树枝状微米NiSe_2的制备及形成机制  

Preparation and formation mechanism of dendritic microstructure of NiSe_2

作　　者：刘少华[1,2] 刘方先[2] 田博士[1] 张新磊[1] 王振领[1] 

机构地区：[1]周口师范学院化学系,河南周口466001 [2]南京师范大学化学与材料科学学院,江苏南京210046

出　　处：《化学研究与应用》2012年第12期1819-1823,共5页Chemical Research and Application

基　　金：国家自然科学基金(20871070);周口师范学院青年科研基金(zknuqn201026A);周口师范学院应用化学重点学科经费资助

摘　　要：以聚乙二醇(PEG)为软模板,SeO2为硒源,通过水热法制备了立方结构的树枝状NiSe2微米粒子。用X-射线衍射(XRD)、扫描电子显微镜(SEM)和高分辨透射电子显微镜(HRTEM)等手段对样品的形貌和结构进行了表征。结果表明,PEG的存在、溶液的pH值以及反应时间等因素对产物的形貌和结构有较大影响。在PEG的辅助下,NiSe2微米粒子能形成规整的树枝状结构;在无PEG的条件下,则形成了正八面体结构的微米粒子。并提出了树枝状NiSe2微米粒子的形成机理。The dendritic nanostructure of NiSe2 nanoparticles were prepared via hydrothermal reaction with PEG as soft template and SeO2 as raw materials. Their structures and morphologies were characterized by-X-my powder diffraction（ XRD）, scanning electron microscopy（SEM） and high resolution transmission electron microscopy（HRTEM）. The results showed that the presence of PEG, pH values of solution and reaction time have great effect on shape of products. The dendritic nanostructure NiSe2 could form when PEG present in solution, while the octahedral structure of NiSe2 nanoparticles were formed without PEG. Also, the formation mechanism of products was proposed.

关 键 词：树枝状NiSe2 聚乙二醇(PEG) 制备 形成机理 

分 类 号：O614.8[理学—无机化学]