Special Issue "Layered Double Hydroxide-Based Catalytic Materials for Sustainable Processes"

A special issue of Catalysts (ISSN 2073-4344). This special issue belongs to the section "Catalytic Materials".

Deadline for manuscript submissions: 31 October 2020.

Special Issue Editors

Prof. Ioan-Cezar Marcu
E-Mail Website
Guest Editor
Research Center for Catalysts and Catalytic Processes, Faculty of Chemistry, University of Bucharest, 4-12, Blv. Regina Elisabeta, 030018 Bucharest, Romania
Interests: heterogeneous catalysis; catalytic processes; oxide-based catalysts; catalytic combustion of hydrocarbons and VOCs; light alkanes oxidative dehydrogenation; redox and electronic properties of oxide catalysts
Dr. Octavian Dumitru Pavel
E-Mail Website
Guest Editor
Research Center for Catalysts and Catalytic Processes, Faculty of Chemistry, University of Bucharest, 4-12, Blv. Regina Elisabeta, 030018 Bucharest, Romania
Interests: heterogeneous catalysis; preparation and modification of LDH-type catalysts; mechanochemistry; LDH characterization; catalytic processes; fine chemical synthesis; selective oxidation reactions

Special Issue Information

Dear Colleagues,

Layered double hydroxides (LDHs), also known as two-dimensional anionic clays, as well as the derived materials, including hybrids, nanocomposites, mixed oxides, and supported metals, have been highlighted as outstanding heterogeneous catalysts with unlimited applications in various processes involving both acid-base (addition, alkylation, acylation, decarboxylation, etc.) and redox (oxidation, reduction, dehydrogenation, etc.) mechanisms. This is mainly due to their flexibility in chemical composition allowing finely tuning the nature of the active sites and controlling the balance between them. Additionally, LDHs display a large anion exchange capacity and the possibility to modify their interlayer space, constraining the size and type of reactants entering in the interlamellar space. Further, their easy and economic synthesis, with high levels of purity and efficiency, both at laboratory and industrial scale, make LDH and their derived materials excellent solid catalysts. This Special Issue collects original research papers, reviews, and commentaries focused on the catalytic applications of these remarkable materials. 

Prof. Ioan-Cezar Marcu
Dr. Octavian Dumitru Pavel
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. Catalysts is an international peer-reviewed open access monthly 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

  • Layered double hydroxide
  • LDH-based hierarchically structured catalysts
  • LDH-supported catalysts
  • Acid-base catalysis
  • Redox catalysis
  • Sustainable chemical processes
  • Fine chemical synthesis
  • Environmental catalysis

Published Papers (2 papers)

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Research

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Open AccessArticle
Ultrasonic-Assisted Michael Addition of Arylhalide to Activated Olefins Utilizing Nanosized CoMgAl-Layered Double Hydroxide Catalysts
Catalysts 2020, 10(2), 220; https://doi.org/10.3390/catal10020220 - 11 Feb 2020
Abstract
An efficient cobalt-based layered double hydroxide (LDH)-catalyzed Michael addition of an aryl halide compound onto activated olefin as a Michael acceptor is described. The synthesized catalytic materials were characterized using different techniques to investigate their physicochemical, morphological, and textural properties. The partial isomorphic [...] Read more.
An efficient cobalt-based layered double hydroxide (LDH)-catalyzed Michael addition of an aryl halide compound onto activated olefin as a Michael acceptor is described. The synthesized catalytic materials were characterized using different techniques to investigate their physicochemical, morphological, and textural properties. The partial isomorphic substitution of magnesium by cobalt ions in the cationic sheets of the layered double hydroxide (CoMgAl-LDH) appears to be an appropriate catalyst to cause this reaction. This technique enables compound synthesis resulting from the 1,4-addition in good to excellent yields. Moreover, ultrasound was found to have beneficial effect on this reaction due to the cavitation phenomenon. Full article
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Review

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Open AccessFeature PaperReview
Highlights on the Catalytic Properties of Polyoxometalate-Intercalated Layered Double Hydroxides: A Review
Catalysts 2020, 10(1), 57; https://doi.org/10.3390/catal10010057 - 01 Jan 2020
Abstract
Layered double hydroxides (LDH) are an extended class of two-dimensional anionic materials that are known for their unique lamellar structure, versatile composition, and tunable properties. The layered architecture allows the intercalation between the positively charged sheets of a vast variety of anionic species, [...] Read more.
Layered double hydroxides (LDH) are an extended class of two-dimensional anionic materials that are known for their unique lamellar structure, versatile composition, and tunable properties. The layered architecture allows the intercalation between the positively charged sheets of a vast variety of anionic species, including oxometalates and polyoxometalates (POM). The hybrid composites that were developed using POM and LDH show great advantages when compared to both parent materials causing the appearance of new functionalities, which may lead to remarkable contributions in many areas of application, especially in catalysis. The current review paper emphases all of the crucial works already existing in literature that are related to the large group of POM-LDH solids and their use as catalysts for fine organic synthesis. The new trends in the development of the POM-LDH catalysts are highlighted based on the overview of 121 scientific articles that were published between 1984 and 2019. The main topics are focused primarily on the synthesis, characterization, and the catalytic applications of different LDH systems hosting polyoxometalates with low, medium, and high nuclearity. The intense exploration of the POM-LDH field has led to the obtaining of countless effective catalysts used in various types of reactions, from condensation, esterification, halodecarboxylation, to oxidation and epoxidation. Full article
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Planned Papers

The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.

1. Title: Highlights on the catalytic properties of polyoxometalate-intercalated layered double hydroxides: a review

Elisabeta STAMATE, Octavian D. PAVEL, Rodica ZAVOIANU and Ioan-Cezar MARCU.

2. Title: Catalytic activity of layered double hydroxides: applications in sustainable processes

Prof. Wojciech Stawinski <[email protected]>

3. Prof. Ioana Fechet1, Prof. Francois GARIN2

1International Center for CVD Innovation-Nogent, Pole Technologique Sud Champagne, Université de Troyes-Antenne de Nogent, 26, rue Lavoisier, 52800 Nogent, France.

2Institut de Chimie et Procédés pour l'Energie, l'Environnement et la Santé ICPEES, UMR 7515 CNRS, Université de Strasbourg, 25 rue Becquerel, 67087 Strasbourg Cedex 2, France.

4. Title: Photodegradation of 4-nitrophenol by Zn-containing layered double hydroxide and its thermal decomposition product

 Authors: Trujillano R., Rives, V., Nájera C.

GIR-QUESCAT, Departamento de Química Inorgánica, Universidad de Salamanca, 37008-Salamanca, España

Abstract: 4-Nitrophenol (4-NP) is one of the most common contaminants in industrial waters, since it is used for the synthesis of drugs, fungicides, dyes, explosives, colouring agents for leather, etc., and it is also generated during formulation or degradation of pesticides. In this work we have synthesized a ZnAl-carbonate hydrotalcite by coprecipitation and it has been calcined at 650 ºC in order to obtain a highly dispersed ZnAl mixed oxide. These two phases have been tested for their activity in photocatalytic degradation of 4-nitrophenol. Structural, chemical and textural characterization of the solids has been fully accomplished. The performance of the catalysts in the adsorption and degradation of the contaminant in the dark or under UV-light is compared to that of bulk, commercial, ZnO. The reactions have been followed by means of UV spectra of the aliquots of the suspension of the contaminant taken at different times. The activity of the synthesised solids on the degradation reaction of 4-nitrophenol aqueous solution exceeded that observed with commercial ZnO.

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