摘要
以有机溶剂热技术制备片状Zn(en)3Se(en为乙二胺)纳米材料,DTGI、R、XRD分析结果表明该化合物中乙二胺与中心离子Zn2+通过配位键相结合;以制得的纳米Zn(en)3Se为母体,在氮气氛中煅烧至980℃,热分解制得棒状纳米ZnSe;以TEM、ED初步研究了两者的形貌、结构;以提拉法分别将Zn(en)3Se、ZnSe纳米材料涂布在ITO导电玻璃上,制得纳米颗粒/ITO复合膜,并研究其光学特性。结果表明,Zn(en)3Se属立方晶系,呈片状结构;ZnSe属六方纤锌矿型,棒直径在40nm左右;可能的生长机理是乙二胺作为模板分子,首先嵌入到ZnSe无机结构框架中,接着受热分解逃逸出无机框架形成一维纳米棒。PL分析表明Zn(en)3Se的荧光红移至448nm处。
The precursor Zn（en）3 Se nanosheets （en=ethylenediamine） were prepared via a solvothermal process from elemental selenium and zinc using ethylenediamine as a solvent. Detailed characterizations of thermogravimetric analysis （TG）, the infrared absorbance spectroscopy （IR） and powder X-ray diffraction （XRD） confirmed three en coordinated with Zn2~ to form a complex cation. Phase-pure hexagonal wurtzite ZnSe products were obtained by annealing the precursor in nitrogen stream at about 980℃. The morphological property was also characterized by transmission electron microscopy （TEM） and electron diffraction analysis （ED）. Zn （en）3Se, ZnSe nano-particles were doped onto the indium-tin oxide glass （ITO） by dipping progress, and the nano-particles/ITO composite film were acquired. Zn（en）3Se show a sheet nanostructure, and ZnSe nanorods display a diameter about 40nm. The possible mechanism of formation process was that ethylenediamine acts as a template molecule which was incorporated into the inorganic framework first and then escapes from nanocrystallites after annealing with desires morphologies such as nanorods or nanosticks. The fluorescence spectra were also studied. PL results showe that Zn（en）3Se excited a fluorescence at 448nm.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2005年第9期1324-1327,共4页
Journal of Functional Materials
基金
福建省科技厅重点资助项目(02H0340)
福建省教育厅资助项目(JA02192
JA02189
JB021777)
关键词
一维纳米材料
溶剂热法
金属硫族化合物
半导体
光致发光
one-dimensional nano-material
solvothermal method
metal chalcogenides
semiconductor
photoluminescence
