一种双交联策略，用于构建具有高效亚甲基蓝吸附性能的石墨烯气凝胶。
A Double cross-linked strategy to construct graphene aerogels with highly efficient methylene blue adsorption performance.
机构信息
Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing, 210037, PR China; College of Chemical Engineering, Nanjing Forestry University, Nanjing, 210037, PR China.
College of Chemical Engineering, Nanjing Forestry University, Nanjing, 210037, PR China.
出版信息
Chemosphere. 2021 Feb;265:129169. doi: 10.1016/j.chemosphere.2020.129169. Epub 2020 Dec 2.
A novel lysine and EDA double cross-linked graphene aerogel (LEGA) was constructed. The prepared LEGA was utilized as a methylene blue (MB) adsorbent in the wastewater treatment. It exhibits a three-dimensional interconnected porous structure benefiting dye adsorption. Its compression property is highly enhanced with the addition of lysine. Adsorption isotherm and kinetics of MB onto LEGA were discussed. Their results show that MB adsorption onto LEGA was fitted to follow Langmuir adsorption isotherm model and the pseudo-second-order kinetic model. LEGA has an excellent adsorption capacity towards MB as high as 332.23 mg/g and its MB adsorption process is proved to be an exothermic process. The mechanism for MB adsorption onto LEGA was proposed as the ion exchange, electrostatic interaction, π-π stacking interaction and hydrogen bonding. Thus, LEGA is confirmed to be a sustainable and green MB adsorbent with highly removal efficiency in the treatment of wastewater.
一种新型赖氨酸和 EDA 双重交联的石墨烯气凝胶（LEGA）被构建。所制备的 LEGA 被用作废水处理中的亚甲基蓝（MB）吸附剂。它具有三维相互连接的多孔结构，有利于染料吸附。赖氨酸的加入极大地增强了它的压缩性能。讨论了 MB 在 LEGA 上的吸附等温线和动力学。结果表明，MB 在 LEGA 上的吸附符合朗缪尔吸附等温线模型和拟二级动力学模型。LEGA 对 MB 具有高达 332.23mg/g 的优异吸附能力，其 MB 吸附过程被证明是放热过程。MB 在 LEGA 上的吸附机理被提出为离子交换、静电相互作用、π-π 堆积相互作用和氢键。因此，LEGA 被证实是一种可持续和绿色的 MB 吸附剂，在处理废水方面具有高效的去除效率。
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