采用水热法合成了Zn²⁺掺杂石墨烯二氧化铈(CeO₂/G)复合纳米材料。通过四球摩擦机对掺杂前后的CeO₂/G复合材料进行摩擦实验,考察了Zn²⁺掺杂对CeO₂/G复合材料摩擦性能的影响。利用X-射线衍射仪、X射线光电子能谱仪、红外光谱仪、扫描电子显微镜对复合材料进行磨损表面分析和性能测试。结果表明,Zn²⁺掺杂没有对CeO₂/G复合材料的结构产生影响,但使CeO₂粒子尺寸大小更加均匀,在石墨烯基底上分散情况更好。在载荷为392 N、转速为1 200 r/min下,CeO₂/G材料使润滑油摩擦系数下降48.4%,磨斑直径下降20%;而Zn²⁺掺杂的CeO₂/G材料使润滑油抗磨性能更好,摩擦系数下降60%,磨斑直径下降28%。

Zn²⁺ doped graphene-cerium dioxide (CeO₂/G) composite nanomaterials are synthesized through using a hydrothermal method.The effects of Zn doping on the friction properties of CeO₂/G composites are studied by using a four-ball tribometer.The wear surface and properties of the composites are analyzed by means of X-ray diffractometer,X-ray photoelectron spectroscopy,infrared spectrometer and scanning electron microscope.The results show that Zn²⁺ doping has no impact on the structure of CeO₂/G composites,but makes CeO₂ particles more uniform in size and better disperse on graphene substrate.Under a load of 392N and a rotation speed of 1 200 r·min^-1,CeO₂/G composites make the friction coefficient of lubricating oil decrease by 48.4% and the diameter of grinding spot decrease by 20%.Zn²⁺ doped CeO₂/G material makes the lubricating oil have a better wear resistance,the friction coefficient decreases by 60% and the diameter of the wear spot decreases by 28%.

赵胡英(1998-),女,硕士生,研究方向为纳米润滑添加剂,1710456483@qq.com