In our research, thiolated reduced graphene oxide aerogels (TrGOAs) was successfully prepared by using graphene oxide (GO) as precursor and sodium hydrosulfide (NaSH) as reductant via a one-pot one-step hydrothermal route under normal pressure and a subsequent freeze-drying, used as a novel carbon-based adsorptive material for adsorbing Cu(II) ions from deionized water. These aerogels show excellent adsorption ability towards Cu(II) ions, which have a huge adsorption amount around 421.21 mg·g⁻¹. We studied the mechanism of the adsorption process of TrGOA-5, and the results found that the pseudo-second-order kinetic model and the Freundlich isotherm model were able to describe this process well. We also explored the interference of pH values in copper ion solutions during this adsorption process, suggesting that increasing pH is good for obtaining a higher adsorption capacity. In addition, solid-liquid separation can be readily realized by filtration and centrifugation after the end of the adsorption experiment. Overall, this research offers a relatively simple and cut-price strategy to obtain thiolated reduced graphene oxide aerogels, and these novel graphene-based adsorbents have a superior adsorption ability and recyclability in segregating copper ions from polluted water.

在我们的研究中，通过在常压下通过一锅式一步水热法，然后通过一锅法一步热液法，成功地使用氧化石墨烯（GO）作为前体和氢硫化钠（NaSH）作为还原剂，成功制备了硫醇还原的氧化石墨烯气凝胶（TrGOAs）。干燥，用作从去离子水中吸附Cu（II）离子的新型碳基吸附材料。这些气凝胶对Cu（II）离子表现出优异的吸附能力，在421.21 mg·g ^-1附近具有巨大的吸附量。我们研究了TrGOA-5吸附过程的机理，结果发现伪二级动力学模型和Freundlich等温模型能够很好地描述这一过程。我们还探讨了在此吸附过程中铜离子溶液中pH值的干扰，这表明增加pH值对于获得更高的吸附容量是有益的。另外，在吸附实验结束后，通过过滤和离心分离可以容易地实现固液分离。总体而言，这项研究提供了一种相对简单且价格低廉的策略来获得硫醇化的氧化石墨烯气凝胶，这些新型的基于石墨烯的吸附剂在从污染水中分离铜离子方面具有出色的吸附能力和可回收性。