College of Chemistry and Chemical Engineering, Southwest Petroleum University, 8 Xindu Avenue, Chengdu, Sichuan 610500, PR China; State Key Lab of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, 8 Xindu Avenue, Chengdu, Sichuan 610500, PR China; Research Institute of Industrial Hazardous Waste Disposal and Resource Utilization, Southwest Petroleum University, Chengdu, Sichuan 610500, PR China.
College of Chemistry and Chemical Engineering, Southwest Petroleum University, 8 Xindu Avenue, Chengdu, Sichuan 610500, PR China; State Key Lab of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, 8 Xindu Avenue, Chengdu, Sichuan 610500, PR China.
J Hazard Mater. 2020 Apr 15;388:121752. doi: 10.1016/j.jhazmat.2019.121752. Epub 2019 Nov 24.
Super-wetting MOFs@graphene hybrid has shown promising application for oil/water separation, due to high porosity, low density, and controllable wettability, however, achieving excellent stability and recyclability are found to be still challenging. In this study, sandwich-like UIO-66-F@rGO hybrid was synthesized by immobilization of UIO-66-F nanoparticles on rGO matrix, which featured the unique micro/nano hierarchy with hydrophobic characteristics. In order to realize the oil/water separation, as-prepared sandwich-like UIO-66-F@rGO hybrid was applied as a potential candidate for constructing robust super-hydrophobic/super-oleophilic interfaces by using filter paper (FP) and melamine sponge (MS) as substrates. Typically, the surface modification of substrates can be easily achieved by simple dip-coating method, and interfacial adhesion between substrates and UIO-66-F@rGO was enhanced by cross-linking of hydroxyl-fluoropolysiloxane (FPSO). Consequently, the super-hydrophobic/oleophilic UIO-66-F@rGO/FP exhibited high contact angle of 169.3 ± 0.6° and was capable of separating various water-in-oil emulsions effectively. The flux and separation efficiency were 990.45 ± 36.28 Lm h and 99.73 ± 0.19 % driven by gravity, respectively. The super-hydrophobic/super-oleophilic UIO-66-F@rGO/MS possessed selective oil absorption with absorption capacity of 26∼61 g/g depending on the viscosity of oils and continuous cleaning of oil spill. Furthermore, the UIO-66-F@rGO composite could tolerate high/low temperature, corrosive solutions, and physical damage, displaying robust and stable super-hydrophobic/super-oleophilic interfaces for treating oily wastewater in harsh environments.
超润湿 MOFs@graphene 杂化材料由于其高孔隙率、低密度和可控制的润湿性，在油水分离方面显示出了很有前景的应用，然而，实现优异的稳定性和可回收性仍然具有挑战性。在这项研究中，通过将 UIO-66-F 纳米粒子固定在 rGO 基体上，合成了三明治状的 UIO-66-F@rGO 杂化材料，其具有独特的微/纳分级结构和疏水性特征。为了实现油水分离，将制备的三明治状 UIO-66-F@rGO 杂化材料用作潜在的候选材料，通过使用滤纸（FP）和三聚氰胺海绵（MS）作为基底来构建坚固的超疏水/超亲油界面。通常，通过简单的浸涂法可以很容易地实现基底的表面改性，并且通过交联羟基-氟聚硅氧烷（FPSO）可以增强基底和 UIO-66-F@rGO 之间的界面附着力。因此，超疏水/亲油的 UIO-66-F@rGO/FP 表现出 169.3±0.6°的高接触角，能够有效地分离各种水包油乳液。在重力驱动下，通量和分离效率分别为 990.45±36.28 Lm h 和 99.73±0.19%。超疏水/亲油的 UIO-66-F@rGO/MS 具有选择性吸油能力，吸油能力取决于油的粘度，可达 26∼61 g/g，并且可以连续清理溢油。此外，UIO-66-F@rGO 复合材料能够耐受高温/低温、腐蚀性溶液和物理损伤，在恶劣环境中处理含油废水时具有坚固且稳定的超疏水/超亲油界面。
