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Related Concept Videos

Ion Exchange01:17

Ion Exchange

600
Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or...
600
Dialysis01:15

Dialysis

709
Dialysis is a diffusion-based purification process that separates analyte molecules from a complex matrix. This is accomplished by allowing molecules in the solution to pass through a semipermeable membrane into a liquid on the other side. The membrane is usually made of cellulose acetate or cellulose nitrate, and the second liquid must be miscible with the solution. Ions (e.g., chloride or sodium) or organic molecules (e.g., glucose) can pass through the membrane pores, which generally have...
709

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Related Experiment Video

Updated: Jul 12, 2025

Proof-of-Concept for Gas-Entrapping Membranes Derived from Water-Loving SiO2/Si/SiO2 Wafers for Green Desalination
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Recent Advances in Layered-Double-Hydroxide-Based Separation Membranes.

Biao Li1, Xiaozhi Xu1, Zeya Yang1

  • 1State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 100029, Beijing, China.

Chempluschem
|October 28, 2023
PubMed
Summary
This summary is machine-generated.

Layered double hydroxides (LDHs) are promising two-dimensional materials for advanced membranes. Their unique properties enable precise nanochannel construction for effective gas separation, ion sieving, and nanofiltration applications.

Keywords:
gas separationion separationlayered double hydroxidesmembranewater purification

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Area of Science:

  • Materials Science
  • Chemical Engineering
  • Nanotechnology

Background:

  • Two-dimensional materials offer unique advantages for next-generation membrane development.
  • Layered double hydroxides (LDHs) are a key class of 2D materials with tunable properties.
  • LDHs possess atomic thinness, enabling precise nanochannel construction.

Purpose of the Study:

  • To review the latest advancements in using LDHs for membrane separation.
  • To summarize the fundamental properties and assembly strategies of LDH membranes.
  • To present the current research status and future prospects of LDH membranes.

Main Methods:

  • Review of recent literature on LDH membrane synthesis and applications.
  • Analysis of LDH material properties relevant to membrane performance.
  • Systematic categorization of LDH membrane applications in separation processes.

Main Results:

  • LDHs exhibit tunable interlayer anions for precise sub-nanometer pore size control.
  • Their inherent hydrophilicity and positive charge are beneficial for membrane functions.
  • LDH membranes have demonstrated effectiveness in gas separation, ion sieving, and nanofiltration.

Conclusions:

  • LDH membranes represent a significant advancement in separation technologies.
  • Further research is needed to address challenges in preparation and application.
  • Future prospects include optimizing LDH membranes for enhanced performance and broader utility.