六亚甲基四胺辅助微波水热法合成γ-MnS微晶球及其光学性能  

Hexamethylene Tetramine-Assisted Microwave Hydrothermal Synthesis and Optical Properties of Spherical γ-MnS Crystallites

作　　者：辛宇[1] 黄剑锋[1] 曹丽云[1] 刘佳[1] 吴建鹏[1] 

机构地区：[1]教育部轻化工助剂化学与技术重点实验室,陕西科技大学,西安710021

出　　处：《硅酸盐学报》2012年第12期1779-1785,共7页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金(50942047);陕西省国际科技合作重点项目2011KW-11);陕西省自然科学基金(2010JM6001);陕西省教育厅自然科学专项基金(09JK361);陕西科技大学研究生创新基金资助项目

摘　　要：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。Spherical γ-MnS crystallites were synthesized with manganese chloride and thioacetamide as source materials and hexa- methylene tetramine （HMTA） as an additive by a microwave hydrothermal process. The influence of the HMTA amount on the phase structure and morphology of the crystallites was investigated by X-ray diffraction and field emission scanning electron microscopy, respectively. The results show that the morphology of the products changes from hexagonal columns to hexagonal flakes and self-assembled into spherical crystallites when adding the HMTA of 5 mmol. The surface of the self-assembled spheres becomes smoother, and the corresponding particle size decreases and the particle size distribution becomes narrower when the amount of HMTA increases. The UV-Visible spectrum analysis indicates that the hexagonal flakes self-assembled spherical γ-MnS crystallites have an intensive absorption peak in the ultraviolet spectrum between 300-400 nm. Also, the absorption peak becomes more and more intensive when the amount of the HMTA increases, exhibiting a red shift that may have a potential application prospect in photoelectric areas.

关 键 词：微波水热法 γ-硫化锰微晶球 六亚甲基四胺 

分 类 号：O782[理学—晶体学]