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Related Concept Videos

Common Ion Effect03:24

Common Ion Effect

46.0K
Compared with pure water, the solubility of an ionic compound is less in aqueous solutions containing a common ion (one also produced by dissolution of the ionic compound). This is an example of a phenomenon known as the common ion effect, which is a consequence of the law of mass action that may be explained using Le Châtelier’s principle. Consider the dissolution of silver iodide:
46.0K
Precipitation of Ions03:11

Precipitation of Ions

30.0K
Predicting Precipitation
The equation that describes the equilibrium between solid calcium carbonate and its solvated ions is:
30.0K
Ion Channels01:19

Ion Channels

91.2K
The movement of ions like sodium, potassium, and calcium into and out of the cell is essential to maintain the electrochemical gradient in living cells. The ion channels—a class of membrane transport proteins—help maintain this ionic gradient for the smooth functioning of physiological activities such as maintaining cell size and volume, conducting nerve impulses, and gas and nutrient exchange.
Ion channels are specialized integral membrane proteins on the plasma membrane that allow...
91.2K
Formation of Complex Ions03:45

Formation of Complex Ions

25.8K
A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...
25.8K
Ions and Ionic Charges03:27

Ions and Ionic Charges

78.7K
In ordinary chemical reactions, the nucleus — which contains the protons and neutrons of each atom and thus identifies the element — remains unchanged. Electrons, however, can be added to atoms by transfer from other atoms, lost by transfer to other atoms, or shared with other atoms. The transfer and sharing of electrons among atoms govern the chemistry of the elements. During the formation of some compounds, atoms gain or lose electrons to form electrically charged particles called...
78.7K
Ions as Acids and Bases02:54

Ions as Acids and Bases

26.2K
Salts with Acidic Ions
Salts are ionic compounds composed of cations and anions, either of which may be capable of undergoing an acid or base ionization reaction with water. Aqueous salt solutions, therefore, may be acidic, basic, or neutral, depending on the relative acid-base strengths of the salt’s constituent ions. For example, dissolving the ammonium chloride in water results in its dissociation, as described by the equation:
26.2K

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Related Experiment Video

Updated: Jan 22, 2026

Biomimetic Materials to Characterize Bacteria-host Interactions
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Biomimetic Materials to Characterize Bacteria-host Interactions

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Biomimetic Nanocones that Enable High Ion Permselectivity.

Muhammad A Shehzad1,2, Yaoming Wang1, Aqsa Yasmin1,2

  • 1CAS Key Laboratory of Soft Matter Chemistry, Collaborative Innovation Centre of Chemistry for Energy Materials, Department of Applied Chemistry, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, 230026, China.

Angewandte Chemie (International Ed. in English)
|July 11, 2019
PubMed
Summary

Researchers developed scalable, charged nanocone membranes for ultra-fast ion transport. These biomimetic channels show high selectivity, overcoming challenges in desalination and industrial wastewater treatment.

Keywords:
biomimetic nanoconescation permselective membranesion-selective transportmembranespolyaniline

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Chemical Engineering

Background:

  • Biomimetic channels offer potential for selective ion and biomolecule transport.
  • Industrial applications like desalination and wastewater treatment face challenges with current biomimetic channel technology.

Purpose of the Study:

  • To develop readily scalable, ionically conductive biomimetic charged nanocone pores.
  • To enhance cation permeation and selectivity for industrial applications.

Main Methods:

  • A monomer seeding approach was used to grow charged nanocone pores on an acid-functionalized membrane.
  • Ion permeation and selectivity were measured for different cations (Na+, Mg2+).

Main Results:

  • The nanocone membranes exhibited ultra-fast cation permeation (Na+ 8.4×, Mg2+ 1.4×).
  • High ion charge selectivity was achieved (Na+/Mg2+ = 6×) compared to commercial membranes.
  • Negligible surface resistance and positively charged pore walls contributed to performance.

Conclusions:

  • The developed nanocone membranes offer a scalable solution for high-performance ion separation.
  • These biomimetic channels show promise for challenging industrial applications such as desalination and wastewater treatment.