表面活性剂对硫化锌纳米晶水热生长影响的微观结构研究  

Microstructural Study on Effects of Surfactant on the Hydrothermal Growth of Zn S Nanocrystals

作　　者：许杰[1] 徐甲强[2] 胡鹏飞[1] 闵娜[1] 李强[1] 

机构地区：[1]上海大学微结构重点实验室,上海200444 [2]上海大学理学院,上海200444

出　　处：《实验室研究与探索》2015年第6期34-37,共4页Research and Exploration In Laboratory

基　　金：上海高校教师产学研践习计划(B.60-B312-13-001)

摘　　要：为了探究表面活性剂影响下硫化锌纳米晶的微观结构,以醋酸锌和吡咯啶二硫代氨基甲酸铵为原料,在表面活性剂十二烷基苯磺酸钠辅助下水热反应合成了具有纤锌矿和闪锌矿混合结构的硫化锌纳米晶。运用XRD、TEM及选区电子衍射对多种形态和粒径的纳米颗粒进行了表征。结果显示,产物中纤锌矿成分的比例随表面活性剂用量的增多而增大,同时纳米颗粒趋于粒径减小,粒径尺寸分布变宽,形态出现多样化,包括球形、多面体形以及六方片状,另外,高分辨透射电镜解析显示,颗粒中存在大量的孪晶和位错,许多相邻颗粒出现了取向连接生长。对表面活性剂在硫化锌水热合成过程中所起的作用及纳米颗粒的生长机理做了推测。To research the microstructure of zinc sulfide nanocrystals under the influence of surfactant,the zinc sulfide nanocrystals with the wurtzite and zinc blende two phase structures were prepared by a hydrothermal process in which zinc acetate,ammonium pyrrolidine dithiocarbamate were used as zinc source and sulfide source respectively. Sodium dodecyl benzene sulfonate was added as surfactant. The as-prepared nanocrystals were characterized by the XRD（ X-ray diffraction）,TEM（ transmission electron microscopy） and SAED（ selected area electron diffraction）. The results showed that the proportion of wurtzite in products increased with the increase of surfactant,simultaneously,the particle sizes became smaller,and the shapes diversified into sphericity,hexagonal flake and polyhedral shape. What is more,images of HRTEM revealed larges of twins and dislocations,many contiguous particles grew through oriented attachment.In addition,there were lots of twins and dislocations in nanoparticles. The function of surfactant in the hydrothermal synthesis and the growth mechanism of nanoparticles were proposed.

关 键 词：水热反应 表面活性剂 硫化锌 纳米结构 孪晶 

分 类 号：O611.4[理学—无机化学]