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Bifunctional Covalent Organic Framework for Efficient Iodine Capture and High-Performance Energy Storage
Shubham Kumar1, Nakul Desai2, Bharatkumar Z Dholakiya1
1Department of Chemistry, Sardar Vallabhbhai National Institute of Technology, Ichchanath, Surat-395007, Gujarat, India.
Langmuir : the ACS Journal of Surfaces and Colloids
|September 17, 2025
Summary
A novel nitrogen-rich covalent organic framework (TPATFB-COF) demonstrates dual functionality for efficient iodine capture and high-performance supercapacitors. This stable material offers promising solutions for nuclear waste management and advanced energy storage applications.
Area of Science:
- Materials Science
- Nanotechnology
- Electrochemistry
Background:
- Covalent organic frameworks (COFs) are emerging porous materials with tunable properties.
- Nitrogen-rich materials are of interest for adsorption and energy storage applications.
- Developing dual-functional materials can lead to efficient solutions for environmental and energy challenges.
Purpose of the Study:
- To synthesize and characterize a nitrogen-rich triazine-based covalent organic framework (TPATFB-COF).
- To investigate the potential of TPATFB-COF for iodine capture applications.
- To evaluate the performance of TPATFB-COF in supercapacitor devices.
Main Methods:
- Synthesis of TPATFB-COF via condensation of TPA and TFB.
- Characterization of the COF's structure, stability, and properties.
- Testing iodine adsorption capacity across various phases and conditions.
- Fabrication and electrochemical testing of supercapacitors using TPATFB-COF.
Main Results:
- TPATFB-COF exhibits exceptional iodine uptake capacities: 5.9 g g-1 (vapor, 75 °C), 2.28 g g-1 (vapor, 25 °C), 1.6 g g-1 (organic, 25 °C), and 3.9 g g-1 (aqueous, 25 °C).
- The material demonstrates excellent recyclability and stability for iodine capture.
- Supercapacitors fabricated with TPATFB-COF achieve high specific capacitances (455 F g-1), energy density (63.19 Wh kg-1), and power density (2500 W kg-1).
- The supercapacitor device shows remarkable cycling stability, retaining 90% capacitance over 10,000 cycles with 95% Coulombic efficiency.
Conclusions:
- TPATFB-COF is a highly stable, nitrogen-rich material with significant potential for both iodine capture and advanced energy storage.
- The dual functionality of TPATFB-COF offers a promising pathway for addressing nuclear waste management and supercapacitor technology.
- This research highlights the versatility of covalent organic frameworks in developing sustainable and high-performance materials.
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