碳纳米管杂化水凝胶在环境修复中的应用：电场下吸附效率评估。
Carbon Nanotubes Hybrid Hydrogels for Environmental Remediation: Evaluation of Adsorption Efficiency under Electric Field.
机构信息
Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, 87036 Rende, Italy.
Leibniz Institute of Solid State and Material Research Dresden, 01069 Dresden, Germany.
出版信息
Molecules. 2021 Nov 19;26(22):7001. doi: 10.3390/molecules26227001.
The performance of Carbon Nanotubes hybrid hydrogels for environmental remediation was investigated using Methylene Blue (MB), Rhodamine B (RD), and Bengal Rose (BR) as model contaminating dyes. An acrylate hydrogel network with incorporated CNT was synthesized by photo-polymerization without any preliminary derivatization of CNT surface. Thermodynamics, isothermal and kinetic studies showed favorable sorption processes with the application of an external 12 V electric field found to be able to influence the amount of adsorbed dyes: stronger interactions with cationic MB molecules (qexp and qexp12 of 19.72 and 33.45 mg g, respectively) and reduced affinity for anionic RD (qexp and qexp12 of 28.93 and 13.06 mg g, respectively) and neutral BR (qexp and qexp12 of 36.75 and 15.85 mg g, respectively) molecules were recorded. The influence of pH variation on dyes adsorption was finally highlighted by reusability studies, with the negligible variation of adsorption capacity after five repeated sorption cycles claiming for the suitability of the proposed systems as effective sorbent for wastewater treatment.
采用亚甲基蓝（MB）、罗丹明 B（RD）和孟加拉玫瑰红（BR）作为模型污染物染料，研究了碳纳米管杂化水凝胶在环境修复中的性能。通过光聚合合成了一种带有 CNT 掺入的丙烯酰胺水凝胶网络，而无需对 CNT 表面进行任何初步衍生化。热力学、等温线和动力学研究表明，在外加 12 V 电场的作用下，吸附过程是有利的，发现该电场能够影响吸附染料的量：与阳离子 MB 分子（分别为 19.72 和 33.45 mg g 的 qexp 和 qexp12）具有更强的相互作用，而对阴离子 RD（分别为 28.93 和 13.06 mg g 的 qexp 和 qexp12）和中性 BR（分别为 36.75 和 15.85 mg g 的 qexp 和 qexp12）分子的亲和力降低。最后，通过可重复使用性研究强调了 pH 值变化对染料吸附的影响，在五个重复吸附循环后，吸附容量几乎没有变化，这表明所提出的系统作为废水处理的有效吸附剂是合适的。
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