Special Issue "Advances in Microporous and Mesoporous Materials"

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Porous Materials".

Deadline for manuscript submissions: 30 June 2020.

Special Issue Editor

Prof. Pascal Van Der Voort
E-Mail Website
Guest Editor
Center for Ordered Materials, Organometallics and Catalysis, Department of Chemistry, Ghent University, Belgium
Interests: ordered mesostructures; metal organic frameworks (MOFs); periodic mesoporous organosilicas; Covalent Organic Frameworks; adsorption; catalysis & catalytic materials

Special Issue Information

Dear Colleagues,

We are experiencing exciting times in the field of microporous and mesoporous materials. After the revolution in 1992 caused by Mobil, we now see how hybrid materials, and even purely organic compounds are quickly finding applications. Furthermore, new materials are being developed every day. I am referring to the MOFs, the PMOs, the COFs, the CTFs, and novel forms of porous and conducting carbons. On the other hand, we should not forget that research on zeolites and mesoporous silica is still very much alive, and even today more papers are published on the topic of zeolites than on the other mentioned materials.

My interest lies in “hybrid materials for sustainability”, but many other applications are exciting, from sensors to dental fillings, from drug carriers to thermochromic materials, next to the highly important fields of catalysis, gas storage and separation, and liquid phase adsorption.

I truly hope you will contribute to this exciting Special Issue of Materials, as we celebrate 20 years of MOFs and PMOs, which both broke through in 1999.

Prof. Pascal Van Der Voort
Guest Editor

Manuscript Submission Information

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Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2000 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

  • hybrid materials
  • MOF
  • COF
  • CTF
  • PMO
  • carbon
  • zeolite
  • ordered materials
  • new materials
  • sustainability
  • sensors
  • catalysis
  • adsorption

Published Papers (5 papers)

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Research

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Open AccessArticle
Transition Metal Oxodiperoxo Complex Modified Metal-Organic Frameworks as Catalysts for the Selective Oxidation of Cyclohexane
Materials 2020, 13(4), 829; https://doi.org/10.3390/ma13040829 - 12 Feb 2020
Abstract
In this work, a series of modified metal-organic frameworks (MOFs) have been prepared by pre- and post-treatment with transition metal oxodiperoxo complexes (MoO(O2)2, WO(O2)2, and KVO(O2)2). The obtained materials are characterized [...] Read more.
In this work, a series of modified metal-organic frameworks (MOFs) have been prepared by pre- and post-treatment with transition metal oxodiperoxo complexes (MoO(O2)2, WO(O2)2, and KVO(O2)2). The obtained materials are characterized by XRD, FTIR, SEM, TEM, inductively coupled plasma atomic emission spectrometry (ICP-AES), and X-ray photoelectron spectroscopy (XPS), as well as by N2 adsorption/desorption measurement. The characterization results show that transition metal oxodiperoxo complexes are uniformly incorporated into the MOF materials without changing the basic structures. The performance of cyclohexane oxidation on metal oxodiperoxo complex modified MOFs are evaluated. UiO-67-KVO(O2)2 shows the best performance for cyclohexane oxidation, with 78% selectivity to KA oil (KA oil refers to a cyclohexanol and cyclohexanone mixture) at 9.4% conversion. The KA selectivity is found to depend on reaction time, while hot-filtration experiments indicates that the catalytic process is heterogeneous with no leaching of metal species. Full article
(This article belongs to the Special Issue Advances in Microporous and Mesoporous Materials)
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Open AccessArticle
Monometallic Cerium Layered Double Hydroxide Supported Pd-Ni Nanoparticles as High Performance Catalysts for Lignin Hydrogenolysis
Materials 2020, 13(3), 691; https://doi.org/10.3390/ma13030691 - 04 Feb 2020
Abstract
Monometallic cerium layered double hydroxides (Ce-LDH) supports were successfully synthesized by a homogeneous alkalization route driven by hexamethylenetetramine (HMT). The formation of the Ce-LDH was confirmed and its structural and compositional properties studied by XRD, SEM, XPS, iodometric analyses and TGA. HT-XRD, N [...] Read more.
Monometallic cerium layered double hydroxides (Ce-LDH) supports were successfully synthesized by a homogeneous alkalization route driven by hexamethylenetetramine (HMT). The formation of the Ce-LDH was confirmed and its structural and compositional properties studied by XRD, SEM, XPS, iodometric analyses and TGA. HT-XRD, N2-sorption and XRF analyses revealed that by increasing the calcination temperature from 200 to 800 °C, the Ce-LDH material transforms to ceria (CeO2) in four distinct phases, i.e., the loss of intramolecular water, dehydroxylation, removal of nitrate groups and removal of sulfate groups. When loaded with 2.5 wt% palladium (Pd) and 2.5 wt% nickel (Ni) and calcined at 500 °C, the PdNi-Ce-LDH-derived catalysts strongly outperform the PdNi-CeO2 benchmark catalyst in terms of conversion as well as selectivity for the hydrogenolysis of benzyl phenyl ether (BPE), a model compound for the α-O-4 ether linkage in lignin. The PdNi-Ce-LDH catalysts showed full selectivity towards phenol and toluene while the PdNi-CeO2 catalysts showed additional oxidation of toluene to benzoic acid. The highest BPE conversion was observed with the PdNi-Ce-LDH catalyst calcined at 600 °C, which could be related to an optimum in morphological and compositional characteristics of the support. Full article
(This article belongs to the Special Issue Advances in Microporous and Mesoporous Materials)
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Open AccessArticle
Thiol-Functionalized Ethylene Periodic Mesoporous Organosilica as an Efficient Scavenger for Palladium: Confirming the Homogeneous Character of the Suzuki Reaction
Materials 2020, 13(3), 623; https://doi.org/10.3390/ma13030623 - 30 Jan 2020
Abstract
This work describes the synthesis of thiol-functionalized periodic mesoporous organosilicas (PMOs) prepared using the precursor 1-thiol-1,2-bis(triethoxysilyl)ethane, alone or mixed with 1,2-bis(triethoxysilyl)ethane. The thiol groups incorporated into the structure were found to be efficient for palladium binding. This has allowed these materials to be [...] Read more.
This work describes the synthesis of thiol-functionalized periodic mesoporous organosilicas (PMOs) prepared using the precursor 1-thiol-1,2-bis(triethoxysilyl)ethane, alone or mixed with 1,2-bis(triethoxysilyl)ethane. The thiol groups incorporated into the structure were found to be efficient for palladium binding. This has allowed these materials to be used as catalysts in the Suzuki cross-coupling reaction of bromobenzene and phenylboronic acid. Their performance has been compared to palladium-supported periodic mesoporous (organo)silicas and important differences have been observed between them. The use of different heterogeneity tests, such as hot filtration test and poisoning experiments, has provided a deep insight into the reaction mechanism and has confirmed that the reaction occurs in the homogeneous phase following a “release and catch” mechanism. Furthermore, the thiol-functionalized periodic mesoporous organosilica, synthesized using only 1-thiol-1,2-bis(triethoxysilyl)ethane as a precursor, has proven to be an efficient palladium scavenger. Full article
(This article belongs to the Special Issue Advances in Microporous and Mesoporous Materials)
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Open AccessFeature PaperArticle
Terbium Ion Adsorption from Aqueous Solution by Using Magnetic γ-Fe2O3-NH4[email protected]2 Nanoparticles Functionalized with Amino Groups
Materials 2019, 12(8), 1294; https://doi.org/10.3390/ma12081294 - 19 Apr 2019
Cited by 2
Abstract
New magnetic stabilized and functionalized [email protected] nanoparticles (NPs) were synthesized in a simple way and characterized in order to adsorb Tb3+ from aqueous solution with a very low Tb3+ concentration. For the fluorescence determination of adsorption efficiency and capacity, tiron monohydrate [...] Read more.
New magnetic stabilized and functionalized [email protected] nanoparticles (NPs) were synthesized in a simple way and characterized in order to adsorb Tb3+ from aqueous solution with a very low Tb3+ concentration. For the fluorescence determination of adsorption efficiency and capacity, tiron monohydrate as a ligand was used. The obtained results confirm the potential of the synthesized magnetic γ-Fe2O3-NH4[email protected]2 NPs, functionalized with (3-Aminopropyl) trimethoxysilane (APTMS), to be used for adsorption of Tb3+ from aqueous solution, with the possibility of its removal from aqueous solution via an external magnet. The endothermic and spontaneous adsorption follows a pseudo-second-order kinetic model, and the adsorption equilibrium data fit the Temkin isotherm well. The maximum adsorption efficiency from aqueous solution with a 2 × 10−6 M concentration of Tb3+ is over 90% at pH 7. Full article
(This article belongs to the Special Issue Advances in Microporous and Mesoporous Materials)
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Review

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Open AccessReview
Light-Emitting Lanthanide Periodic Mesoporous Organosilica (PMO) Hybrid Materials
Materials 2020, 13(3), 566; https://doi.org/10.3390/ma13030566 - 24 Jan 2020
Abstract
Periodic mesoporous organosilicas (PMOs) have a well ordered mesoporous structure, a high thermal and mechanical stability and a uniform distribution of organic functionalities in the pore walls. The organic groups allow PMOs to be modified and functionalized by using a wide range of [...] Read more.
Periodic mesoporous organosilicas (PMOs) have a well ordered mesoporous structure, a high thermal and mechanical stability and a uniform distribution of organic functionalities in the pore walls. The organic groups allow PMOs to be modified and functionalized by using a wide range of organic reactions. Since their first report in 1999, PMOs have found a vast range of applications, such as for catalysis, adsorbents, low-k films, biomedical supports and also for optical applications. Optical applications are very interesting as PMOs offer the possibility of designing advanced luminescent hybrid materials comprising of organic components, yet with much higher stability and very good processability. Despite their promising possibilities, the optical properties of pristine PMOs and PMOs grafted with d-metal or f-metal ions and complexes have been explored less frequently. In this review, we aimed to overview the exciting light emitting properties of various reported lanthanide PMO hybrid materials and interest the reader in this promising application for lanthanide PMO materials. Full article
(This article belongs to the Special Issue Advances in Microporous and Mesoporous Materials)
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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.

Author: Vera Meynen (professor)
Affiliation: University of Antwerp, Belgium

Author:Dirk De Vos (professor)
Affiliation:
KU Leuven, Belgium

Author:Damien Debecker (professor)
Affiliation:
Universite Catholique de Louvain, Belgium 

Author:Hermenegildo Garcia (professor)
Affiliation:
The Instituto de Tecnología Química, Spain

Author:Johan Martens (professor)
Affiliation:
KU Leuven, Belgium

Author:Dolores Esquivel (professor)
Affiliation:
University of Córdoba, Spain

Author:Rafael Luque (professor)
Affiliation:
Universidad de Cordoba, Spain

Author:Anna Kaczmarek
Affiliation:
Ghent University, Belgium

Author:Shiquan Liu (professor)
Affiliation:
University of Jinan, China

Author:An Verberckmoes (professor)
Affiliation:
Ghent University, Belgium

Author:Asamanjoy Bhunia
Affiliation:
Karlsruhe Institute of Technology (KIT), Germany

Author:Ying-Ya Liu (associate professor)
Affiliation: 
Dalian University of Technology, China

Author: Roger Gläser (professor)
Affiliation:
Leipzig University, Germany

Author: Freddy Kleitz (professor)
Affiliation:
University of Vienna, Austria

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