Effective adsorption of sulfamethoxazole, bisphenol A and methyl orange on nanoporous carbon derived from metal-organic frameworks
Effective adsorption of sulfamethoxazole, bisphenol A and methyl orange on nanoporous carbon derived from metal-organic frameworks
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金属有机骨架纳米孔碳有效吸附磺胺甲恶唑、双酚A和甲基橙
DOI：
10.1016/j.jes.2017.10.019
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发表时间：
2018-01-01
影响因子：
6.9
通讯作者：
You, Shijie
中科院分区：
文献类型：
--
作者：
Li, Xiaona;Yuan, Hui;You, Shijie
由金属有机框架（MOF）衍生的纳米多孔碳（NPC）凭借其高比表面积、大孔体积和独特的孔隙率而在许多领域引起越来越多的关注。目前的工作报道了通过直接碳化MOF-5制备具有高表面积（1731 m(2)/g）和孔体积（1.68 cm(3)/g）的NPC。我们研究了水溶液中三种典型污染物的吸附，即。例如，磺胺甲恶唑 (SMX)、双酚 A (BPA) 和甲基橙 (MO)，通过使用所制备的 NPC。结果表明，NPC能够有效吸附污染物，吸附容量（qm）分别为625 mg/g（SMX）、757 mg/g（BPA）和872 mg/g（MO）。这些值比相同条件下单壁碳纳米管 (SWCNT) 和商业粉末活性炭 (PAC) 获得的值高约 1.0-3.2 倍。凭借其高表面积和独特的介孔/大孔结构，NPC的增强吸附很可能源自孔填充机制、静电相互作用和氢键的协同相互作用。特别是，pH 值对吸附具有至关重要的影响，表明 NPC 与污染物之间的静电相互作用具有显着贡献。这项研究提供了 MOF 衍生的纳米多孔碳作为水处理污染物的有效吸附剂的概念验证。 (C) 2017 中国科学院生态环境研究中心。由 Elsevier B.V. 出版
Nanoporous carbons (NPCs) derived from metal-organic frameworks (MOFs) are attracting increasing attention inmany areas by virtue of their high specific surface area, large pore volume and unique porosity. The present work reports the preparation of an NPC with high surface area (1731 m(2)/g) and pore volume (1.68 cm(3)/g) by direct carbonization of MOF-5. We examined the adsorption of three typical contaminants from aqueous solutions, i. e., sulfamethoxazole (SMX), bisphenol A (BPA) and methyl orange (MO), by using the as-prepared NPC. The results demonstrated that NPC could adsorb the contaminants effectively, with adsorption capacity (qm) of 625 mg/g (SMX), 757 mg/g (BPA) and 872 mg/g (MO), respectively. These values were approximately 1.0-3.2 times higher than those obtained for single-walled carbon nanotubes (SWCNTs) and commercial powder active carbon (PAC) under the same conditions. With its high surface area and unique meso/macropore structure, the enhanced adsorption ofNPCmost likely originates fromthe cooperative interaction of a pore-fillingmechanism, electrostatic interaction, and hydrogen bonding. In particular, the pH value has a crucial impact on adsorption, suggesting the significant contribution of electrostatic interaction between NPC and the contaminants. This study provides a proof-of-concept demonstration of MOF-derived nanoporous carbons as effective adsorbents of contaminants for water treatment. (C) 2017 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V.