Special Issue "Layered Double Hydroxides: Nanoparticles, Hybrids and Nanocomposites"

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Nanotechnology and Applied Nanosciences".

Deadline for manuscript submissions: closed (31 December 2019).

Special Issue Editors

Prof. Dr. José Ignacio Velasco
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Guest Editor
Universitat Politecnica de Catalunya, Centre Català del Plàstic, Barcelona, Spain
Interests: polymers; composites; foams; nanocomposites
Special Issues and Collections in MDPI journals
Dr. Vera Realinho
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Guest Editor
Department of Materials Science and Engineering; School of Industrial, Aerospace and Audiovisual Engineering (ESEIAAT); Universitat Politècnica de Catalunya (UPC BarcelonaTech); Terrassa Campus, Building TR5. C. Colom 11, E-08222 Terrassa, Barcelona, Spain
Interests: polymer clay nanocomposites; nanocomposite foams; multifunctional materials; flame retardancy of polymers
Special Issues and Collections in MDPI journals

Special Issue Information

Dear Colleagues,

This Special Issue focuses on the current state-of-the-art of the Layered Double Hydroxides, both from the points of view of its synthesis and characterization, as well as the development of hybrid and nanocomposite materials and their applications.

Layered double hydroxides (LDHs) or anionic clays can be seen as layered compounds with the brucite layer structure, which are derived from hydroxides of divalent cations by oxidation or cation replacement so that they produce an excess of positive electric charge, and the intercalation of extra anions between the hydroxide layers that neutralize that charge. LDHs can be formed with a wide variety of anions in the intercalated layers.

Layered double hydroxides (LDH), due to their unique properties as anion exchangers and their compositional versatility, among other factors, have attracted a great deal of attention in various technologically important fields, such as catalysis, separation, biomedicine, pharmacy, cosmetics, environment, etc. Recently, significant advances have been made in the synthesis of LDH with new compositions and morphologies that allow improved applications in these fields.

The compositional variation, either in layers or in interlayer anions, leads to a functional diversity that allows LDH to be used in a broad range of applications such as waste water treatment, ion exchanger, halogen free flame retardant, antacids, stabilizers for polymers, pharmaceuticals and agricultural goods, electro-photoactive materials, catalysts/catalyst precursors, etc. Among them, antimicrobial activity is one of the most promising applications of LDH, due to its high biocompatibility, high chemical stability, and ability to control the release of molecules.

Due to its laminar morphology and highly adjustable properties, LDH is an emerging class of materials for the preparation of multifunctional polymeric nanocomposites, which can exhibit unusual sets of properties, including high thermomechanical strength, barrier properties, flame retardancy, and ionic conduction, among others, while maintaining the overall performance and lightness of the polymer.

Articles are sought that summarize selected areas (reviews) or discuss the latest research in the field (original articles). The scope of this Special issue includes the synthesis and characterization of LDHs, their hybrids, and polymeric nanocomposites, as well as their applications.

Prof. Dr. José Ignacio Velasco
Dr. Vera Realinho
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 papers will be 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. Applied Sciences 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 1800 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

  • synthesis routes
  • layer and interlayer composition
  • hybrids
  • structural characterization
  • polymeric nanocomposites applications

Published Papers (1 paper)

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Research

Open AccessArticle
Designing Magnetic Layered Double Hydroxides and Two-Dimensional Magnetic Nano-Nets of Cobalt Ferrite through a Novel Approach
Appl. Sci. 2018, 8(11), 2099; https://doi.org/10.3390/app8112099 - 01 Nov 2018
Cited by 4
Abstract
The present study has a dual aim of supporting magnetic nanoparticles over the nanolayers of LDHs and designing two-dimensional magnetic nano-nets of cobalt ferrite. In this trend, nanoparticles of CoFe2O4 were prepared and supported by Co-Fe LDH through urea hydrolysis. [...] Read more.
The present study has a dual aim of supporting magnetic nanoparticles over the nanolayers of LDHs and designing two-dimensional magnetic nano-nets of cobalt ferrite. In this trend, nanoparticles of CoFe2O4 were prepared and supported by Co-Fe LDH through urea hydrolysis. The nanolayered structures of Co-Fe LDH were confirmed by X-ray diffraction, energy-dispersive X-ray spectrometry, FT-IR spectra, thermal analyses, and transmission electron microscopy. In addition, they indicated that 13.2% CoFe2O4 were supported over Co-Fe LDH. Transformation of the nanolayered structures of Co-Fe LDH to nano-nets was achieved by the catalytic effect of the supported CoFe2O4 nanoparticles through solvent thermal technique. X-ray diffraction patterns and transmission electron microscopy images confirmed the transformation of the supported Co-Fe LDH to nano-nets of cobalt ferrite. In order to indicate the effect of the LDH for designing the nano-nets, nanoparticles of cobalt ferrite were prepared by the same technique without LDH. The magnetic behavior of the nano-nets and the supported Co-Fe LDH were measured and compared with the nanoparticles through vibrating sample magnetometer technique. The magnetic parameters indicated that the prepared nano-nets have ferromagnetic behavior and high coercivity. However, the prepared nanoparticles revealed a superparamagnetic state and low coercivity. The experimental results concluded that the incorporation of nanoparticles with nanowires into nano-net structures has been found to be an efficient way to improve their magnetic properties and prevent their agglomerations. Finally, layered double hydroxides are an important source for constructing magnetic nanolayered structures and nano-nets. Full article
(This article belongs to the Special Issue Layered Double Hydroxides: Nanoparticles, Hybrids and Nanocomposites)
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