ZnO@GQDs核壳结构量子点的制备及性能研究

施周; 贺英; 蔡计杰; 王鑫楠; 何超奇; 唐先斌; 王均安

doi:10.3788/fgxb20143502.0137

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ZnO@GQDs核壳结构量子点的制备及性能研究

材料合成及性能 | 更新时间：2020-08-12

- ZnO@GQDs核壳结构量子点的制备及性能研究
- Synthesis and Characterization of ZnO@Graphene Quantum Dots with Core-shell Structure
- 发光学报 2014年35卷第2期页码：137-141
- 作者机构：
  
  1. 上海大学材料科学与工程学院高分子材料系上海,200072
  2. 上海大学材料科学与工程学院材料研究所上海,200072
- 作者简介：
- 基金信息：
  
  上海市科委重点纳米技术专项基金（1052nm07400）资助项目()
- DOI：10.3788/fgxb20143502.0137
  中图分类号： O482.31
- 收稿日期：2013-08-23，
  
  修回日期：2013-11-20，
  
  纸质出版日期：2014-02-03
- 稿件说明：
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施周, 贺英, 蔡计杰等. ZnO@GQDs核壳结构量子点的制备及性能研究[J]. 发光学报, 2014,35(2): 137-141

SHI Zhou, HE Ying, CAI Ji-jie etc. Synthesis and Characterization of ZnO@Graphene Quantum Dots with Core-shell Structure[J]. Chinese Journal of Luminescence, 2014,35(2): 137-141
施周, 贺英, 蔡计杰等. ZnO@GQDs核壳结构量子点的制备及性能研究[J]. 发光学报, 2014,35(2): 137-141 DOI： 10.3788/fgxb20143502.0137.

SHI Zhou, HE Ying, CAI Ji-jie etc. Synthesis and Characterization of ZnO@Graphene Quantum Dots with Core-shell Structure[J]. Chinese Journal of Luminescence, 2014,35(2): 137-141 DOI： 10.3788/fgxb20143502.0137.

摘要

采用原位聚合法制备了以ZnO量子点为核、石墨烯量子点（GQDs）为壳的ZnO@ GQDs核壳结构量子点。通过TEM和HR-TEM对量子点进行形貌和结构的分析表征。结果表明，合成的ZnO@ GQDs核壳结构量子点为球形，粒径为～7 nm，且尺寸均匀。PL光谱研究表明，新型量子点的发射峰位于369 nm，发光峰窄、强度高;相对于ZnO的本征发射峰，GQDs的引入使得ZnO@GQDs核壳量子点的荧光发射峰出现蓝移、强度变高，从而使复合量子点的荧光具有较纯的色度和较高的强度，说明GQDs的引入具有协同优化效应。该量子点有望应用于LED显示器件。

Abstract

Graphene quantum dots (GQDs) were prepared by hydrothermal approach. ZnO@ Graphene quantum dots(ZnO@ GQDs) core/shell quantum dots were synthesized by

in-situ

polymerization. The morphology

structure and the optical properties of the samples were characterized by TEM

HR-TEM

XRD

UV-Vis and PL

respectively. The results show that ZnO@ GQDs core/shell quantum dots are spherical and good dispersible with a uniform particle size of ～7 nm. The GQDs shell was coated on the surface of ZnO QDs and formed the ZnO@ GQDs core/shell structure QDs. The blue shift and higher intensity of core/shell QDs compared with the pure ZnO QDs were observed in PL spectra

which suggested the introduction of the GQDs induced a synergistic luminescence effect. This novel material may be a potential candidate for LED display device.

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references

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