Fabrication, Microstructure and Catalytic Degradation Performance of MoS2 Hollow Microspheres
Molybdenum disulfide (MoS2) hollow microspheres with the diameter of 2～5 μm were synthesized using tetrabutylammonium bromide (Bu4NBr) as an additive by a hydrothermal method.The effect of temperature,time and concentration of Bu4NBr on the phase and morphology of MoS2 was investigated.The as-prepared MoS2 was characterized by X-ray diffraction (XRD),scanning electron microscope (SEM),energy dispersive spectroscopy (EDS),transmission electron microscope (TEM),and X-ray photoelectron spectra (XPS).The results indicate that hexagonal 2H-MoS2 can be formed at 240 ℃ with good crystallinity.The morphology of MoS2 crystal is greatly affected by the dosage of Bu4NBr.With the increase in the concentration of Bu4NBr,the morphology of MoS2 changes from microspheres,via ball-flowers,to irregular packing.The templating mechanism is proposed to explain the formation of MoS2 hollow structures.Photocatalytie results show that the degradation rate of rhodamine B can reach to 90％ by the MoS2 hollow microspheres under visible light irradiation.
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