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Updated: Aug 3, 2025
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Solution-Processed "Silver-Bismuth-Iodine" Ternary Thin Films for Lead-Free Photovoltaic Absorbers
Published on: September 27, 2018
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Two New 1D Supramolecular Compounds Based on PbI2 for Efficient Iodine Capture
Xingxing Zhang1, Jian Li1,2, Yunyin Niu1
1Green Catalysis Center, College of Chemistry, Zhengzhou University, Zhengzhou 450001, China.
Molecules (Basel, Switzerland)
|April 13, 2023
Summary
Two novel hybrid crystals were synthesized for efficient iodine capture. Compound 1 demonstrated a 96.59% adsorption rate in cyclohexane, showing potential as an excellent adsorbent.
Area of Science:
- Materials Science
- Inorganic Chemistry
- Supramolecular Chemistry
Background:
- Development of efficient adsorbents for iodine capture is crucial.
- Inorganic-organic hybrid crystals offer tunable properties for adsorption applications.
- Lead iodide (PbI2)-based materials are explored for their unique structural and chemical characteristics.
Purpose of the Study:
- To synthesize and characterize new inorganic-organic hybrid crystals for iodine adsorption.
- To investigate the adsorption performance, kinetics, and thermodynamics of the synthesized compounds.
- To elucidate the mechanism behind iodine adsorption and assess the recyclability of the adsorbent.
Main Methods:
- Solvent evaporation method for crystal synthesis.
- Single-crystal X-ray diffraction, elemental analysis, FT-IR, and powder X-ray diffraction for characterization.
- Adsorption experiments in cyclohexane solution, kinetic and thermodynamic analyses, and cyclic experiments.
Main Results:
- Two new hybrid crystals, {[L1]·[Pb2I6]}n (1) and {[L2]2·[Pb3I10]}n (2), were successfully synthesized using multivalent nitrogen-containing cationic ligands.
- Compound 1 exhibited a high iodine adsorption rate of 96.59% in cyclohexane solution.
- Adsorption followed pseudo-second-order kinetics and Langmuir thermodynamics, indicating chemisorption on a monolayer surface.
Conclusions:
- Compound 1 shows excellent iodine adsorption capacity and good recyclability, making it a promising adsorbent.
- The presence of amino, benzene, and N-heterocyclic groups in compound 1 enhances iodine adsorption.
- The synthesized inorganic-organic hybrid crystals have potential applications in future iodine capture technologies.
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