Special Issue "New Horizons in Zeolites and Zeolite-Like Materials"

A special issue of Crystals (ISSN 2073-4352). This special issue belongs to the section "Crystalline Materials".

Deadline for manuscript submissions: closed (30 June 2019).

Special Issue Editor

Guest Editor
Prof. Dr. Leonid Kustov Website E-Mail
1. National University of Science and Technology, Moscow 119049, Russian Federation
2. Department of Chemistry, M. V. Lomonosov Moscow State University, Moscow 119992, Russian Federation
3. N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Moscow 119991, Russian Federation
Interests: catalysis; nanomaterials; renewables; green chemistry

Special Issue Information

Dear Colleagues,

It is a great pleasure for me to invite you to submit a manuscript to the Special Issue "New Horizons in Zeolites and Zeolite-Like Materials", which will be published in the journal Crystals.

This Special Issue targets interdisciplinary state-of-the-art research articles, communications, and reviews related to various aspects of the synthesis, characterization and application of zeolites and zeolite-like materials. Two rapidly developing vectors are currently emerging in this area: novel applications for the “old” systems (conventional zeolite) and fascinating hybrid zeolite-like materials, including diverse mesoporous materials (oxide-, carbon-, and polymer-based) and coordination polymers, such as metal organic frameworks (MOFs), covalent organic frameworks (COFs) and zeolitic imidazolate frameworks (ZIFs). All these materials exhibit a clear molecular sieve effect and extended micro/meso porosity. In some aspects, these newcomers are better or richer in properties and structures than the classical zeolites and provide more opportunities for variation of the structure and composition. The true zeolite nature of the newcomers in the zeolite world can be easily recognized from the shape-selectivity effects, huge specific surface areas and pore volumes, and typical zeolite architecture. Zeolite-like materials play a paramount role in contemporary research and practice. Advanced architectures provide a driving force for the progress in diverse research areas, including the development of new nano-engineered catalysts and adsorbents, smart and stimuli-responsive materials, sensors, as well as materials for energy applications (harvesting, storage). The incentive of this Special Issue is to show progress in key aspects of the broad “zeolite” arena. Combining individual contributions from these areas will allow us to produce the journal issue with a high impact. Thus, submissions focused on any new zeolite-like materials and their novel applications are cordially invited.

Please note that Crystals is an open access journal, and the whole Special Issue will be freely available for all readers across the world. Information about open access options and conditions is provided on the journal website.

Prof. Dr. Leonid Kustov
Guest Editor

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. Crystals 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 1400 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

  • zeolite-like materials
  • catalysis; adsorption
  • nanomaterials
  • hybrid materials
  • characterization of nanomaterials

Published Papers (4 papers)

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Research

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Open AccessArticle
Synthesis and Characterization of Crystalline NaY-Zeolite from Belitung Kaolin as Catalyst for n-Hexadecane Cracking
Crystals 2019, 9(8), 404; https://doi.org/10.3390/cryst9080404 - 04 Aug 2019
Abstract
Crystalline sodium Y (NaY) zeolite has been synthesized using alternative natural source of aluminate and silicate, extracted from natural Belitung kaolin. Prior to use, the natural kaolin was pretreated to obtain fragmented metakaolin and extracted silica. Synthesis was conducted with the addition of [...] Read more.
Crystalline sodium Y (NaY) zeolite has been synthesized using alternative natural source of aluminate and silicate, extracted from natural Belitung kaolin. Prior to use, the natural kaolin was pretreated to obtain fragmented metakaolin and extracted silica. Synthesis was conducted with the addition of NaY gel (two types of NaY seeds were used, prepared from colloidal sillica or sodium silica water) using hydrothermal method for 21 h at 100 °C. The characterization on the as-synthesized zeolites confirmed that the one prepared using colloidal silica-seed has closer structure similarity to NaY zeolite that was synthesized using pro analysis silicate and aluminate sources. Thus, the rest of the synthesis of NaY was carried out using colloidal silica-NaY seed. The NaY zeolites then were converted to HY, through ammonium-exchange followed by calcination, to be tested as cracking catalysts using n-hexadecane as a probe molecule. It shows that HY from metakaolin and extracted silica gives high performance, i.e., n-hexadecane conversion of 58%–64%, also C5-C12 percentage yield and selectivity of 56%–62% and 98%. This work has shown the potential to utilize kaolin as alternative silicate aluminate sources for crystalline zeolite synthesis and to obtain inexpensive and environmentally friendly catalyst materials. Full article
(This article belongs to the Special Issue New Horizons in Zeolites and Zeolite-Like Materials)
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Open AccessArticle
First-Principles Study on Hydrogen Storage Performance of Transition Metal-Doped Zeolite Template Carbon
Crystals 2019, 9(8), 397; https://doi.org/10.3390/cryst9080397 - 31 Jul 2019
Abstract
The hydrogen adsorption characteristics and mechanism of transition metal-doped zeolite template carbon (ZTC) as a novel porous material are studied by theoretical calculations employing first-principle all-electron atomic orbital method based on density functional theory. The stability of transition metal atoms (Sc, Ti, and [...] Read more.
The hydrogen adsorption characteristics and mechanism of transition metal-doped zeolite template carbon (ZTC) as a novel porous material are studied by theoretical calculations employing first-principle all-electron atomic orbital method based on density functional theory. The stability of transition metal atoms (Sc, Ti, and V) decorated on zeolite template carbon is investigated by calculating the absorption binding energy. The adsorption configurations of the doped metal atom and adsorbed hydrogen are obtained from the energy functional minimization of first-principles calculations. The underlying mechanism for improving hydrogen storage performance of ZTC by doping transition metal atoms are explored through analyzing charge/spin populations of metal atoms in combination with the calculated results of hydrogen adsorption quantity and binding energy. To improve the hydrogen storage capability, the Sc, Ti, and V are individually introduced into the ZTC model according to the triplex axisymmetry. The hydrogen storage properties of ZTC decorated with different metal atoms are characterized by the adsorption energy and structure of several hydrogen atoms. The more energetically stable complex system with higher binding energy and adsorbing distance of hydrogen than lithium-doped ZTC can be achieved by doping Sc, Ti, V atoms in ZTC, which is expected to fulfill the substantial safe hydrogen storage by increasing hydrogen capacity with multi-sites doping of transition metal atoms. The present investigation provides a theoretical basis and predictions for the following experimental research and design of porous materials for hydrogen storage. Full article
(This article belongs to the Special Issue New Horizons in Zeolites and Zeolite-Like Materials)
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Open AccessArticle
Sustainable Route for Synthesis of All-Silica SOD Zeolite
Crystals 2019, 9(7), 338; https://doi.org/10.3390/cryst9070338 - 30 Jun 2019
Abstract
The development of the sustainable synthesis of zeolites has become a very hot topic in recent years. Herein, we report a sustainable route for synthesizing all-silica SOD zeolite under solvent-free conditions. The method of solvent-free synthesis includes mixing, grinding, and heating raw solids. [...] Read more.
The development of the sustainable synthesis of zeolites has become a very hot topic in recent years. Herein, we report a sustainable route for synthesizing all-silica SOD zeolite under solvent-free conditions. The method of solvent-free synthesis includes mixing, grinding, and heating raw solids. The all-silica SOD zeolite obtained was well characterized by multiple measurement techniques (XRD, SEM, IR, thermogravimetric-differential thermal analysis (TG-DTA), and magic angel spinning nuclear magnetic resonance (MAS NMR)). The crystallization process of all-silica SOD zeolite was also investigated in detail by XRD, SEM, UV-Raman, and MAS NMR techniques. In addition, the effects of the crystallization compositions, including the molar ratios of Na2O/SiO2 and ethylene glycol/SiO2, on the synthesis of the pure all-silica SOD zeolite were investigated at different temperatures. Full article
(This article belongs to the Special Issue New Horizons in Zeolites and Zeolite-Like Materials)
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Review

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Open AccessReview
Implementing Metal-Organic Frameworks for Natural Gas Storage
Crystals 2019, 9(8), 406; https://doi.org/10.3390/cryst9080406 - 04 Aug 2019
Abstract
Methane can be stored by metal-organic frameworks (MOFs). However, there remain challenges in the implementation of MOFs for adsorbed natural gas (ANG) systems. These challenges include thermal management, storage capacity losses due to MOF packing and densification, and natural gas impurities. In this [...] Read more.
Methane can be stored by metal-organic frameworks (MOFs). However, there remain challenges in the implementation of MOFs for adsorbed natural gas (ANG) systems. These challenges include thermal management, storage capacity losses due to MOF packing and densification, and natural gas impurities. In this review, we discuss discoveries about how MOFs can be designed to address these three challenges. For example, Fe(bdp) (bdp2− = 1,4-benzenedipyrazolate) was discovered to have intrinsic thermal management and released 41% less heat than HKUST-1 (HKUST = Hong Kong University of Science and Technology) during adsorption. Monolithic HKUST-1 was discovered to have a working capacity 259 cm3 (STP) cm−3 (STP = standard temperature and pressure equivalent volume of methane per volume of the adsorbent material: T = 273.15 K, P = 101.325 kPa), which is a 50% improvement over any other previously reported experimental value and virtually matches the 2012 Department of Energy (Department of Energy = DOE) target of 263 cm3 (STP) cm−3 after successful packing and densification. In the case of natural gas impurities, higher hydrocarbons and other molecules may poison or block active sites in MOFs, resulting in up to a 50% reduction of the deliverable energy. This reduction can be mitigated by pore engineering. Full article
(This article belongs to the Special Issue New Horizons in Zeolites and Zeolite-Like Materials)
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