Liu Shuai, Wang Shanshan, Wang Hui, Lv Chongjiang, Miao Yuchen, Chen Lin, Yang Sudong
Laboratory of Environmental Science and Technology, The Xinjiang Technical Institute of Physics and Chemistry, Key Laboratory of Functional Materials and Devices for Special Environments, Chinese Academy of Sciences, Urumqi 830011, China.
College of Grassland and Environmental Sciences, Xinjiang Agricultural University, Urumqi 830052, China.
Sci Total Environ. 2021 Mar 1;758:143660. doi: 10.1016/j.scitotenv.2020.143660. Epub 2020 Nov 20.
Leakage accidents often occur during the production, transportation, and use of petroleum products, which is a common and serious environmental issue. It is of great significance and challenge to develop efficient materials for oil-water separation. This article introduces a simple and feasible method to prepare high-performance 3D graphene foam (GF) oil-absorbing material. Gold nanoparticles (Au NPs) are loaded on the surface of graphene foam by ion sputtering and then modified with 1H, 1H, 2H, 2H-perfluorodecanethiol (PFDT). The prepared graphene sponge is porous with a large specific surface area and excellent water repellency (water contact angle exceeding 150°). The superhydrophobicity of the materials is due to the interaction between the rough structure of gold nanoparticles and the reduction of surface energy by PFDT. These outstanding properties make the functionalized graphene foam have excellent oil absorption capacity, which can even be as high as 25.8 g/g, and it can still maintain high separation performance after 10 cycles of recycling. It is worth noting that the preparation of the material is simple and reusable. Therefore, the prepared graphene foam has the potential as a promising absorbent for oil spill purification.
石油产品在生产、运输和使用过程中经常发生泄漏事故，这是一个常见且严重的环境问题。开发高效的油水分离材料具有重大意义和挑战。本文介绍了一种制备高性能三维石墨烯泡沫（GF）吸油材料的简单可行方法。通过离子溅射将金纳米颗粒（Au NPs）负载在石墨烯泡沫表面，然后用1H，1H，2H，2H-全氟癸硫醇（PFDT）进行改性。制备的石墨烯海绵具有多孔结构、大比表面积和优异的疏水性（水接触角超过150°）。材料的超疏水性源于金纳米颗粒的粗糙结构与PFDT降低表面能之间的相互作用。这些优异性能使功能化石墨烯泡沫具有出色的吸油能力，甚至高达25.8 g/g，并且在10次循环回收后仍能保持高分离性能。值得注意的是，该材料制备简单且可重复使用。因此，制备的石墨烯泡沫有潜力成为一种很有前景的溢油净化吸附剂。
