Reinforcement of nanoporous lanthanum-doped zinc borate by vanadium selenide nanosheets for improved tribological activity

Abstract

Successful reinforcement of nanoporous lanthanum-doped zinc borate by vanadium selenide nanosheets and their utilization in Tribology has been described.

Heterolamellar Bi2Se3/Bi2WO6 and Bi2Se3/N-Doped Bi2WO6 Nanosheet Composites as Potential Antifriction and Antiwear Agents

“…HR-TEM images of the hybrids, Bi 2 Se 3 /Bi 2 WO 6 and Bi 2 Se 3 /N-Bi 2 WO 6 , reveal that the interlayer distance of the Bi 2 Se 3 associated with the (015) plane has risen from 0.31 to 0.34 nm (Figure d 1 ,e 1 ). The increase in the interlayer distance of the (015) plane in Bi 2 Se 3 indicates that Bi 2 Se 3 nanosheets have interacted efficiently with Bi 2 WO 6 and N-Bi 2 WO 6 in their respective composites. ,, The selected-area electron diffraction (SAED) patterns of the as-synthesized additives, in the inset of corresponding figures, demonstrate their polycrystalline nature.…”

“…The smoothness of the graph corresponds to the nature of the tribofilm. 35 In the case of doped binary nanohybrid, Bi 2 Se 3 and N-Bi 2 WO 6 nanosheets have, therefore, substantially interacted to form an adherent, uniform, and stable tribofilm, separating the mating surfaces efficiently to give significant MWD and COF values.…”

“…Oxysalts like chromates, sulfates, tungstates, molybdates, and vanadates have been highlighted in the literature for their exemplary lubricity owing to low shear strength and high ductility at high temperatures. − Numerous tungstates like CuWO 4 , ZnWO 4 , CaWO 4 , and PbWO 4 have been proven as solid lubricants. , Bismuth tungstate (Bi 2 WO 6 ), a nontoxic n-type semiconductor (bandgap 2.8 eV) with high chemical and thermal stability, possesses an orthorhombic crystal structure. , It is an Aurivillius-phase perovskite containing alternating fluorine-like layers [Bi 2 O 2 ] 2+ and perovskite layers [WO 4 ] 2– . , So, like other tungstates, bismuth tungstate (Bi 2 WO 6 ) was synthesized to explore its lubricious behavior, which has not been used in tribology. It has been reported that doped nanomaterials, due to the creation of defects, lead to the formation of slip systems that can change the electronic structure and lower the shear strength; ultimately, tribological properties are enhanced. ,,− Nitrogen-doped Bi 2 WO 6 was therefore synthesized for the advancement of lubrication performance.…”

Superlubricity of Nanocomposites of Polyaniline-Functionalized Reduced Graphene Oxide with Yttrium and Vanadium-Codoped Zinc Oxide Nanoparticles

“…1,2,6,9−14 interactions like electrostatic, π−π, or van der Waals forces are introduced when a noncovalent modification is performed. 2 Nanoparticles of metals such as Ni, 15 Cu, 16,17 Ag, 18,19 and Pd 20 and metal salts such as oxides ZrO 2, 21,22 ZnO, 23,24 and CeO 2; 25 sulfides MoS 2, 26,27 WS 2, 28 Ag 2 S, 29 and CuS; 30 selenides VSe 2 31 and Bi 2 Se 3 ; 32 and halides like LaF 3 33 have been extensively investigated as components of nanolubricants. 34,35 Their composites with graphene, such as copper, 36 silver, 37,38 Mn 3 O 4, 39 ceria, 40 zirconia, 41 boron nitride, 42 and WS 2 , 43 are well documented in the literature for enhanced tribological performance.…”

“…Nanoparticles of metals such as Ni, Cu, , Ag, , and Pd and metal salts such as oxides ZrO 2, , ZnO, , and CeO 2; sulfides MoS 2, , WS 2, Ag 2 S, and CuS; selenides VSe 2 and Bi 2 Se 3 ; and halides like LaF 3 have been extensively investigated as components of nanolubricants. , Their composites with graphene, such as copper, silver, , Mn 3 O 4, ceria, zirconia, boron nitride, and WS 2 , are well documented in the literature for enhanced tribological performance. Some graphene-based nanocomposites were also investigated by performing superlubricity (COF less than 0.01). , A titanium dioxide-reinforced boron nitrogen-codoped graphene nanocomposite was reported from our laboratory for excellent tribological activity .…”