高等学校化学学报 ›› 2015, Vol. 36 ›› Issue (4): 608.doi: 10.7503/cjcu20141079

• 研究论文: 无机化学 • 上一篇    下一篇

抗坏血酸还原亚碲酸钠水相合成CdTe量子点

谢宪1, 于梅花2, 张惠萍1, 王益林1()   

  1. 1. 广西大学化学化工学院
    2. 材料科学与工程学院, 南宁 530004
  • 收稿日期:2014-12-05 出版日期:2015-04-10 发布日期:2015-03-27
  • 作者简介:联系人简介: 王益林, 男, 博士, 副教授, 主要从事荧光纳米材料的合成与应用研究. E-mail: theanalyst@163.com
  • 基金资助:
    广西自然科学基金(批准号: 2014GXNSFAA118328)、 广西教育厅科研基金(批准号: 2013YB014)和广西大学“大学生创新创业训练计划”(批准号: 2014058)资助

Aqueous Synthesis of CdTe Quantum Dots via Ascorbic Acid Reducing Sodium Tellurite

XIE Xian1, YU Meihua2, ZHANG Huiping1, WANG Yilin1,*()   

  1. 1. School of Chemistry and Chemical Engineering
    2. School of Materials Science and Engineering, Guangxi University, Nanning 530004, China
  • Received:2014-12-05 Online:2015-04-10 Published:2015-03-27
  • Contact: WANG Yilin E-mail:theanalyst@163.com
  • Supported by:
    † Supported by the Guangxi Natural Science Foundation of China(No.2014GXNSFAA118328), the Scientific Research Fund of the Education Department of Guangxi, China(No.22013YB014) and the Foundation of College Students Innovation and Entrepreneurship Training of Guangxi University, China(No.22014058)

摘要:

在碱性条件下, 镉离子与巯基乙酸形成配合物(Cd-SCH2COO-), 亚碲酸钠中+4价的碲被抗坏血酸还原成-2价后与Cd-SCH2COO-配合物结合, 形成CdTe晶核; 经加热回流后晶核不断生长, 得到不同发射波长的CdTe量子点. 研究了反应时间、 巯基乙酸与镉及碲与镉的摩尔比等实验条件对CdTe量子点荧光性能的影响. 用X射线粉末衍射和透射电镜等分析手段对量子点的结构进行了表征. 结果表明, 采用这种方法制得的CdTe量子点为立方晶型, 荧光量子产率可达27.1%, 反应时间及反应物的相对用量对量子点的荧光性能有明显影响.

关键词: CdTe量子点, 光学性质, 发光

Abstract:

Cd-SCH2COO- complex was formed under basic condition, then the ascorbic acid reacted with Na2TeO3 to form Te2- ions that combined with Cd-SCH2COO- complex to give CdTe nucleus. With the CdTe nucleus growing under refluxing, CdTe quantum dots(QDs) with different emission colors were formed at last. The influence of experimental conditions, including refluxing time, thioglycolic acid to cadmium molar ratio and sodium tellurite to cadmium molar ratio, on the luminescent properties of the obtained CdTe QDs were systematically investigated. Furthermore, the obtained QDs were characterized by X-ray powder diffraction(XRD) and transmission electron microscopy(TEM). Experimental results showed that the proposed method enables us to obtain zinc-blended CdTe QDs with high photoluminescence quantum yield(up to 27.1%). The growth time and the relative quantities of reactants impacted the optical properties of QDs.

Key words: CdTe quantum dots, Optical property, Luminescence

中图分类号: 

TrendMD: