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Crystals
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Porous Materials and Their Adsorption Properties
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Porous Materials and Their Adsorption Properties

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

Deadline for manuscript submissions: closed (25 July 2024) | Viewed by 6002

Special Issue Editors

Dr. Leticia Santamaría

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Guest Editor
INAMAT^2-Departamento de Ciencias, Edificio de los Acebos, Universidad Pública de Navarra, Campus de Arrosadía, 31006 Pamplona, Spain
Interests: adsorption removal of emerging pollutants; synthesis of materials designed for environmental applications
Prof. Dr. Miguel A. Vicente

E-Mail Website
Guest Editor
GIR-QUESCAT, Departamento de Química Inorgánica, Universidad de Salamanca, E-37008 Salamanca, Spain
Interests: clay-based materials; preparation, characterization, and catalytic activity of metal supported nanocatalysts; surface properties of solids; pollutants adsorption; environmental management
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Antonio Gil Bravo

E-Mail Website
Guest Editor
INAMAT^2-Departamento de Ciencias, Edificio de los Acebos, Universidad Pública de Navarra, Campus de Arrosadía, 31006 Pamplona, Spain
Interests: preparation, characterization, and catalytic activity of metal-supported catalysts; surface properties of solids; pollutants adsorption; environmental management; industrial waste valorization
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The study of the adsorption properties of porous materials has been proven to be of great interest for the removal of impurities from both liquid and gas media. Although significant progress has been achieved, some adsorption studies miss out on the opportunity to further advance in generating a better understanding of the adsorption process. This Special Issue on “Porous materials and their adsorption properties” calls for papers where a further goal is met. We are looking for studies that present in-depth results of the adsorption properties of porous materials in both the solid–gas and solid–liquid interfaces, including, but not limited to, the following:

  • The properties of the material: the relationship between the crystal structure and the adsorption capacity of the adsorbent, surface characterization, correlation between the porosity and the adsorption capacity, influence of the surface acidity, and basicity on the adsorption process
  • Analysis of the interactions between the adsorbent and adsorbate molecules: the adsorption mechanism, type of sorption, theoretical modelling, and kinetic and thermodynamic studies.

We looking forward to receiving your contributions.

Dr. Leticia Santamaría
Prof. Dr. Miguel A. Vicente
Prof. Dr. Antonio Gil Bravo
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

  • adsorption mechanism
  • surface characterization
  • theoretical modelling
  • kinetic and thermodynamic studies
  • crystal structure
  • surface acidity and basicity
  • porosity effect

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Published Papers (4 papers)

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Research

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17 pages, 14574 KiB  
Article
Dynamics of Core–Shell-Structured Sorbents for Enhanced Adsorptive Separation of Carbon Dioxide
by Katarzyna Bizon, Marcin Gunia and Mateusz Prończuk
Crystals 2024, 14(7), 597; https://doi.org/10.3390/cryst14070597 - 27 Jun 2024
Viewed by 1357
Abstract
One of the key environmental problems underlying climate change and global warming is the persistent increase in atmospheric carbon dioxide concentration. Carbon capture and storage (CCS) systems can be based on, among others, solid porous sorbents (e.g., zeolites). A promising alternative to traditionally [...] Read more.
One of the key environmental problems underlying climate change and global warming is the persistent increase in atmospheric carbon dioxide concentration. Carbon capture and storage (CCS) systems can be based on, among others, solid porous sorbents (e.g., zeolites). A promising alternative to traditionally used sorbents may be appropriately structured hybrid adsorbents. With the proper geometry and synergistic combination of the sorbent with another material, e.g., a catalyst or a substance with certain useful physical features, they can gain new properties. The present study examined the dynamics of CO2 sorption in core–shell particles and, as a reference, in particles with a uniform structure. It was assumed that the sorbent (zeolite 5A) incorporated in a single particle had the form of microcrystals, which implies a bidisperse particle structure. As a second particle-forming material, a nickel catalyst (behaving as an inert) was adopted. The computational results confirmed that particle structure can provide an additional design parameter for adsorption columns and adsorptive reactors. The sorption-inactive shell proved to play a protective role when thermal waves moved through the bed. In addition, an important element determining sorption dynamics in core–shell particles was revealed to be the structure (e.g., mean pore diameter) controlling intraparticle mass transport. Full article
(This article belongs to the Special Issue Porous Materials and Their Adsorption Properties)
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20 pages, 6406 KiB  
Article
Synthesis and Characterization of Zinc Oxide Nanoparticle Anchored Carbon as Hybrid Adsorbent Materials for Effective Heavy Metals Uptake from Wastewater
by Abdullah G. Alanazi, Mohamed A. Habila, Zeid A. ALOthman and Ahmed-Yacine Badjah-Hadj-Ahmed
Crystals 2024, 14(5), 447; https://doi.org/10.3390/cryst14050447 - 8 May 2024
Cited by 1 | Viewed by 1668
Abstract
Hybrid material-derived adsorbents have shown a great applicable efficiency in various fields, including industrial uses and environmental remediation. Herein, zinc oxide nanoparticle modified with carbon (ZnO-C) was fabricated and utilized for wastewater treatment through the adsorption of Zn(II), Cd(II), Co(II), and Mn(II). The [...] Read more.
Hybrid material-derived adsorbents have shown a great applicable efficiency in various fields, including industrial uses and environmental remediation. Herein, zinc oxide nanoparticle modified with carbon (ZnO-C) was fabricated and utilized for wastewater treatment through the adsorption of Zn(II), Cd(II), Co(II), and Mn(II). The surface and structural characteristics were examined using TEM, SEM, XRD, FTIR spectroscopy, EDS, and the BET surface area. Kinetics and equilibrium investigations were applied to optimize the adsorptive removal of Zn(II), Cd(II), Co(II), and Mn(II) onto ZnO-C. The results indicated that the formation of ZnO-C in crystalline sphere-like granules with a nano-size between 16 and 68 nm together with carbon matrix. In addition, the spherical granules of zinc oxide were gathered to form clusters. FTIR spectroscopy indicated that the ZnO-C surface was rich with OH groups and ZnO. The adsorption capacity 215, 213, 206, and 231 mg/g for Zn(II), Cd(II), Co(II), and Mn(II), respectively, at the optimal conditions pH between 5 and 6, a contact time of 180 min, and an adsorbent dose of 0.1 g/L. The adsorptive removal data modeling for the uptake of Zn(II), Cd(II), Co(II), and Mn(II) onto ZnO-C showed agreement with the assumption of the pseudo-second-order kinetic model and the Freundlich isotherm, suggesting a fast adsorption rate and a multilayered mechanism. The achieved adsorption capacity using the prepared ZnO-C was more effective compared to ZnO, carbon, Fe3O4, and Fe3O4-C. Real wastewater samples were applied, including valley water, industrial wastewater, and rain wastewater, and evaluated for the applicable uptake of Zn(II), Cd(II), Co(II), and Mn(II) using ZnO-C and Fe3O4-C with effective removal efficiency. Full article
(This article belongs to the Special Issue Porous Materials and Their Adsorption Properties)
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13 pages, 24029 KiB  
Article
Highly Porous Layered Double Hydroxide and Mixed Metal Oxide by Sacrificial Bio-Template, Egg White Foam
by Vidya Chandrabose, Ji won Park, Sang Yong Jung, Kang Kyun Wang and Jae-Min Oh
Crystals 2023, 13(11), 1603; https://doi.org/10.3390/cryst13111603 - 20 Nov 2023
Cited by 1 | Viewed by 1290
Abstract
Highly porous layered double hydroxide (LDH) and its calcined mixed metal oxide (MMO) were obtained by utilizing egg white (EW) as a biogenic porous template. The LDH was prepared through coprecipitation under the existence of a beaten EW meringue, and the corresponding MMO [...] Read more.
Highly porous layered double hydroxide (LDH) and its calcined mixed metal oxide (MMO) were obtained by utilizing egg white (EW) as a biogenic porous template. The LDH was prepared through coprecipitation under the existence of a beaten EW meringue, and the corresponding MMO was obtained by calcining LDH at 500 °C. According to X-ray diffraction, the crystal structure of LDH and MMO was well-developed with or without EW. In contrast, the crystallinity analyses and microscopic investigations clearly showed differences in the particle orientation in the presence of EW; the protein arrangement in the EW foam induced the ordered orientation of LDH platelets along proteins, resulting in well-developed inter-particle pores. As a result, the distinctive particle arrangement in EW-templated samples compared with non-templated ones showed dramatically enhanced specific surface area and porosity. The nitrogen adsorption–desorption isotherm exhibited that the high specific surface area was attributed to the homogeneous nanopores in EW-templated LDH and MMO, which originated from the sacrificial role of the EW. Full article
(This article belongs to the Special Issue Porous Materials and Their Adsorption Properties)
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Review

Jump to: Research

28 pages, 2846 KiB  
Review
Investigating the Effect of Pore Size Distribution on the Sorption Types and the Adsorption-Deformation Characteristics of Porous Continua: The Case of Adsorption on Carbonaceous Materials
by Grigorios L. Kyriakopoulos, Konstantinos Tsimnadis, Ioannis Sebos and Yassine Charabi
Crystals 2024, 14(8), 742; https://doi.org/10.3390/cryst14080742 - 20 Aug 2024
Viewed by 948
Abstract
In the chemical industry and in the manufacturing sector, the adsorption properties of porous materials have been proven to be of great interest for the removal of impurities from liquid and gas media. While it is acknowledged that significant progress and literature production [...] Read more.
In the chemical industry and in the manufacturing sector, the adsorption properties of porous materials have been proven to be of great interest for the removal of impurities from liquid and gas media. While it is acknowledged that significant progress and literature production have been developed in this field, there have been adsorption studies that failed to further advance our knowledge in generating a better understanding of the prevailing sorption types and dominant adsorption processes. Therefore, this review study has focused on porous materials, their sorption types and their adsorption properties, further investigating the adsorption properties of porous materials at either solid–gas and solid–liquid interfaces, underscoring both the properties of the materials, the characterization and the correlation between the porosity and the adsorption capacity, as well as the emergent interactions between the adsorbent and adsorbate molecules, including the adsorption mechanisms, the types of sorption and the kinetic and thermodynamic information conveyed. Full article
(This article belongs to the Special Issue Porous Materials and Their Adsorption Properties)
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