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采用微波水热法,分别以氯化锰和硫代乙酰胺为锰源和硫源,以六亚甲基四胺(HMTA)为添加剂合成了γ-MnS微晶球。利用X射线衍射仪,场发射扫描电子显微镜,研究了HMTA加入量对样品的物相结构和微观形貌的影响。结果表明:当加入5mmol HMTA,产物由六方柱变为六方片状,并自组装成球状微晶,随着HMTA加入量的增大,自组装的球体表面逐渐光滑,粒径逐渐减小到2μm,且粒径较为均一。紫外–可见吸收光谱研究表明,六方片自组装的γ-MnS微晶球在300～400 nm处出现了较强的紫外吸收峰,随着HMTA加入量的增加,该吸收峰强度变强,且出现了明显的红移,在光电领域具有潜在的应用前景。
The γ-MnS microcrystalline spheres were synthesized by microwave hydrothermal method using manganese chloride and thioacetamide as manganese source and sulfur source with hexamethylenetetramine (HMTA) as additive. Using X-ray diffraction and field emission scanning electron microscopy, the effects of HMTA loading on the phase structure and microstructure of the samples were investigated. The results showed that when 5 mmol HMTA was added, the product was changed from hexagonal column to hexagonal plate and self-assembled into spherical microcrystals. With the addition of HMTA, the surface of the self-assembled sphere gradually became smooth and the particle size decreased to 2 μm , And the particle size is more uniform. The results of UV-Vis absorption spectra showed that the hexagonal self-assembled γ-MnS microcrystal spheres showed strong ultraviolet absorption peak at 300-400 nm, and the intensity of the absorption peak increased with the addition of HMTA There has been a clear redshift, which has potential applications in the field of optoelectronics.