Functional Materials in Adsorption and Separation

A Special Issue of Separations (ISSN 2297-8739) belonging to the section "Materials in Separation Science".

Deadline for manuscript submissions: 10 November 2026 | Viewed by 657

Editor

Xinjiang Key Laboratory of Separation Material and Technology, The Xinjiang Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Urumqi 830011, China
Interests: gas adsorption and separation; oil–water separation; air filtration; pollutant removal; porous materials

Special Issue Information

Dear Colleagues,

This Special Issue, entitled "Functional Materials in Adsorption and Separation," aims to highlight recent advances in the design, synthesis, and application of functional materials for adsorption and separation processes. With growing concerns over environmental pollution and resource recovery, the development of efficient and selective adsorbents and separation materials has become increasingly important. This Special Issue will cover a broad range of topics, including, but not limited to, the following: porous materials, nanocomposites, and polymers, with applications in gas separation, water purification, and other newly emerged pollutant removal. We welcome original research articles and reviews that address both fundamental studies and practical applications, providing a platform for researchers to share innovative strategies and solutions in this rapidly evolving field.

We look forward to receiving your contributions.

Dr. Hui Li
Guest Editor

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Keywords

  • adsorption
  • separation
  • functional materials
  • air purification
  • porous materials
  • environmental remediation
  • gas separation
  • water treatment

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Published Papers (1 paper)

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Research

14 pages, 16130 KB  
Article
Identifying Accessible Ag+ Sites as the Key Active Sites Governing Xenon Capture in Ag-Exchanged FAU Zeolite
by Yuqiang Sheng, Yongzhen Zhang, Shujiang Liu, Zhanying Chen, Di Liu and Shilian Wang
Separations 2026, 13(9), 266; https://doi.org/10.3390/separations13090266 - 17 Sep 2026
Viewed by 113
Abstract
To address the challenge of identifying the true structure–performance relationship governing xenon adsorption in silver-exchanged zeolites, a series of Ag/13X adsorbents with tunable silver loadings were synthesized via liquid-phase ion exchange. The unique FAU-type topology of 13X zeolite, composed of spacious supercages interconnected [...] Read more.
To address the challenge of identifying the true structure–performance relationship governing xenon adsorption in silver-exchanged zeolites, a series of Ag/13X adsorbents with tunable silver loadings were synthesized via liquid-phase ion exchange. The unique FAU-type topology of 13X zeolite, composed of spacious supercages interconnected by large 12-membered-ring windows, enables high silver dispersion while minimizing diffusion limitations. This unique structural advantage makes Ag/13X an ideal model system for investigating the intrinsic role of silver active sites in Xe adsorption. We identify a pronounced volcano-shaped dependence of Xe adsorption on silver loading, establishing that total silver content is not the governing factor for Xe capture. Combined structural characterization and spectroscopic analyses reveal that increasing silver loading continuously alters silver speciation from highly dispersed Ag+ ions toward more aggregated silver species, which may reduce the fraction of accessible Ag+-related adsorption sites and simultaneously modify the local electronic environment of silver species. At an optimal AgNO3 exchange concentration of 0.5 M, the predominance of well-dispersed Ag+ species maximizes accessible active-site density and leads to the highest Xe uptake. Charge-corrected GCMC simulations provide molecular-level validation by showing that these accessible Ag+ sites reinforce Xe adsorption through stronger ion-induced dipole interactions. Consequently, this work identifies the density of accessible Ag+ sites as an important descriptor for Xe capture, offering a design guideline for engineering high-efficiency noble-gas adsorbents. Full article
(This article belongs to the Special Issue Functional Materials in Adsorption and Separation)
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