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Related Concept Videos

Redox Titration: Iodimetry and Iodometry01:23

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Iodometry and iodimetry are analytical methods used to determine the concentration of oxidizing or reducing agents using iodine. In iodometric titrations, the oxidizing analyte solution is usually acidified and treated with an excess of iodide ions, which generates an equivalent amount of iodine in equilibrium with triiodide. The released iodine is subsequently titrated directly against a standardized reducing agent. As the dilute iodine color becomes pale yellow, a few drops of freshly...
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Redox Titration: Other Oxidizing and Reducing Agents01:26

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Besides iodine, other oxidizing or reducing agents can serve as titrants in redox titrations. Common oxidizing titrants include KMnO4, cerium(IV), and K2Cr2O7. The choice of oxidizing titrants depends on factors like stability, cost, analyte strength, and reaction rate between the analyte and titrant. KMnO4 is a strong oxidizing titrant that reduces from Mn(VII) to Mn(II) in a highly acidic solution, simultaneously oxidizing the analyte to a higher oxidation state. In this case, KMnO4 acts as a...
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Related Experiment Video

Updated: Jan 8, 2026

An Efficient Method for Selective Desalination of Radioactive Iodine Anions by Using Gold Nanoparticles-Embedded Membrane Filter
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Redox-Active Antimony Sulfide Frameworks for Dynamic Radioiodine Capture.

Fu Peng1, Linwei He1, Ruwei Chen2

  • 1State Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection, Collaborative Innovation Center of Radiological Medicine of Jiangsu Higher Education Institutions, Soochow University, Suzhou 215123, China.

ACS Applied Materials & Interfaces
|December 12, 2025
PubMed
Summary
This summary is machine-generated.

New antimony sulfide frameworks efficiently capture radioactive iodine, crucial for nuclear safety. The 3D framework shows superior performance in dynamic conditions, outperforming existing materials for environmental protection.

Keywords:
antimony sulfide frameworksbreakthrough experimentsiodine adsorptionradioactive hot-testingredox-active

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Area of Science:

  • Materials Science
  • Environmental Chemistry
  • Nuclear Engineering

Background:

  • Efficient radioactive iodine capture is vital for nuclear safety and environmental protection, especially under challenging high-temperature off-gas conditions.
  • Existing methods face limitations in dynamic and high-temperature environments, necessitating novel adsorbent materials.

Purpose of the Study:

  • To evaluate the iodine removal performance of two antimony sulfide frameworks (2D and 3D) under dynamic, high-temperature conditions.
  • To compare the performance of the 3D antimony sulfide framework against benchmark adsorbents for radioactive iodine capture.

Main Methods:

  • Systematic evaluation of static and dynamic iodine uptake capacities of 2D and 3D Sb2S3 frameworks.
  • Radioactive dynamic adsorption setup using 131I2 to confirm application potential.
  • Mechanism analysis using powder X-ray diffraction, X-ray photoelectron spectroscopy, and time-dependent Raman spectroscopy.

Main Results:

  • Both 2D and 3D Sb2S3 frameworks showed modest static iodine uptake.
  • The 3D Sb2S3 framework achieved a superior dynamic capacity (1.25 g g-1 at 373 K), outperforming SCU-SnS (0.88 g g-1) and Ag-loaded silica gel (0.54 g g-1).
  • Mechanism analysis revealed iodine uptake via charge-transfer interactions and redox-induced SbI3 formation.

Conclusions:

  • The 3D antimony sulfide framework demonstrates significant potential for advanced radioactive iodine capture in nuclear waste management.
  • The study introduces a new design paradigm for redox-active metal sulfide adsorbents utilizing soft acid/base interactions and framework reactivity.
  • This research offers a viable approach for enhancing nuclear safety and environmental protection through improved iodine removal technologies.