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Nanomaterials
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Advanced Electromagnetic Applications of Nanostructures and Their Composites
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Advanced Electromagnetic Applications of Nanostructures and Their Composites

A special issue of Nanomaterials (ISSN 2079-4991). This special issue belongs to the section "Energy and Catalysis".

Deadline for manuscript submissions: 10 September 2024 | Viewed by 1720

Special Issue Editors

Dr. Yan Cheng

E-Mail Website
Guest Editor
School of Materials Science&Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China
Interests: carbon materials; nanostructured materials; microwave absorption
Dr. Huanqin Zhao

E-Mail Website
Guest Editor
School of Materials Science and Chemical Engineering, Xi'an Technological University, Xi'an 710021, China
Interests: biomass-derived materials; nanocomposites; microwave absorption

Special Issue Information

Dear Colleagues,

Electromagnetic absorption materials have exhibited promising and significant applications in future technology. An eligible absorber on electronic apparatus can avoid the interference issue from external tanglesome electromagnetic waves. Additionally, it can protect human being’s healthy from electromagnetic radiation. The absorber coating on military equipments help it achieve stealth movement from electromagnetic wave detection. Thus, high-performance microwave absorbers are highly desired for the function achievements. Nanostructure materials present novel dielectric and magnetic specialties compared with bulk counterparts, which endow absorber with wide effective absorption bandwidth and strong reflection loss intensity. Further, integrating nanostructured dielectric materials with magnetic materials bring this nanocomposites with multi-loss mechanism like magnetic-dielectric synergetic loss, interfacial polarization relaxation. The boosted impedance matching behavior and attenuated ability than single type contributes to more electromagnetic waves incidence and subsequent dissipation process, acquiring a wider effective absorption bandwidth of this most important point.

This Special Issue focus on the latest advanced electromagnetic composites of nanostructure with highly efficient microwave absorption capabilities. Any type of dielectric-magnetic nanocomposites including preparation, characterization, performance analysis and mechanism revelation are permissible. On this basis, nanostructure design of composites with excellent absorption properties would be preferred.

Dr. Yan Cheng
Dr. Huanqin Zhao
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Nanomaterials is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2900 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • microwave absorption
  • electromagnetic shielding
  • nanocomposites
  • carbon materials
  • magnetic materials
  • nanostructure design, impedance matching

Published Papers (2 papers)

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12 pages, 3985 KiB  
Article
Lightweight Co3O4/CC Composites with High Microwave Absorption Performance
by Bing An, Mei Wu, Xinhuang Yang, Zengming Man, Chunyang Feng and Xiaohui Liang
Nanomaterials 2023, 13(13), 1903; https://doi.org/10.3390/nano13131903 - 21 Jun 2023
Cited by 2 | Viewed by 862
Abstract
With the rapid development of electronic and communication technology for military radars, the demand for microwave-absorbing materials in the low-frequency range with thin layers is growing. In this study, flexible Co3O4/CC (carbon cloth) composites derived from Co-MOFs (metal–organic frameworks) [...] Read more.
With the rapid development of electronic and communication technology for military radars, the demand for microwave-absorbing materials in the low-frequency range with thin layers is growing. In this study, flexible Co3O4/CC (carbon cloth) composites derived from Co-MOFs (metal–organic frameworks) and CC are prepared using hydrothermal and thermal treatment processes. The flexible precursors of the Co-MOFs/CC samples are calcined with different calcination temperatures, for which the material structure, dielectric properties, and microwave absorption performance are changed. With the increases in calcination temperature, the minimum reflection loss of the corresponding Co3O4/CC composites gradually moves to the lower frequency with a thinner thickness. In addition, the Co3O4/CC composites with the 25 wt% filler loading ratio exhibit the minimum reflection loss (RL) of −46.59 dB at 6.24 GHz with a 4.2 mm thickness. When the thickness is 3.70 mm, the effective absorption bandwidth is 3.04 GHz from 5.84 to 8.88 GHz. This study not only proves that the Co3O4/CC composite is an outstanding microwave-absorbing material with better flexibility but also provides useful inspiration for research on wideband microwave absorption materials below 10 GHz. Full article
(This article belongs to the Special Issue Advanced Electromagnetic Applications of Nanostructures and Their Composites)
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13 pages, 3076 KiB  
Article
One-Step Hydrothermal Synthesis of Cu2ZnSnS4 Nanoparticles as an Efficient Visible Light Photocatalyst for the Degradation of Congo Red Azo Dye
by Rodrigo Henríquez, Paula Salazar Nogales, Paula Grez Moreno, Eduardo Muñoz Cartagena, Patricio Leyton Bongiorno, Elena Navarrete-Astorga and Enrique A. Dalchiele
Nanomaterials 2023, 13(11), 1731; https://doi.org/10.3390/nano13111731 - 25 May 2023
Cited by 2 | Viewed by 1722
Abstract
A hydrothermal method was successfully employed to synthesize kesterite Cu2ZnSnS4 (CZTS) nanoparticles. X-ray diffraction (XRD), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), field-emission scanning electron microscopy (FE-SEM), energy-dispersive X-ray spectroscopy (EDS), transmission electron microscopy (TEM), and optical ultraviolet-visible (UV-vis) spectroscopy were [...] Read more.
A hydrothermal method was successfully employed to synthesize kesterite Cu2ZnSnS4 (CZTS) nanoparticles. X-ray diffraction (XRD), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), field-emission scanning electron microscopy (FE-SEM), energy-dispersive X-ray spectroscopy (EDS), transmission electron microscopy (TEM), and optical ultraviolet-visible (UV-vis) spectroscopy were used for characterization of structural, chemical, morphological, and optical properties. XRD results confirmed that a nanocrystalline CZTS phase corresponding to the kesterite structure was formed. Raman analysis confirmed the existence of single pure phase CZTS. XPS results revealed the oxidation states as Cu+, Zn2+, Sn4+, and S2−. FESEM and TEM micrograph images revealed the presence of nanoparticles with average sizes between 7 nm to 60 nm. The synthesized CZTS nanoparticles bandgap was found to be 1.5 eV which is optimal for solar photocatalytic degradation applications. The properties as a semiconductor material were evaluated through the Mott–Schottky analysis. The photocatalytic activity of CZTS has been investigated through photodegradation of Congo red azo dye solution under solar simulation light irradiation, proving to be an excellent photo-catalyst for CR where 90.2% degradation could be achieved in just 60 min. Furthermore, the prepared CZTS was reusable and can be repeatedly used to remove Congo red dye from aqueous solutions. Full article
(This article belongs to the Special Issue Advanced Electromagnetic Applications of Nanostructures and Their Composites)
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