Indoor formaldehyde removal over CMK-3.

Area of Science:

• Environmental Science
• Materials Science
• Chemistry

Background:

• Indoor air pollution is a significant concern, with formaldehyde being a key indoor air pollutant.
• Effective removal of low-concentration formaldehyde is crucial for improving indoor air quality.

Purpose of the Study:

• To synthesize and evaluate mesoporous carbon materials for the adsorption of low-concentration indoor formaldehyde.
• To investigate the impact of surface activation on the formaldehyde adsorption performance of mesoporous carbon.

Main Methods:

• Mesoporous carbon material CMK-3 was synthesized using SBA-15 as a template via nano-replication.
• CMK-3 was activated with sulfuric acid (CMK-3-H2SO4) and ammonia gas (CMK-3-NH3).
• Materials were characterized using N2 adsorption-desorption, X-ray diffraction, and X-ray photoelectron spectroscopy.

Main Results:

• The formaldehyde adsorption performance followed the order: CMK-3-NH3 > CMK-3-H2SO4 > CMK-3.
• Surface activation introduced oxygen and nitrogen functional groups, influencing adsorption capacity.
• Specific surface area and pore structure were identified as key factors affecting formaldehyde adsorption.

Conclusions:

• Activated mesoporous carbon, particularly CMK-3-NH3, shows high efficiency in removing low-concentration formaldehyde.
• Surface functionalization and tailored pore structures are critical for enhancing adsorbent performance.
• These materials offer a viable strategy for mitigating indoor formaldehyde pollution.