High-quality ultra-flat reduced graphene oxide nanosheets with super-robust lubrication performances

Recent advances of two-dimensional lubricating materials: from tunable tribological properties to applications

“…For example, different studies have shown that the realization of the large-scale production of 2D graphene derivatives is hindered by the lack of scalable methods for their synthesis and insurmountable intrinsic structure (curly edges and internal wrinkles). 218,220 The same dilemma can be seen in other 2D nanomaterials such as LDHs and MXenes. For example, the realization of the advanced lubrication behavior of MXene nanoparticles (Ti 3 C 2 T x and Mo 2 CT x ) is still at the laboratory scale and needs further exploration and experimental evidence.…”

“…2D graphene and its derivatives have been considered as one of the earliest 2D materials discovered as a lubricating medium and the most promising alternative to the traditional lubricating additives, such as zinc dialkyl dithiophosphates (ZDDPs), especially to meet the increasingly strict criteria of the emission standard. 218,219 However, nanomaterial additives are accompanied by some drawbacks during their application. For example, different studies have shown that the realization of the largescale production of 2D graphene derivatives is hindered by the lack of scalable methods for their synthesis and insurmountable intrinsic structure (curly edges and internal wrinkles).…”

Using Green, Economical, Efficient Two-Dimensional (2D) Talc Nanosheets as Lubricant Additives under Harsh Conditions

“…At high temperature, the bearing capacity of grease film decreases, and results in severe direct contact of interfacial asperities, leading to increase in friction. However, because of the modified talc-based protective film formed on the rubbing surface, the modified talc-based grease exhibits a significant lubrication performance [ 13 , 42 ]. Although the wear width and wear depth increase with the increase in load, the modified talc-based grease exhibits a better anti-wear performance under different loads.…”

Self‐Assembled 2D/2D Schottky Heterojunction of Ti3C2/UiO‐66 Nanosheets for Boosting Photocatalytic H2 Evolution

“…Notably, a slight shift of diffraction peak at 2 θ = 7.3° to the low angle could be observed over TCUO composites as compared with UiO‐66, which might possibly be caused by the declined dimensionality of 3D UiO‐66 to 2D UO layer, which resulted in the larger lamellar spacing in 2D samples. [ 44,45 ] Raman spectrum was used to further identify sample structure. Compared with TC and UO, new peaks of TCUO‐X appearing at 861, 1143, and 1293 cm −1 in Figure S3, Supporting Information, indicated the recombination of TC and UO.…”