期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 546, 期 -, 页码 333-343出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2019.03.076
关键词
Activated carbon aerogels; Adsorption; Organic pollutants; p-nitrophenol
资金
- National Natural Science Foundation of China [21773129, 21811530274, 91545126, 31200396]
- Natural Science Foundation of Tianjin [14JCQNJC08500]
- National Key Research and Development Program [2016YFC0400706]
- 111 program, Ministry of Education, China [T2017002]
- Fundamental Research Funds for the Central Universities
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 m(2).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. (C) 2019 Elsevier Inc. All rights reserved.
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