银花状球的室温合成及其光学特性  

Synthesis of Ag flower-like spheres in aqueous solution at room temperature and their optical properties

作　　者：吴会杰[1] 张进[1] 王明光[1] 李元[2] 李庆[2] 

机构地区：[1]重庆文理学院新材料技术研究院,重庆永川402160 [2]西南大学材料与能源学部,重庆北碚400715

出　　处：《重庆文理学院学报（社会科学版）》2015年第2期14-17,28,共5页Journal of Chongqing University of Arts and Sciences（Social Sciences Edition)

基　　金：重庆市自然科学基金重点项目(CSTC2012JJB50011;CSTC2014JCYJA1093);中央高校基本科研业务费专项资金(XDJK2011C064);重庆市教委科技项目(KJ121208);重庆市科技研发基地项目(CSTC2014PTYJD50001);重庆文理学院校级科研项目(Y2011XC60;Y2011XC46)

摘　　要：以柠檬酸三钠和乙二醇为辅助,在室温环境中反应2 h成功合成了纳米Ag花状球.用粉末X射线衍射仪(XRD)、X射线能谱仪(EDX)、场发射扫描电子显微镜(FE-SEM)以及紫外-可见分光光度计(UV-VIS)等对产物进行表征.研究表明,产物结晶性良好,产率高,形貌规整且粒径分布均匀,花状球的平均直径为950 nm.产物于243 nm处产生强的紫外吸收峰.通过对Ag花状球形成机理和实验条件进行系统探讨,提出了三步反应机理,同时发现柠檬酸三钠和乙二醇对产物的形貌和尺寸起着关键作用.Ag flower - like spheres were obtained successfully under the assistance of sodium citrate and eth-ylene glycol at room temperature（25 ℃）for 2 h. The as - prepared samples were characterized by XRD, EDX,FE - SEM and UV - VIS techniques. The results showed that the products were well crystalline and the particle size was uniform with the average diameter of 950 nm. UV - VIS absorption spectrum indicated that the product had a strong absorption peak at 243 nm in ultraviolet light area. Sodium citrate and ethylene glycol play crucial roles on the morphology and size of the products,and a plausible three - step reaction mechanism was proposed to explain the formation of Ag flower - like spheres.

关 键 词：银 花状球 紫外 光学性质 反应机理 

分 类 号：O614.122[理学—无机化学] TB34[理学—化学]