School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, PR China; Shannxi Engineering laboratory for Graphene New Carbon Materials and Applications, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, PR China.
School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, PR China; Shannxi Engineering laboratory for Graphene New Carbon Materials and Applications, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, PR China.
J Hazard Mater. 2023 Sep 5;457:131846. doi: 10.1016/j.jhazmat.2023.131846. Epub 2023 Jun 12.
Fabrication of highly elastic three-dimensional aerogel adsorbents with outstanding adsorption capacities is a long pursuit for the treatment of industrial contaminated water. In this work, a magnetic reduced graphene oxide (rGO)/FeO/carbon nanotubes (CNTs) aerogel material was constructed by the electrostatic attraction between the negatively charged GO and positively charged CNTs following a one-pot water bath treatment. The as-synthesized aerogel demonstrated high compressive stress (28.4 kPa) and lower density (24.11 mg/cm) with exceptional adsorption capacities for versatile adsorbates which are attributed to CNTs and magnetic FeO nanoparticles. The effect of pH, initial concentration of adsorbates (dyes, Cd (ІІ) ions, organic solvents, and pump oil), content of CNTs and cyclic times on the adsorption capacities of the aerogel were investigated in detail. Furthermore, from simulation, the adsorption kinetics, and thermodynamics of the aerogel for adsorbates were more satisfied by endothermic quasi-second-order kinetic model with characteristic physical adsorption. Thus, the optimized rGO/FeO/CNTs-10 aerogel adsorbent can be used as a powerful and versatile tool to deal with contaminated industrial or domestic wastewater.
制备具有高弹性和出色吸附能力的三维气凝胶吸附剂是处理工业污染水的长期追求。在这项工作中，通过在一锅水浴处理中利用带负电荷的 GO 和带正电荷的 CNTs 之间的静电吸引作用，构建了磁性还原氧化石墨烯(rGO)/FeO/碳纳米管(CNTs)气凝胶材料。所合成的气凝胶表现出高压缩应力（28.4kPa）和低密度（24.11mg/cm），对各种吸附剂具有出色的吸附能力，这归因于 CNTs 和磁性 FeO 纳米粒子。详细研究了 pH、吸附剂（染料、Cd（ІІ）离子、有机溶剂和泵油）的初始浓度、CNTs 的含量和循环次数对气凝胶吸附能力的影响。此外，通过模拟，气凝胶对吸附剂的吸附动力学和热力学更符合特征物理吸附的吸热准二级动力学模型。因此，优化的 rGO/FeO/CNTs-10 气凝胶吸附剂可用作处理污染工业或家庭废水的强大且通用的工具。
