分级微纳结构MoS_2空心球的制备及其摩擦性能

Preparation of Hollow MoS_2 Spheres with Hierarchical Micro/Nano Architectures and Their Tribological Properties

0引言 近年来,具有复杂分级结构的物质由于具有新颖的磁学和电学性能而被广泛用于生物技术,催化剂,光学器件,药物释放,光子晶体中。利用各种物理和化学方法,研究者们在制备各种纳米/微米尺度的分级结构上取得了很大的进步,这其中包括：仿生、纳米尺度单元的定向聚集、水热法、

MoS2 uniform hierarchical microspheres were grown on a large scale by a simple hydrothermal method with the help of the surfactant tetrabutyl ammonium bromide （C16H36BrN）. X-ray diffraction （XRD）,scanning electron microscopy （SEM）,transmission electron microscopy （TEM）,Fourier transform infrared spectrometer （FTIR）,and thermogravimetric analysis （TGA） were used to characterize the products. The X-ray diffraction （XRD） pattern of the sample could be readily indexed to MoS2. SEM and TEM images showed that the as-prepared products were hollowed and constructed by nanosheets,with the diameter of about 2 μm and wall thickness of 100 nm. The possible formation mechanism of the flower-like structures was proposed on the experiment fact. The friction experiment was made at four-ball tribotester and it could be concluded that the base oil MoS2 macrostructures had better friction reduction than those with commercial MoS2.