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Crystals
Special Issues
Zeolites: Synthesis and Applications
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Zeolites: Synthesis and Applications

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

Deadline for manuscript submissions: closed (31 December 2021) | Viewed by 7071

Special Issue Editors

Dr. Moussa Zaarour

E-Mail Website1 Website2
Guest Editor
King Abdullah University of Science and Technology, KAUST Catalysis Center (KCC), Catalysis Nanomaterials and Spectroscopy (CNS), Thuwal 23955, Saudi Arabia
Interests: nanosized zeolites, design of heterogeneous catalysts, in-depth spectroscopic characterization, advanced applications
Dr. Sarah Komaty

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Guest Editor
King Abdullah University of Science and Technology, KAUST Catalysis Center (KCC), Catalysis Nanomaterials and Spectroscopy (CNS), Thuwal 23955, Saudi Arabia
Interests: nanozeolites; ship-in-bottle preparation; post-synthetic treatment; adsorption; medical applications
Dr. Hussein Awala

E-Mail Website
Guest Editor
Laboratoire de Chimie de Coordination Inorganique et Organométallique LCIO
Interests: zeolite nanoparticles; crystal growth; crystal engineering; nucleation; thin films; amorphous to crystal transformation; polymorph formation
Dr. Huan Doan

E-Mail Website
Guest Editor
Department of Mechanical Engineering, University of Bristol, Bristol BS8 1TR, UK
Interests: metal-organic framework; zeolite; hierarchical porous structures; catalysis; energy storage

Special Issue Information

Dear Colleagues,

Zeolites are of the few materials widely used in our everyday life: starting from personal consumption (detergents, cosmetics, etc.), to pharmaceuticals, medical, environmental, and major industrial applications. Due to their importance and wide use, new advances in preparing zeolites are of constant interest. This includes investigating greener preparation methods with less or no organic structural directing agents and engineering hierarchical zeolites and nanosized zeolites.
Investigating the crystallization mechanism and characterizing zeolites through advanced spectroscopic techniques pave the way for a deeper understanding of their properties and forecast their behavior in the targeted application, or new possible ones.
In this Special Issue, we invite contributions from all areas of zeolites. Topics include but are not limited to green synthesis methods of zeolites and related microporous materials, in situ incorporation of guest species or post-synthetic modification of zeolites, understanding zeolite crystallization, characterization of zeolites, and interdisciplinary applications.

Dr. Moussa Zaarour
Dr. Sarah Komaty
Dr. Hussein Awala
Dr. Huan Doan
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. 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 2100 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 of zeolite and related microporous materials
  • In situ incorporation of guest species
  • Post-synthetic modifications
  • Advanced characterizations
  • Applications

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Published Papers (2 papers)

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21 pages, 1695 KiB  
Article
Adsorption and Release Characteristics of Purified and Non-Purified Clinoptilolite Tuffs towards Health-Relevant Heavy Metals
by Mona M. Haemmerle, Joachim Fendrych, Elisabeth Matiasek and Cornelius Tschegg
Crystals 2021, 11(11), 1343; https://doi.org/10.3390/cryst11111343 - 3 Nov 2021
Cited by 8 | Viewed by 2759
Abstract
The occurrence of health-relevant contaminants in water has become a severe global problem. For treating heavy-metal-polluted water, the use of zeolite materials has been extended over the last decades, due to their excellent features of high ion exchange capacity and absorbency. The aim [...] Read more.
The occurrence of health-relevant contaminants in water has become a severe global problem. For treating heavy-metal-polluted water, the use of zeolite materials has been extended over the last decades, due to their excellent features of high ion exchange capacity and absorbency. The aim of this study was to assess the effect of heavy metal uptake of one purified (PCT) and two non-purified clinoptilolite tuffs (NPCT1 and NPCT2) in aqueous solutions on monovalent ions Ni+, Cd+, Cs+, Ba+, Tl+, and Pb+. Experiments were furthermore carried out in artificial gastric and intestinal fluids to mimic human digestion and compare removal efficiencies of the adsorbent materials as well as release characteristics in synthetic gastric (SGF) and intestinal fluids (SIF). Batch experiments show low sorption capacities for Ni+ and Cd+ for all studied materials; highest affinities were found for Ba+ (99–100%), Pb+ (98–100%), Cs+ (97–98%), and Tl+ (96%), depending on the experimental setup for the PCT. For the adsorption experiments with SGF, highest adsorption was observed for the PCT for Pb+, with an uptake of 99% of the lead content. During artificial digestion, it was proven that the PCT did not release Ba+ cations into solution, whereas 13,574 ng·g−1 and 4839 ng·g−1 of Ba+ were measured in the solutions with NPCT1 and NPCT2, respectively. It was demonstrated that the purified clinoptilolite tuff is most effective in remediating heavy-metal-polluted water, particularly during artificial digestion (99% of Pb+, 95% of Tl+, 93% of Ba+). In addition, it was shown that the released amount of bound heavy metal ions (e.g., barium) from the non-purified clinoptilolite tuffs into the intestinal fluids was significantly higher compared to the purified product. Full article
(This article belongs to the Special Issue Zeolites: Synthesis and Applications)
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13 pages, 1236 KiB  
Perspective
A Short Review on the Utilization of Incense Sticks Ash as an Emerging and Overlooked Material for the Synthesis of Zeolites
by Virendra Kumar Yadav, Nisha Choudhary, Vineet Tirth, Haresh Kalasariya, Govindhan Gnanamoorthy, Ali Algahtani, Krishna Kumar Yadav, Sunil Soni, Saiful Islam, Shalini Yadav and Byong-Hun Jeon
Crystals 2021, 11(10), 1255; https://doi.org/10.3390/cryst11101255 - 15 Oct 2021
Cited by 13 | Viewed by 3264
Abstract
The traditional hydrothermal synthesis methods are mainly performed under batch operation, which generally takes few days to weeks to yield a zeolite with the desired properties and structure. The zeolites are the backbone of the petrochemical and wastewater industries due to their importance. [...] Read more.
The traditional hydrothermal synthesis methods are mainly performed under batch operation, which generally takes few days to weeks to yield a zeolite with the desired properties and structure. The zeolites are the backbone of the petrochemical and wastewater industries due to their importance. The commercial methods for zeolite synthesis are expensive, laborious and energy intensive. Among waste products, incense sticks ash is a compound of aluminosilicates and could act as a potential candidate for the synthesis of zeolites for daily needs in these industries. Incense sticks ash is the byproduct of religious places and houses and is rich in Ca, Mg, Al and Si. As a result, incense sticks ash can be proven to be a potential candidate for the formation of calcium-rich zeolites. The formation of zeolites from incense sticks ash is an economical, reliable and eco-friendly method. The application of incense sticks ash for zeolite synthesis can also minimize the problem related to its disposal in the water bodies, which will also minimize the solid waste in countries where it is considered sacred and generated in tons every day. Full article
(This article belongs to the Special Issue Zeolites: Synthesis and Applications)
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