A novel type of hybrid graphene oxide/laponite (GO/L) layered membrane is developed with stable two-dimensional (2D) nanochannels for efficient separations in aqueous environments. The electrostatic attractions are generated between the positive charges at the edges of laponite nanosheets and the oxygen-containing groups of GO nanosheets, and such electrostatic attractions between the adjacent GO and laponite nanosheets provide the hybrid GO/L layered membranes strong stability in aqueous environments. When the content of laponite nanosheets in GO/L layered membranes reaches 50 wt %, the GO/L layered membranes are stable enough to be operated in both water and ethanol solutions. Because the hydrophilicity of the hybrid GO/L layered membranes is improved to some extent by the addition of hydrophilic laponite nanosheets, the water permeability of GO-based membranes could be slightly enhanced. Furthermore, because the regularity of the 2D nanochannels of hybrid GO/L layered membranes is not affected by the hybrid regular laponite nanosheets, the separation efficiency of GO-based membranes is high. Demonstrations of efficient separations with the hybrid GO/L layered membranes with 50 wt % laponite nanosheets are carried out for separating basic fuchsine and brilliant yellow dyes from aqueous solutions, and the results show both high permeability and high rejection. The proposed membranes are highly potential for water treatments such as removal of dyes, hormones, and pesticides from aqueous solutions.

中文翻译：

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具有稳定二维纳米通道的混合氧化石墨烯/皂石层状膜，可在水性环境中高效分离

新型的杂化氧化石墨烯/膨润土（GO / L）层状膜具有稳定的二维（2D）纳米通道，可在水性环境中有效分离。锂皂石纳米片边缘的正电荷与GO纳米片的含氧基团之间会产生静电吸引，相邻的GO和锂皂石纳米片之间的这种静电吸引为混合GO / L层状膜在水性环境中提供了强大的稳定性。当GO / L层状膜中的皂石纳米片的含量达到50重量％时，GO / L层状膜足够稳定以在水和乙醇溶液中均可操作。由于通过添加亲水性皂石纳米片，GO / L杂化层膜的亲水性得到了一定程度的改善，GO基膜的透水性可以稍微提高。此外，由于杂化的规则锂皂石纳米片不影响杂化的GO / L层状膜的二维纳米通道的规则性，因此基于GO的膜的分离效率高。演示了使用具有50 wt％锂皂石纳米片的杂化GO / L层状膜进行有效分离的方法，用于从水溶液中分离碱性品红和亮黄色染料，结果显示出高渗透性和高截留率。提出的膜在水处理中具有很高的潜力，例如从水溶液中去除染料，激素和农药。因为杂化规则锂皂石纳米片不会影响杂化GO / L层状膜的二维纳米通道的规则性，所以GO基膜的分离效率很高。演示了使用具有50 wt％锂皂石纳米片的杂化GO / L层状膜进行有效分离的方法，用于从水溶液中分离碱性品红和亮黄色染料，结果显示出高渗透性和高截留率。提出的膜在水处理中具有很高的潜力，例如从水溶液中去除染料，激素和农药。因为杂化规则锂皂石纳米片不会影响杂化GO / L层状膜的二维纳米通道的规则性，所以GO基膜的分离效率很高。演示了使用具有50 wt％锂皂石纳米片的杂化GO / L多层膜进行有效分离的方法，用于从水溶液中分离碱性品红和亮黄色染料，结果显示出高渗透性和高截留率。提出的膜在水处理中具有很高的潜力，例如从水溶液中去除染料，激素和农药。演示了使用具有50 wt％锂皂石纳米片的杂化GO / L层状膜进行有效分离的方法，用于从水溶液中分离碱性品红和亮黄色染料，结果显示出高渗透性和高截留率。提出的膜在水处理中具有很高的潜力，例如从水溶液中去除染料，激素和农药。演示了使用具有50 wt％锂皂石纳米片的杂化GO / L层状膜进行有效分离的方法，用于从水溶液中分离碱性品红和亮黄色染料，结果显示出高渗透性和高截留率。提出的膜在水处理中具有很高的潜力，例如从水溶液中去除染料，激素和农药。