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Related Concept Videos

Ion Exchange01:17

Ion Exchange

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 basic...
Types of Reversible Electrodes01:24

Types of Reversible Electrodes

For electrode reversibility to be maintained, all the reactants and products involved in the half-reaction must be present at the electrode. There are several types of reversible electrodes (half-cells).In metal-metal-ion electrodes, a metal balances electrochemically with a solution of its own ions. Examples are Cu2+|Cu and Zn2+|Zn. Metals that react with the solvent, like group 1 and most group 2 metals, which react with water, and zinc, which reacts with aqueous acidic solutions, cannot be...
Ion-Exchange Chromatography01:09

Ion-Exchange Chromatography

Ion-exchange chromatography, or IEC, is a technique for separating ions based on their affinity for the stationary phase. The stationary phase is a cross-linked polymer resin with covalently attached ionic functional groups. The functional groups can be either positively charged (cation exchangers) or negatively charged (anion exchangers). A cation exchanger consists of a polymeric anion and active cations, while an anion exchanger is a polymeric cation with active anions. The choice of...
Size-Exclusion Chromatography01:08

Size-Exclusion Chromatography

In size-exclusion chromatography (SEC), also known as molecular-exclusion or gel-permeation chromatography, molecules are separated based on their sizes. This technique is important for separating large molecules such as polymers and biomolecules. The two classes of micron-sized stationary phases encountered in SEC are silica particles and cross-linked polymer resin beads. Both materials are porous, but their pore sizes vary significantly.
Silica particles offer advantages such as rigidity,...
Extraction: Advanced Methods00:56

Extraction: Advanced Methods

Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is formed in...

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Related Experiment Video

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Synthesis and Performance Evaluations of ZnCoS/ZnCdS with Twin Crystal Structure for Multifunctional Redox Photocatalysis in Energy Applications
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Ion-exchangeable cobalt polysulfide chalcogel.

Maryam Shafaei-Fallah1, Jiaqing He, Alexander Rothenberger

  • 1Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States.

Journal of the American Chemical Society
|January 11, 2011
PubMed
Summary
This summary is machine-generated.

Researchers developed novel polychalcogenide aerogels using synthetic chalcogel chemistry. These materials exhibit ion-exchange properties and a high surface area, advancing inorganic materials science.

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Synthesis and Performance Evaluations of ZnCoS/ZnCdS with Twin Crystal Structure for Multifunctional Redox Photocatalysis in Energy Applications
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Combining Solid-state and Solution-based Techniques: Synthesis and Reactivity of Chalcogenidoplumbates(II or IV)
10:42

Combining Solid-state and Solution-based Techniques: Synthesis and Reactivity of Chalcogenidoplumbates(II or IV)

Published on: December 29, 2016

Area of Science:

  • Materials Science
  • Inorganic Chemistry
  • Nanotechnology

Background:

  • Chalcogels are a class of materials with unique properties.
  • Synthetic approaches to chalcogels are continuously being explored.
  • Developing materials with ion-exchange capabilities is crucial for various applications.

Purpose of the Study:

  • To develop a versatile synthetic approach for polychalcogenide aerogels.
  • To demonstrate the ion-exchange properties of these novel aerogels.
  • To characterize the structural properties, including pore size and surface area.

Main Methods:

  • Synthetic chalcogel chemistry was employed.
  • Polychalcogenide aerogels were synthesized using cobalt polysulfide as an example.
  • Materials were characterized for pore size distribution and surface area.

Main Results:

  • A promising synthetic approach for polychalcogenide aerogels was established.
  • Cobalt polysulfide polychalcogenide aerogels with ion-exchange properties were successfully synthesized.
  • The new materials exhibited a broad range of pore sizes and a high surface area of 483 m²/g.

Conclusions:

  • The presented synthetic strategy is extendable to a wide range of inorganic spacers.
  • These polychalcogenide aerogels represent a new class of functional materials.
  • The high surface area and ion-exchange properties suggest potential applications in areas like catalysis and separation.