Ultrahigh-surface-area activated carbon aerogels derived from glucose for high-performance organic pollutants adsorption

被引:79
|
作者
Li, Kerui [1 ]
Zhou, Minghua [1 ]
Liang, Liang [1 ]
Jiang, Lili [1 ]
Wang, Wei [1 ]
机构
[1] Nankai Univ, Coll Environm Sci & Engn, Minist Educ, Key Lab Pollut Proc & Environm Criteria, Tianjin 300350, Peoples R China
基金
中国国家自然科学基金;
关键词
Activated carbon aerogels; Adsorption; Organic pollutants; p-nitrophenol; AQUEOUS-SOLUTIONS; METHYLENE-BLUE; P-NITROPHENOL; EFFICIENT ADSORPTION; ENHANCED ADSORPTION; GRAPHENE OXIDE; POROUS CARBON; WASTE-WATER; REMOVAL; TETRACYCLINE;
D O I
10.1016/j.jcis.2019.03.076
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
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.
引用
收藏
页码:333 / 343
页数:11
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