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Crystals
Special Issues
Adsorption Capabilities of Porous Materials
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Adsorption Capabilities of Porous Materials

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

Deadline for manuscript submissions: closed (25 January 2025) | Viewed by 257

Special Issue Editor

Dr. Wei Wu

E-Mail Website
Guest Editor
Department of Physics and Astronomy and London Centre for Nanotechnology, University College London, Gower Street, London WC1E 6BT, UK
Interests: photoelectric materials; solar cells; clean energy; photoelectric devices
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The adsorption performance of porous materials is an important aspect for many applications, including environment control, nano-science and nanotechnology, and biological and medical sciences. A critical review of the state of the art for the adsorption capabilities of porous materials is therefore needed both for a fundamental understanding of the phenomena and applications of porous materials’ adsorption. This Special Issue will cover both the fundamental science and cutting-edge technology of the adsorption phenomenon by porous materials. We will also discuss this topic from theoretical and experimental perspectives. The size of pores, the type of porous materials, surface areas, and the adsorbed molecules in terms of the adsorption performance will also be reviewed and analysed.

Dr. Wei Wu
Guest Editor

Manuscript Submission Information

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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.

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Keywords

  • adsorption
  • physio-sorption
  • chemisorption
  • porous materials
  • mesopores
  • micropores
  • surface area
  • molecules
  • environmental science
  • nano-science
  • nanotechnology
  • biological science
  • medical science

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Published Papers (1 paper)

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Research

18 pages, 4194 KiB  
Article
Study of the Process of Sorption of Iron and Copper from Sulfuric Acid in Their Joint Presence by Natural Zeolite
by Raushan Kaiynbayeva, Raissa Chernyakova, Gita Sultanbayeva, Nazym Kozhabekova, Umirzak Jussipbekov and Ersin Tussupkaliyev
Crystals 2025, 15(6), 494; https://doi.org/10.3390/cryst15060494 - 22 May 2025
Abstract
The most promising method for the purification of concentrated technical sulfuric acid is the purification sorption method, which is the most effective and innovative, using a natural sorbent. Study of the process of sorption of iron and copper cations from concentrated technical sulfuric [...] Read more.
The most promising method for the purification of concentrated technical sulfuric acid is the purification sorption method, which is the most effective and innovative, using a natural sorbent. Study of the process of sorption of iron and copper cations from concentrated technical sulfuric acid by a natural zeolite. The specific surface area of the zeolite isolated from reactive sulfuric acid is 4.781 m2/g. The true absorption volume in the zeolite after the purification of sulfuric acid decreases to a value of 147.0068 mL/g for a zeolite sample. The adsorption pore volume for the zeolite after the acid purification calculated from the obtained results is 0.229 mL/g. The physicochemical methods of analysis (NGR, IR, X-ray diffraction, DTA, porosimetry, electron microscopy) and chemical methods revealed that in concentrated sulfuric acid the Fe–O bonds of octahedrons and SiO bonds of tetrahedrons of the zeolite framework are stable. The sorption process was carried out under conditions of a room temperature of T = 25 °C, the ratio “zeolite: H2SO4” of 10:100, and a process time of 5–50 min. The specified concentration of the Fe and Cu cations was created by introducing the calculated amount of FeSO4·7H2O and CuSO4·5H2O, in order to identify the patterns of the sorption process of copper and iron in their joint presence (CFe > CCu; CFe = CCu). The regularities of sorption of iron and copper cations by zeolite in their joint presence on the model system “H2SO4–zeolite–Fe–Cu” were studied and selective sorption capacity of zeolite with respect to iron cations was revealed. The maximum degree of sorption of iron cations in concentrated sulfuric acid is achieved in 10–15 min and makes up 95% and that of copper 30.6%. The process of iron sorption from sulfuric acid occurs according to the types of ion isomorphism and ion exchange, as indicated by a very high number of sorbed Fe ions and the absence of their release (desorption) from the zeolite into the solution. The Cu cations are sorbed by zeolite from acid by the ion exchange method, which is confirmed by the physicochemical analysis methods. Full article
(This article belongs to the Special Issue Adsorption Capabilities of Porous Materials)
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