Rolling friction performance and functional conversion from lubrication to photocatalysis of hollow spherical nano-MoS2/nano-TiO2

Friction and wear characteristics of TiO 2 nano-additive water-based lubricant on ferritic stainless steel

“…Numerous mechanisms, including rolling/ball-bearing effect [9,18,45,46], protective film/tribofilm [11,14,19,22,[47][48][49][50][51], mending effect [10,52], polishing effect [18,46], synergistic effect [53,54], and thirdbody effect [28,45,[55][56][57], have been proposed to explain the lubrication enhancement of the nanolubricants. The rolling effect means that NPs can act as ball bearings between the rubbing surfaces in case that sliding or ploughing occurs [45].…”

Highly efficient visible-light photocatalytic activity of MoS2–TiO2 mixtures hybrid photocatalyst and functional properties

“…[18][19][20][21][22][23] Researchers have focused on synthesizing heterostructure nanocomposites such as MoS 2 /RGO, MoS 2 /TiO 2 , MoS 2 /CuO, MoS 2 /CuS, and MoS 2 / MoO 3 . [24][25][26][27][28][29] Among these, MoS 2 /TiO 2 heterostructure is the best photocatalyst under visible-light irradiation due to the separation of charge carriers. MoS 2 /TiO 2 nanostructures possess more surface-active sites than other nanostructures and this enhances the light absorption by the photocatalysts.…”

Study on self-loosening of bolted joints excited by dynamic axial load

“…It is found from the numerical results that the dissipated frictional energy for the MoS 2 coated bolt is slightly larger than that for the PTFE coated bolt. However, the bonding strength of MoS 2 coating is much higher than that of PTFE coating [55,58] . Consequently, the MoS 2 coated bolt has better anti-loosening performance than the PTFE coated bolt.…”

“…In this paper, the self-loosening behaviour of bolted joints excited by dynamic axial load is studied at five levels of both preload and excitation amplitude. According to previous studies, PTFE coating and MoS 2 coating have low coefficient of friction and good self-lubricating properties [55][56][57][58][59] , and TiN coating has high hardness and excellent wear-resistance [60][61][62][63] . Hence, the three coatings are utilized to treat bolts respectively, and their effects on anti-loosening performance of bolted joints are investigated in this paper.…”