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Ultrahigh-surface-area activated carbon aerogels derived from glucose for high-performance organic pollutants adsorption.
- Source :
-
Journal of Colloid & Interface Science . Jun2019, Vol. 546, p333-343. 11p. - Publication Year :
- 2019
-
Abstract
- Herein, carbon aerogels (CA) were prepared by a facile and eco-friendly approach from glucose, an abundant and inexpensive sugar molecule, and further activated by potassium hydroxide. An interconnected coral-like microstructure of carbon was built up in sol–gel process, and activation process resulted in a more efficient development of microporosity and mesoporosity. Thus, activated carbon aerogels (ACA) with specific surface area up to 2413 m2·g−1 were obtained. The unique morphology, ultrahigh specific surface area, and increased functional groups rendered the obtained ACA superior adsorption capacity (194.07–1030.05 mg·g−1) for several kinds of organic pollutants, such as phenols (phenol, p -nitrophenol and resorcinol), antibiotics (tetracycline, oxytetracycline, doxycycline and sulfamethazine), and dyes (methylene blue). Among them, the adsorption of p -nitrophenol onto ACA could reach 613.34 mg·g−1 (293 K) and had a broad pH application range from 2 to 10 with good regeneration ability. The adsorption kinetics studies implied that intraparticle diffusion and pore diffusion were the limiting steps of the adsorption rate. Adsorption isotherms showed that the interaction between p -nitrophenol and ACA surface was monolayer adsorption. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00219797
- Volume :
- 546
- Database :
- Academic Search Index
- Journal :
- Journal of Colloid & Interface Science
- Publication Type :
- Academic Journal
- Accession number :
- 136271764
- Full Text :
- https://doi.org/10.1016/j.jcis.2019.03.076