A Green Design for Lubrication: Multifunctional System Containing Fe3O4@MoS2 Nanohybrid

摘要

In this work, a green and sustainable strategy for the combined design containing both lubrication and photocatalytic degradation at different stages of base oils has been suggested. More concretely, Fe3O4@MoS2 nanohybrid was prepared and used as an additive for liquid paraffin (LP), resulting in enhanced lubricating properties together with significant photocatalytic degradation performance. The nanohybrid was prepared via a hydrothermal method, which was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy-dispersive spectrometer (EDS), and ultraviolet-visible (UV-vis) spectroscopy. The frictional properties together with photocatalytic degradation behaviors of LP mixtures containing MoS2, Fe3O4, and Fe3O4@MoS2 nanohybrid were under a comparative investigation. The results show that the LP mixture containing 0.08 wt % of Fe3O4@MoS2 nanohybrid can achieve the maximum reduction of friction coefficient; while that containing 0.10 wt % of the nanohybrid possesses the most excellent photocatalytic activity. According to the mechanism analysis, the multifunctional system containing Fe3O4@MoS2 nanohybrid works under a synergistic mechanism by multicomponents, which can be regarded as a preliminary attempt to move along the idea of full-life-cycle green design of a lubricating oil system.