A type of self-recoverable, adjustable amphiphilic graphene aerogel (GA) was prepared and applied to the dye adsorption. The GA with polyvinyl alcohol (PVA) as its cross-linking agent has the characteristics of adjustable amphiphilicity. By adjusting the PVA content in GA, the later can be used to adsorb dyes with different hydrophobic and hydrophilic properties. Four kinds of dyes (Malachite green, Rhodamine B, Methylene blue and Methyl orange) were applied as targets and the saturated adsorption amounts were calculated. The Langmuir adsorption model and the Lagrange pseudo-second-order equation mathematical model were used to study the behavior of dye adsorption by GA, and the experimental data was in full compliance with the mathematical models. The excellent mechanical properties (compressibility and recoverability) make the GA suitable for dye adsorption. A computational simulation was also performed to verify the adsorption energy of GA to dyes. The GA was able to retain 89.5% of its initial removal efficiency (for malachite green) after 10 cycles of application.

制备了一种可自我恢复的可调节两亲性石墨烯气凝胶（GA），并将其应用于染料吸附。以聚乙烯醇（PVA）为交联剂的GA具有可调两亲性的特性。通过调节GA中的PVA含量，后者可用于吸附具有不同疏水性和亲水性的染料。以四种染料（孔雀石绿，若丹明B，亚甲基蓝和甲基橙）为目标，计算了饱和吸附量。用Langmuir吸附模型和Lagrange伪二阶方程数学模型研究了GA对染料的吸附行为，实验数据与数学模型完全吻合。出色的机械性能（可压缩性和可恢复性）使GA适合染料吸附。还进行了计算仿真，以验证GA对染料的吸附能。经过10个循环的应用，GA能够保留其初始去除效率（对于孔雀石绿）的89.5％。