PbTe/PbSe三维树枝结构的水热合成及形貌控制  

Controllable Synthesis and Shape Evolution of PbTe/PbSe Three-dimensional Dendritic Structures by a Hydrothermal Method

作　　者：陈仲林[1] 彭宇[1] 丁宗财 周健[1] 

机构地区：[1]厦门大学材料学院,福建厦门361005

出　　处：《厦门大学学报（自然科学版）》2014年第5期732-738,共7页Journal of Xiamen University：Natural Science

摘　　要：采用简单的水热合成法制备了三维树枝结构的PbTe/PbSe复合材料,利用X射线衍射(XRD)、场发射扫描电子显微镜(FESEM)、透射电子显微镜(TEM)等分析手段进行材料结构和形貌表征.研究反应过程的影响因素及晶体的形成机制.结果表明,产物的形貌受反应时间、反应温度、NaOH浓度的控制.基于不同反应时间产物的分析,推测产物的结构可能是一种包覆结构(PbTe被PbSe包覆),并分析了形成这种结构的原因.PbTe/PbSe three-dimensional dendritic structures have been successfully fabricated by a simple hydrothermal method. The structure and surfacial characteristics of these as-prepared samples were studied by X-ray diffraction pattern （XRD）,field emis- sion scanning electron microscopy （FESEM）, and transmission electron microscopy （TEM）. Some reaction factors influencing the formation of PbTe/PbSe dendrites were systematically investigated. The morphology of the obtained products can be controlled by changing the reaction time,the reaction temperature and the concentration of NaOH. Based on the time-dependent experiment, it is proposed that the structure of the products may be a coating structure （PbTe is coated by PbSe）. The mechanism for the formation of the coating structure has been discussed.

关 键 词：水热法 PBTE PbSe复合材料 三维树枝结构 形貌控制 

分 类 号：TQ129[化学工程—无机化工]