Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 10, Issue 9, Pages 8066-8076Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b19519
Keywords
formaldehyde adsorption; carbon textiles; nanopores; surface chemistry; reactivity; S- and N-doped carbon surface
Funding
- Polish-American Fulbright Commission
- PhD Course in Chemical Sciences (University of Naples, Italy)
- Short Term Mobility Program of IRC-CNR [CUP B53C17001430005]
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Highly porous carbon textiles were modified by impregnation with urea, thiourea, dicyandiamide, or penicillin G, followed by heat treatment at 800 degrees C. This resulted in an incorporation of nitrogen or nitrogen and sulfur heteroatoms in various configurations to the carbon surface. The volume of pores and, especially, ultramicropores was also affected to various extents. The modified textiles were then used as adsorbents of formaldehyde (1 ppmv) in dynamic conditions. The modifications applied significantly improved the adsorptive performance. For the majority of samples, formaldehyde adsorption resulted in a decrease in the volume of ultramicropores. The enhancement in the adsorption was linked not only to the physical adsorption of formaldehyde in small pores but also to its reactivity with sulfonic groups and amines present on the surface. Water on the surface and in challenge gas decreased the adsorptive performance owing to the competition with formaldehyde for polar centers. The results collected show that the S- and N-modified textiles can work as efficient media for indoor formaldehyde removal.
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