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Stimuli-Responsive Ion Adsorbents for Sustainable Separation Applications
Nicole Li1, Jue Hou1, Ranwen Ou2
1Chemical and Environmental Engineering, School of Engineering, RMIT University, Melbourne, Victoria 3000, Australia.
ACS Nano
|September 11, 2023
Summary
Stimuli-responsive ion absorbents offer sustainable separation by reversibly adsorbing and desorbing ions. These materials enable chemical-free regeneration, paving the way for eco-friendly water treatment and resource recovery.
Area of Science:
- Materials Science
- Environmental Science
- Chemical Engineering
Background:
- Stimuli-responsive ion absorbents (SRIAs) are gaining attention for sustainable separation due to reversible ion adsorption/desorption.
- SRIAs respond to various stimuli (pH, gas, temperature, light, magnetic, voltage) for enhanced adsorption and selectivity.
- Unlike traditional adsorbents, SRIAs offer reduced or chemical-free regeneration, promoting eco-friendly and energy-efficient technologies.
Purpose of the Study:
- To systematically review materials and strategies for synthesizing single-, dual-, and multiresponsive ion adsorbents.
- To discuss the fundamental mechanisms governing adsorption/desorption under external stimuli.
- To explore the application of SRIAs in water desalination, toxic ion removal, and valuable ion recovery.
Main Methods:
- Literature review of stimuli-responsive ion adsorbent synthesis.
- Analysis of adsorption and desorption mechanisms under various stimuli.
- Evaluation of regeneration capacities and applications in sustainable separation.
Main Results:
- Overview of diverse SRIAs with single, dual, and multi-stimuli responsiveness.
- Detailed discussion of mechanisms driving ion adsorption and desorption.
- Assessment of SRIAs for water desalination, toxic ion removal, and ion recovery.
Conclusions:
- SRIAs present a promising approach for sustainable separation technologies.
- Challenges in development and deployment exist, but strategies for overcoming them are discussed.
- Future prospects highlight the potential of multifunctional responsive ion adsorbents.
Keywords:
adsorptiondesorption and regenerationion adsorbentsion extraction and recoverystimuli-responsivesustainable separationwater desalinationwater treatmentMore Related Videos
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