Covalent Triazine Frameworks via a Low-Temperature Polycondensation Approach.

Area of Science:

• Materials Science
• Chemical Engineering
• Nanotechnology

Background:

• Traditional ionothermal synthesis of covalent triazine frameworks (CTFs) involves harsh conditions.
• These conditions limit structural diversity and hinder large-scale CTF production.

Purpose of the Study:

• To develop a new, mild polycondensation strategy for synthesizing CTFs.
• To explore the structural properties and potential applications of the newly synthesized CTFs.

Main Methods:

• A polycondensation approach was employed for CTF synthesis under mild conditions.
• The synthesized CTFs (CTF-HUSTs) were characterized for their structure and properties.
• Scalability of the synthesis was assessed, reaching gram quantities.

Main Results:

• Layered CTF structures were successfully synthesized using the new method.
• The CTFs demonstrated potential in separations, photocatalysis, and energy storage.
• CTF-HUSTs exhibited a maximum photocatalytic hydrogen evolution rate of 2647 μmol h⁻¹ g⁻¹ under visible light.
• A pyrolyzed CTF-HUST-4 anode material achieved a discharge capacity of 467 mAh g⁻¹ in a sodium-ion battery.

Conclusions:

• The polycondensation approach offers a versatile and mild route to CTFs.
• CTF-HUSTs are promising materials for photocatalytic hydrogen production and sodium-ion battery anodes.