Novel ultrathin α-MoO 3 square nanosheets with the width of 200-400 nm and the thickness of ∼50 nm were synthesised successfully via a facile and efficient solid sintered method using the carbon@MoS 2 nanocomposites as precursor. The as-prepared products were characterised by X-ray powder diffraction, scanning electron microscopy, transmission electron microscopy, and tested in adsorption and photocatalysis to remove Rhodamine B (RhB). Compared with commercial MoO 3 and/or MoO 3 nanorods, α-MoO 3 square nanosheets exhibit greater adsorptive capacity and photocatalytic performance for degrading RhB. Moreover, this combination of adsorption and photocatalysis using α-MoO 3 could be promising is demonstrated as a more pressing technique for contaminant removal from wastewater.
TiO 2 nanospheres wrapped by graphene-like g-C 3 N 4 nanosheets were fabricated through the one-pot solvothermal process and applied as lubricant additives in paraffin base oil to characterise the tribology performances. Moreover, g-C 3 N 4 /TiO 2 composites were investigated by different characterisation methods such as X-ray diffraction, X-ray photoelectron spectroscopy, and transmission electron microscopy, indicating the formation of g-C 3 N 4 /TiO 2 composites. Subsequently, the friction experiment of the resulting samples using g-C 3 N 4 /TiO 2 hybrids as additives in base oil were tested by a multispecimen friction and wear tester (UMT-2), which indicate g-C 3 N 4 /TiO 2 composites possessed excellent tribological property including significantly reduced frictional coefficient and wear rate as an oil additive, owing to the presence of a thin physical lubricating film on the surface of the matrix.
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