Oriented 1D Metal-Organic Frameworks for Selective Chemisorption by a Substitution-Insertion Mechanism

Area of Science:

• Materials Science
• Chemical Engineering
• Environmental Science

Background:

• Chemisorption using organometallic-based adsorbents is vital for separating and purifying chemical systems.
• Developing advanced adsorbents with high capacity and selectivity is an ongoing challenge.

Purpose of the Study:

• To fabricate and characterize oriented 1D NH2-CuBDC·H2O metal-organic frameworks (MOFs).
• To evaluate the MOFs' performance as a phase-change chemosorbent for ammonia (NH3) capture and bioethanol dehydration.
• To assess the cost-effectiveness and recyclability of the developed MOFs.

Main Methods:

• Bottom-up interfacial polymerization was employed to synthesize oriented 1D NH2-CuBDC·H2O MOFs.
• The MOFs' coordination-responsive characteristics were investigated.
• Ammonia (NH3) capture capacity and bioethanol dehydration efficiency were measured.
• Regeneration of the MOFs was performed using water washing.

Main Results:

• The synthesized MOFs exhibited accessible CuII sites and coordination-responsive properties.
• Unprecedented NH3 capture capacity of 18.83 mmol g-1 at 298 K was achieved.
• Efficient bioethanol dehydration was demonstrated, enriching ethanol from 99% to 99.99% in 10 minutes.
• The MOFs were easily regenerated with water washing at room temperature.

Conclusions:

• The developed 1D MOFs are highly effective and versatile chemosorbents for NH3 capture and bioethanol dehydration.
• The inexpensive raw materials, facile synthesis, and efficient regeneration make these MOFs a valuable and sustainable adsorbent.
• This work presents a promising adsorbent for targeted substance removal and separation with minimal energy consumption and cost.