Adsorption of ciprofloxacin, bisphenol and 2-chlorophenol on electrospun carbon nanofibers: In comparison with powder activated carbon
Adsorption of ciprofloxacin, bisphenol and 2-chlorophenol on electrospun carbon nanofibers: In comparison with powder activated carbon
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静电纺碳纳米纤维对环丙沙星、双酚和2-氯酚的吸附：与粉末活性炭的比较
DOI：
10.1016/j.jcis.2015.01.042
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发表时间：
2015-06-01
影响因子：
9.9
通讯作者：
Gao, Jinsuo
中科院分区：
文献类型：
--
作者：
Li, Xiaona;Chen, Shuo;Gao, Jinsuo
以聚丙烯腈（PAN）为原料，采用静电纺丝法制备了碳纳米纤维（CNFs）。首次探讨了稳定化过程对碳纳米纤维结构性质的影响，以提高碳纳米纤维对水溶液中环境污染物的吸附能力。研究了具有高比表面积（2326 m2/g）和微孔/介孔结构特征的静电纺碳纳米纤维对环丙沙星（CIP）、双酚（BPA）和2-氯苯酚（2-CP）3种有机物的吸附性能。并与商品粉末活性炭（PAC）的吸附性能进行了比较。吸附动力学和吸附等温线表明，CNFs对3种污染物的最大吸附量（q（m））顺序为CIP > BPA > 2-CP，分别是PAC的2.6倍（CIP）、1.6倍（BPA）和1.1倍（2-CP）。据推测，CNFs的微孔/介孔结构，污染物的分子尺寸和电子相互作用发挥重要作用的CNFs表现出的高吸附容量。此外，静电相互作用和疏水相互作用也有助于碳纳米纤维的吸附。本研究表明，静电纺丝碳纳米纤维是一种很有前途的吸附剂，用于去除水溶液中的污染物。(C)2015爱思唯尔公司All rights reserved.
Carbon nanofibers (CNFs) were prepared by electrospun polyacrylonitrile (PAN) polymer solutions followed by thermal treatment. For the first time, the influence of stabilization procedure on the structure properties of CNFs was explored to improve the adsorption capacity of CNFs towards the environmental pollutants from aqueous solution. The adsorption of three organic chemicals including ciprofloxacin (CIP), bisphenol (BPA) and 2-chlorophenol (2-CP) on electrospun CNFs with high surface area of 2326 m(2)/g and micro/mesoporous structure characteristics were investigated. The adsorption affinities were compared with that of the commercial powder activated carbon (PAC). The adsorption kinetics and isotherms showed that the maximum adsorption capacities (q(m)) of CNFs towards the three pollutants are sequenced in the order of CIP > BPA > 2-CP, which are 2.6-fold (CIP), 1.6-fold (BPA) and 1.1-fold (2-CP) increase respectively in comparison with that of PAC adsorption. It was assumed that the micro/mesoporous structure of CNFs, molecular size of the pollutants and the it electron interaction play important roles on the high adsorption capacity exhibited by CNFs. In addition, electrostatic interaction and hydrophobic interaction also contribute to the adsorption of CNFs. This study demonstrates that the electrospun CNFs are promising adsorbents for the removal of pollutants from aqueous solutions. (C) 2015 Elsevier Inc. All rights reserved.