硫脲辅助溶剂热再结晶对CdS纳米颗粒形貌转变的影响  

Influence of thiourea assisted solvothermal recrystallization on the morphology transitions of the CdS nanoparticles

作　　者：郭福强[1,2] 张保花[1,2] 杨莲红[1,2] 王俊珺[1,2] 

机构地区：[1]新疆凝聚态相变与微结构实验室,伊宁835000 [2]昌吉学院物理系,昌吉831100

出　　处：《四川大学学报（自然科学版）》2014年第1期165-170,共6页Journal of Sichuan University(Natural Science Edition)

基　　金：新疆维吾尔自治区高校科研计划青年教师科研培育基金项目(XJEDU2010S46);新疆凝聚态相变与微结构实验室开放课题基金(XJDX0912-2012-02;XJDX0912-2012-03);昌吉学院院级课题项目(2011YJYB006)

摘　　要：采用传统的溶剂热技术,以无水乙二胺(en)为溶剂,CdCl2·2.5H2O和硫脲(H2NCSH2N)为镉源和硫源,在相同的反应时间下,经过不同的反应温度合成了CdS纳米晶.利用X射线衍射(XRD)图谱和扫面电子显微(SEM)图像对CdS纳米晶产物进行表征,结果显示产物均为六方相的结构,当温度低于160℃时,产物为纳米颗粒状;当温度高于160℃时,产物为CdS纳米棒状.同时,着重研究了添加剂(硫脲)的添加量对CdS纳米颗粒再结晶产物形貌转变的影响,并分析了产物形貌转变的可能机制.CdS nanocrystals were synthesized by convenient solvothermal technologies through the reac- tions of CDC122.5H20 and thiourea （Tu） in ethylenediamine （en） solution under different reaction tem- peratures. The crystallographic structures of CdS nanocrystals were investigated by X-ray diffraction （XRD） and the fractured morphology of CdS nanocrystals were characterized by the Scanning electronic microscope （SEM） respectively. The results show that all products exhibit pure hexagonal wurtzite structure, the morphology of the product was nanoparticles at the temperature below 160 ℃, when the temperature is raised higher than 160 ℃, the products are CdS nanorods. Meanwhile, additives （thiou- tea） was used to assist the recrystallization of the CdS nanoparticles, the transformation process of the morphology of CdS nanoparticles was observed, and the possible mechanism of morphology change was discussed.

关 键 词：CDS 溶剂热 添加剂辅助再结晶 机制 

分 类 号：O649[理学—物理化学]