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Related Concept Videos

Ionic Compounds: Formulas and Nomenclature03:34

Ionic Compounds: Formulas and Nomenclature

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.

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Related Experiment Video

Updated: Jun 21, 2026

An Efficient Method for Selective Desalination of Radioactive Iodine Anions by Using Gold Nanoparticles-Embedded Membrane Filter
07:28

An Efficient Method for Selective Desalination of Radioactive Iodine Anions by Using Gold Nanoparticles-Embedded Membrane Filter

Published on: July 13, 2018

Nano-structured calcium silicate hydrate functionalised with iodine.

Thomas Borrmann1, James H Johnston, Andrew J McFarlane

  • 1School of Chemical and Physical Sciences, Victoria University of Wellington, P.O. Box 600, 6140 Wellington, New Zealand. thomas.borrmann@vuw.ac.nz

Journal of Colloid and Interface Science
|August 18, 2009
PubMed
Summary
This summary is machine-generated.

Nano-structured calcium silicate hydrate can sorb and release iodine. This material offers controlled iodine release for medical and materials science applications, with a stable complex forming at higher temperatures.

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Area of Science:

  • Materials Science
  • Chemistry

Background:

  • Nano-structured calcium silicate hydrate exhibits iodine sorption capabilities.
  • Controlled iodine release is crucial for various medical and materials science applications.

Purpose of the Study:

  • To investigate the sorption and release mechanisms of iodine by nano-structured calcium silicate hydrate.
  • To characterize the iodine-calcium silicate hydrate complex formed at elevated temperatures.

Main Methods:

  • Sorption and desorption experiments using elemental iodine in solution, gas, or solid form.
  • Calorimetry to determine the formation energy of the iodine-calcium silicate hydrate complex.
  • X-ray photoelectron spectroscopy to investigate the nature of the complex.

Main Results:

  • Iodine sorption and desorption are quantitative and physical at ambient temperatures.
  • A stable iodine-calcium silicate hydrate complex forms above 32.5°C.
  • The formation energy of the complex is 41.8±0.8 kJ/mol.

Conclusions:

  • Nano-structured calcium silicate hydrate is a promising material for controlled iodine delivery.
  • The temperature-dependent sorption mechanism allows for tunable iodine release profiles.
  • The stable complex formation at higher temperatures has implications for material stability and application design.