α-MnS纳米晶的制备与表征.pdf

施锦杰等:弯曲荷载与氯盐耦合作用下混凝土中钢筋锈蚀程度评估· 1175 ·第39卷第7期α-MnS纳米晶的制备与表征柴多里1,杨少东1,袁新松2,杨保俊1(1. 合肥工业大学化学工程学院,合肥 230009;2. 合肥师范学院化学化工系,合肥 230601) 摘要:以硫酸锰为硫源、六次甲基四胺为还原剂,通过气–固相还原反应制备了α-MnS纳米晶。采用X射线衍射、透射电子显微镜、电子衍射、高分辨电子显微镜、电子能谱和紫外–可见分光光度法等对样品的结构、形貌、成分和光学性质进行了表征。结果表明:所制备的样品为纯立方晶型的单晶α-MnS纳米颗粒,粒径小,分布窄,分散性较好;紫外–可见吸收峰值与α-MnS块体材料对应峰值326nm相比发生明显“蓝移”现象,可归因于纳米微粒的量子尺寸效应,说明所制备的α-MnS纳米晶具有一定的光学活性,在光电领域具有潜在的应用。关键词:α-硫化锰;纳米晶;六次甲基四胺;气–固相还原反应中图分类号:; 文献标志码:A 文章编号:0454–5648(2011)07–1175–04 Preparation and Characterization of α-MnS Nanocrystals CHAI Duoli1,YANG Shaodong1,YUAN Xinsong2,YANG Baojun1(1. School of Chemical Engineering, Hefei University of Technology, Hefei 230009; 2. Department of Chemistry and Chemical Engineering, Hefei Normal University, Hefei 230601, China) Abstract: α-MnS nanocrystals were prepared via a novel gas-solid phase reduction route, in which manganese (Ⅱ) sulfate was used as a sulfur source and hexamine as a reducer. The structure, morphology, component and optical property of the as-prepared samples were characterized by X-ray powder diffraction, transmission electron microscopy, electronic diffraction, high-resolution transmission electron microscopy, energy dispersive X-ray spectra and ultraviolet–visible (UV–Vis) spectrophotometer. The results show that the as-prepared samples are pure cubic single-cryatalline α-MnS nanoparticles with the small size and the narrow