In this study, a series of graphitic carbon nitride (g-C₃N₄) decorated with Cu nanoparticle hybrids (CNx/Cuy) were prepared by one pot calcination method. The chemical composition of hybrids were determined by XRD, FTIR and XPS analysis. And the synthesized CNx/Cuy hybrid presented different morphologies with the different x/y ration. Then CNx/Cuy were added to liquid paraffin as lubricant additive, and the tribological properties of lubricant oils for steel/steel friction pairs were evaluated using a ball-on-disk tribometer. The results showed that friction processes lubricated with oil containing CN3/Cu1 shows better tribological properties. And oil containing 0.2 wt.% CN3/Cu1 could achieve 57.3% and 53.8% reduction in the friction coefficient, respectively, compared to pure liquid paraffin and liquid paraffin containing pure g-C₃N₄. Based on the analysis of the worn surface topography and chemical composition, the excellent lubrication performance resulted from the formation of tribochemistry-induced tribo-film. The average thickness of tribo-film was about 100 nm, and it was composed of carbonization resulting from g-C₃N₄, Cu, Fe and self-lubricating Fe₂O₃. The formation of Fe₂O₃ and carbonization in the tribo-film indicating the interaction between CN3/Cu1 with steel surfaces enhanced the stability and strength of tribo-film. Thereby the metal surface was further protected from friction and wear.

本研究采用一锅煅烧法制备了一系列Cu纳米粒子杂化物(CNx/Cuy)修饰的石墨氮化碳(gC ₃ N _{4 )。}通过 XRD、FTIR 和 XPS 分析确定杂化物的化学成分。合成的CNx/Cuy杂化物在不同的x/y比下呈现出不同的形貌。然后将CNx/Cuy作为润滑剂添加剂添加到液体石蜡中，并使用球盘摩擦试验机评估钢/钢摩擦副润滑油的摩擦学性能。结果表明，用含有 CN3/Cu1 的油润滑的摩擦过程表现出更好的摩擦学性能。含油0.2 _{与纯液体石蜡和含有纯gC 3} N ₄的液体石蜡相比，wt.% CN3/Cu1 的摩擦系数分别降低了57.3%和53.8% 。根据对磨损表面形貌和化学成分的分析，优异的润滑性能是由于摩擦化学诱导的摩擦膜的形成而产生的。摩擦膜平均厚度约为100 nm，由gC ₃ N ₄、Cu、Fe和自润滑Fe ₂ O ₃ 碳化物组成。_{Fe 2} O ₃的形成摩擦膜中的碳化表明 CN3/Cu1 与钢表面之间的相互作用增强了摩擦膜的稳定性和强度。从而进一步保护金属表面免受摩擦和磨损。