Nanostructured Carbon-Doped BN for CO₂ Capture Applications

Area of Science:

• Materials Science
• Nanotechnology
• Chemical Engineering

Background:

• Developing advanced materials for gas separation is crucial.
• Carbon-doped boron nitride (BN/C) offers potential due to its unique properties.
• Existing synthesis methods can be complex and costly.

Purpose of the Study:

• To synthesize nanostructured carbon-doped boron nitride (BN/C) materials.
• To evaluate the CO2 sorption performance and selectivity of the synthesized BN/C.
• To demonstrate a simple and effective bottom-up synthesis approach.

Main Methods:

• Pyrolysis of a nanostructured mixture of alkyl amine borane adduct and ammonia borane at 1100 °C.
• Utilizing alkyl amine borane adduct as a soft template for nanosphere formation.
• Characterization of material properties including porosity and surface area via gas sorption (CO2, N2).

Main Results:

• Successfully synthesized microporous BN/C nanospheres with interconnected pores (0.8 nm).
• Achieved a high specific surface area (up to 767 m²·g⁻¹) and pore volume (0.32 cm³·g⁻¹).
• Demonstrated significant CO2 uptake (3.43 mmol·g⁻¹ at 0 °C), high CO2/N2 selectivity (21), and excellent recyclability (99% over five cycles).

Conclusions:

• The bottom-up synthesis approach is effective for creating nanostructured BN/C materials.
• The synthesized BN/C exhibits promising performance for CO2 capture and separation.
• The material's stability and recyclability suggest practical applicability in gas sorption technologies.