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Related Concept Videos

Ionic Radii03:10

Ionic Radii

33.5K
Ionic radius is the measure used to describe the size of an ion. A cation always has fewer electrons and the same number of protons as the parent atom; it is smaller than the atom from which it is derived. For example, the covalent radius of an aluminum atom (1s22s22p63s23p1) is 118 pm, whereas the ionic radius of an Al3+ (1s22s22p6) is 68 pm. As electrons are removed from the outer valence shell, the remaining core electrons occupying smaller shells experience a greater effective nuclear...
33.5K
Ionic Bonds00:42

Ionic Bonds

130.8K
Overview
When atoms gain or lose electrons to achieve a more stable electron configuration they form ions. Ionic bonds are electrostatic attractions between ions with opposite charges. Ionic compounds are rigid and brittle when solid and may dissociate into their constituent ions in water. Covalent compounds, by contrast, remain intact unless a chemical reaction breaks them.
Opposing Charges Hold Ions Together in Ionic Compounds
Ionic bonds are reversible electrostatic interactions between ions...
130.8K
Molecular and Ionic Solids02:54

Molecular and Ionic Solids

20.1K
Crystalline solids are divided into four types: molecular, ionic, metallic, and covalent network based on the type of constituent units and their interparticle interactions.
Molecular Solids
Molecular crystalline solids, such as ice, sucrose (table sugar), and iodine, are solids that are composed of neutral molecules as their constituent units. These molecules are held together by weak intermolecular forces such as London dispersion forces, dipole-dipole interactions, or hydrogen bonds, which...
20.1K
Solubility of Ionic Compounds02:55

Solubility of Ionic Compounds

68.2K
Solubility is the measure of the maximum amount of solute that can be dissolved in a given quantity of solvent at a given temperature and pressure. Solubility is usually measured in molarity (M) or moles per liter (mol/L). A compound is termed soluble if it dissolves in water.
68.2K
Ionic Crystal Structures02:42

Ionic Crystal Structures

17.0K
Ionic crystals consist of two or more different kinds of ions that usually have different sizes. The packing of these ions into a crystal structure is more complex than the packing of metal atoms that are the same size.
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
17.0K
Ionic Compounds: Formulas and Nomenclature03:34

Ionic Compounds: Formulas and Nomenclature

87.3K
An element composed of atoms that readily lose electrons (a metal) can react with an element composed of atoms that readily gain electrons (a nonmetal) to produce ions through complete electron transfer. The compound formed by this transfer is stabilized by the electrostatic attractions (ionic bonds) between the oppositely charged ions.
87.3K

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Related Experiment Video

Updated: Feb 3, 2026

Pretreatment of Lignocellulosic Biomass with Low-cost Ionic Liquids
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Pretreatment of Lignocellulosic Biomass with Low-cost Ionic Liquids

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Functionalized ionic liquid membranes for CO2 separation.

Hongshuai Gao1, Lu Bai, Jiuli Han

  • 1Beijing Key Laboratory of Ionic Liquids Clean Process, State Key Laboratory of Multiphase Complex System, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China. xpzhang@ipe.ac.cn.

Chemical Communications (Cambridge, England)
|October 26, 2018
PubMed
Summary
This summary is machine-generated.

Developing efficient carbon dioxide (CO2) separation technologies is crucial. Functionalized ionic liquid (IL) membranes show great promise for CO2 capture from various sources.

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Area of Science:

  • Chemical Engineering
  • Materials Science
  • Environmental Science

Background:

  • Carbon dioxide (CO2) separation is essential for mitigating climate change and purifying industrial gases.
  • Traditional CO2 separation methods face challenges in efficiency, reversibility, and cost.
  • Functionalized ionic liquids (ILs) offer unique properties for selective CO2 capture.

Purpose of the Study:

  • To review recent advancements in CO2 separation using functionalized IL membranes.
  • To highlight progress in the preparation, performance, and mechanisms of various IL-based membranes.
  • To discuss future prospects and research directions in this field.

Main Methods:

  • Review of supported IL membranes (SILMs).
  • Analysis of pure poly(ionic liquid) (PIL) membranes.
  • Examination of PIL-copolymer, PIL-IL composite, and polymer-IL composite membranes.

Main Results:

  • Functionalized IL membranes demonstrate significant potential for CO2 separation.
  • Various membrane configurations (SILMs, PILs, composites) exhibit promising separation performance.
  • Understanding the separation mechanisms is key to optimizing membrane design.

Conclusions:

  • Functionalized IL membranes are a highly promising technology for efficient CO2 separation.
  • Continued research into material design and mechanism elucidation will drive further improvements.
  • These membranes offer a viable pathway for economic and reversible CO2 capture.