Panda Subhendu K, Chaudhuri Subhadra
DST Unit on Nanoscience and Department of Materials Science, Indian Association for the Cultivation of Science, Kolkata, India.
J Colloid Interface Sci. 2007 Sep 1;313(1):338-44. doi: 10.1016/j.jcis.2007.04.032. Epub 2007 Apr 20.
Monodispersed hollow ZnS microspheres have been successfully synthesized by a facile ethylenediamine tetraacetic acid (EDTA) mediated hydrothermal route. The sizes of the hollow spheres vary from 1.5 to 3.5 microm when the reaction temperature varied from 130 to 230 degrees C. The formation of these hollow spheres is attributed to the oriented aggregation of ZnS nanocrystals around the gas-liquid interface between H(2)S and water. EDTA plays important role as chelating ligand and capping reagent, which regulates the release of Zn(2+) ions for the formation of ZnS hollow spheres. The products were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), UV-vis spectroscopy, photoluminescence, and Raman spectroscopy. The obtained ZnS hollow spheres show a sharp and photostable UV emission approximately 370 nm, which is attributed to the recombination process associated with interstitial sulfur vacancy.
通过一种简便的乙二胺四乙酸（EDTA）介导的水热法成功合成了单分散的中空硫化锌微球。当反应温度从130℃变化到230℃时，中空球的尺寸在1.5至3.5微米之间变化。这些中空球的形成归因于H₂S与水之间气液界面周围硫化锌纳米晶体的定向聚集。EDTA作为螯合配体和封端剂发挥重要作用，它调节Zn²⁺离子的释放以形成硫化锌中空球。产物通过X射线衍射（XRD）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）、紫外可见光谱、光致发光和拉曼光谱进行表征。所获得的硫化锌中空球在约370nm处显示出尖锐且光稳定的紫外发射，这归因于与间隙硫空位相关的复合过程。
