 13.07 GHz. Interestingly, this composite, in a mass fraction of 60%, illustrates an efficient bandwidth of 5.1 GHz (RL > 10 dB) at only 1 mm thickness. It is worth noting that the maximum RL of g-C3N4 stick structures/PVDF measures 74.53 dB at 14.86 GHz, with a broadband efficient bandwidth of 7.96 GHz (RL > 10 dB). More significantly, both g-C3N4/NiCo2S4/PVDF and NiCo2S4/PVDF demonstrated salient electromagnetic interference shielding effectiveness (SE) > 30 dB across both x- and ku-band frequencies.
Collapse
Affiliation(s)
- Reza Peymanfar
- Department of Chemical Engineering, Energy Institute of Higher Education, Saveh, Iran
| | | |
Collapse
|
4
|
He H, Zheng H, Ma M, Shi Y, Gao Z, Chen S, Wang X. Peripheral groups of polyhedral oligomeric silsesquioxane (POSS) core-based dendrimers: a crucial factor for higher-level supra-architecture building. NANOSCALE 2020; 12:12146-12153. [PMID: 32490499 DOI: 10.1039/d0nr03216f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The role of peripheral groups (PGs) on dendrimers in the spontaneous higher-level organization of hierarchically assembled nanofibers was investigated in a series of POSS-based dendritic gelators (POSS-Lys-X, X: -Boc, -Cbz, -Fmoc, etc.). We demonstrate that the PGs not only affect the gelation ability in solutions, but also the construction of orderly entangled fibrous supramolecular networks, e.g., "loofah-like" networks. Attributed to the PGs (especially the -Boc group) causing a lower cooperative assembly, the steady state with the lowest potential energy of gelators can be easily achieved by the higher ordering of nanofiber entanglement into superstructures. The -Boc group-containing dendrimers show low molar enthalpy and molar entropy of gelation, which help the construction of unique three-dimensional (3D) "loofah-like" superstructures. In contrast, the high cooperative assembly of the dendrimer (-Cbz as the PG) promotes the gelator into a higher enthalpy gelation process, with a constructed normal fibrous network. Hence, the PGs of POSS-based dendrimers act as the crucial factor in controlling the hierarchical self-assembly via a thermodynamics approach. This research presents new perspectives to explicate the relationships between PGs of dendrimers, supra-architectures and gel performances, which further guide the design of functional supramolecular materials via controllable self-assembly.
Collapse
Affiliation(s)
- Huiwen He
- College of Materials Science and Engineering, Zhejiang University of Technology, 18 Chaowang Road, Hangzhou 310014, China. and College of mechanical Engineering, Zhejiang University of Technology, 288 Liuhe Road, Hangzhou 310000, China
| | - Hao Zheng
- College of Materials Science and Engineering, Zhejiang University of Technology, 18 Chaowang Road, Hangzhou 310014, China.
| | - Meng Ma
- College of Materials Science and Engineering, Zhejiang University of Technology, 18 Chaowang Road, Hangzhou 310014, China.
| | - Yanqing Shi
- College of Materials Science and Engineering, Zhejiang University of Technology, 18 Chaowang Road, Hangzhou 310014, China.
| | - Zengliang Gao
- College of mechanical Engineering, Zhejiang University of Technology, 288 Liuhe Road, Hangzhou 310000, China
| | - Si Chen
- College of Materials Science and Engineering, Zhejiang University of Technology, 18 Chaowang Road, Hangzhou 310014, China.
| | - Xu Wang
- College of Materials Science and Engineering, Zhejiang University of Technology, 18 Chaowang Road, Hangzhou 310014, China.
| |
Collapse
|
5
|
Gao N, Li WP, Wang WS, Liu DP, Cui YM, Guo L, Wang GS. Balancing Dielectric Loss and Magnetic Loss in Fe-NiS 2/NiS/PVDF Composites toward Strong Microwave Reflection Loss. ACS APPLIED MATERIALS & INTERFACES 2020; 12:14416-14424. [PMID: 32125144 DOI: 10.1021/acsami.9b23379] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Lightweight, broad-band, and highly efficient microwave-absorbing materials (MAMs) with tunable electromagnetic properties are in high demand. However, the absorption properties are limited by the simple loss mechanism in commonly used absorbing materials. Here, we tested the microwave-absorbing properties of Fe-NiS2/NiS/poly(vinylidene fluoride) (PVDF) in the frequency range of 2-18 GHz. For the 2.5% Fe-NiS2/NiS/PVDF with the filling content of 20 wt %, the maximum reflection loss can reach -61.72 dB at 14.88 GHz, and the bandwidth can reach 3.8 GHz with the reflection loss value below -10 dB. Loss mechanisms of different composites were analyzed on the basis of their magnetic and dielectric properties using both experimental and computational methods. The results indicate that strong microwave absorption property is achieved through a balancing of dielectric loss and magnetic loss. These findings present a new strategy for the future design of MAMs.
Collapse
Affiliation(s)
- Na Gao
- School of Chemistry, Beihang University, Beijing 100191, P. R. China
- School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191, P. R. China
| | - Wen-Ping Li
- School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191, P. R. China
| | - Wen-Shou Wang
- National Engineering Research Center for Colloidal Materials, Shandong University, Ji'nan 250100, P. R. China
| | - Da-Peng Liu
- School of Chemistry, Beihang University, Beijing 100191, P. R. China
| | - Yi-Min Cui
- School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191, P. R. China
| | - Lin Guo
- School of Chemistry, Beihang University, Beijing 100191, P. R. China
| | - Guang-Sheng Wang
- School of Chemistry, Beihang University, Beijing 100191, P. R. China
| |
Collapse
|
6
|
Peymanfar R, Karimi J, Fallahi R. Novel, promising, and broadband microwave‐absorbing nanocomposite based on the graphite‐like carbon nitride/CuS. J Appl Polym Sci 2019. [DOI: 10.1002/app.48430] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Reza Peymanfar
- Young Researchers and Elite Club, Science and Research BranchIslamic Azad University Tehran Iran
| | - Javad Karimi
- Department of Chemical EngineeringEnergy Institute of Higher Education Saveh Iran
| | - Reza Fallahi
- Department of Chemical EngineeringEnergy Institute of Higher Education Saveh Iran
| |
Collapse
|
7
|
Zhao S, Wang C, Su T, Zhong B. One-step hydrothermal synthesis of Ni–Fe–P/graphene nanosheet composites with excellent electromagnetic wave absorption properties. RSC Adv 2019; 9:5570-5581. [PMID: 35515896 PMCID: PMC9060898 DOI: 10.1039/c9ra00085b] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2019] [Accepted: 02/07/2019] [Indexed: 11/25/2022] Open
Abstract
Ni–Fe–P nanoparticles/graphene nanosheet (Ni–Fe–P/GNs) composites were successfully synthesized by a simple one-step hydrothermal method. Specifically, Ni2+ and Fe2+ were reduced by using milder sodium hypophosphite as a reducing agent in aqueous solution. SEM and TEM images show that a large number of Ni–Fe–P nanoscale microspheres are uniformly deposited on graphene nanosheets (GNs). At the thickness of 3.9 mm, the minimum reflection loss (RL) of Ni–Fe–P/GNs reaches −50.5 dB at 5.3 GHz. In addition, Ni–Fe–P/GNs exhibit a maximum absorption bandwidth of 5.0 GHz (13.0–18.0 GHz) at the thickness of 1.6 mm. The significant electromagnetic absorption characteristics of the Ni–Fe–P/GN composites can be attributed to the addition of magnetic particles to tune the dielectric properties of graphene to achieve good impedance matching. Therefore, Ni–Fe–P/GN is expected to be an attractive candidate for an electromagnetic wave absorber. Ni–Fe–P nanoparticle/graphene nanosheet composites synthesized by a one-step hydrothermal method have excellent performance in the field of electromagnetic wave absorption, with a minimum reflection loss of −50.5 dB and a maximum effective absorption bandwidth of 5 GHz.![]()
Collapse
Affiliation(s)
- Shuo Zhao
- School of Materials Science and Engineering
- Harbin Institute of Technology at Weihai
- Weihai 264209
- People's Republic of China
| | - Chunyu Wang
- School of Materials Science and Engineering
- Harbin Institute of Technology at Weihai
- Weihai 264209
- People's Republic of China
| | - Ting Su
- Green Chemistry Centre
- Collaborative Innovation Center for Light Hydrocarbon Resources
- College of Chemistry and Chemical Engineering
- Yantai University
- Yantai
| | - Bo Zhong
- School of Materials Science and Engineering
- Harbin Institute of Technology at Weihai
- Weihai 264209
- People's Republic of China
| |
Collapse
|