反相微乳技术制备MoS_2纳米颗粒

Reverse-microemulsion Synthesis of Nano MoS_2

采用CTAB/甲苯/正丁醇/水反相微乳体系,以四硫代钼酸铵(ATTM)为前驱体,盐酸羟铵作为还原剂,合成了纳米MoS2半导体材料。研究了在常温常压下ω0、反应体系酸度、退火温度对产物MoS2晶相、形貌和尺寸的影响,并探讨了其有关光学性能。

Hexagonal MoS2 nano-grade particles of 20~60 nm in diameter have been synthesized in a CTAB/ toluene/ n-butanol/ water W/O reverse microemulsion with(NH4)2MoS4 as a precursor of molybdenum and NH2OH·HCl as a reducing agent.The effects of synthetic parameters such as acidity,ω0 and annealing temperature on the formation of MoS2 samples were investigated.TEM images showed that acidity and ω0 play important roles in the size of MoS2 nano-grade particles.XRD patterns revealed that MoS2 nano-grade particles,annealed at 700℃ for 2 h under a flow of N2 atmosphere,had high crystallinity with well-stacked layered structure.UV-vis absorption spectra suggested that the onset of the MoS2 nano-grade particles is of significant blue-shift compared to that of bulk MoS2.