硅量子点的控制合成、表征及对Cu<sup>2+</sup>的高灵敏传感

刘振平; 庞钶靖; 姜容; 甘芳瑗; 夏明星; 聂青玉

doi:10.37188/CJL.20200292

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硅量子点的控制合成、表征及对Cu²⁺的高灵敏传感

材料合成及性能 | 更新时间：2021-01-12

- 硅量子点的控制合成、表征及对Cu²⁺的高灵敏传感
- Synthesis, Characterization of Silicon Quantum Dots and High Sensitivity Sensing for Cu²⁺
- 发光学报 2021年42卷第1期页码：73-82
- 作者机构：
  
  1.重庆安全技术职业学院, 重庆 404020
  2.重庆海关技术中心, 重庆 400020
  3.重庆三峡职业学院, 重庆 404155
- 作者简介：
  
  [ "刘振平(1986-), 男, 内蒙古赤峰人, 博士研究生, 副教授, 2012年于西华大学获得硕士学位, 主要从事生化传感器在食品安全检测方面的研究、开发与应用。E-mail:nping305@126.com" ]
  [ "夏明星(1982-), 男, 重庆万州人, 硕士, 高级工程师, 2008年于江南大学获得硕士学位, 主要从事食品营养与安全检测的研究。E-mail:3199170@qq.com" ]
  [ "聂青玉(1974-), 女, 重庆万州人, 硕士, 教授, 硕士研究生导师, 2009年于西南大学获得硕士学位, 主要从事农产品贮藏加工、食品检测、食品营养等方面的研究。E-mail:nqy318@163.com" ]
- 基金信息：
  
  重庆市教育委员会高校创新研究群体项目(CXQTP19037);重庆市教育委员会科学技术研究计划青年项目(KJQN201804703)
- DOI：10.37188/CJL.20200292
  中图分类号： O482.31
- 收稿：2020-10-06，
  
  录用：2020-10-26，
  
  纸质出版：2021-01
- 稿件说明：
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刘振平, 庞钶靖, 姜容, 等. 硅量子点的控制合成、表征及对Cu²⁺的高灵敏传感[J]. 发光学报, 2021,42(1):73-82.

Zhen-ping LIU, Ke-jing PANG, Rong JIANG, et al. Synthesis, Characterization of Silicon Quantum Dots and High Sensitivity Sensing for Cu²⁺[J]. Chinese Journal of Luminescence, 2021, 42(1): 73-82.
刘振平, 庞钶靖, 姜容, 等. 硅量子点的控制合成、表征及对Cu²⁺的高灵敏传感[J]. 发光学报, 2021,42(1):73-82. DOI： 10.37188/CJL.20200292.

Zhen-ping LIU, Ke-jing PANG, Rong JIANG, et al. Synthesis, Characterization of Silicon Quantum Dots and High Sensitivity Sensing for Cu²⁺[J]. Chinese Journal of Luminescence, 2021, 42(1): 73-82. DOI： 10.37188/CJL.20200292.

摘要

通过一步无溶剂法合成了具有较好发光稳定性和水溶性的硅量子点（Silicon quantum dots，Si-QDs），并利用透射电镜（TEM）、红外吸收光谱（IR）、X射线光电子能谱（XPS）、X射线衍射（XRD）和荧光光谱等手段对其进行了表征。试验发现，Si-QDs在378 nm的激发光照射下，可产生峰值位于468 nm的宽带发光；在水溶液中，添加适量Cu

可对Si-QDs的发光产生静态猝灭。利用荧光信号猝灭程度与Cu

浓度之间稳定的相关性可实现对Cu

的定量检测。优化条件下，Si-QDs荧光强度变化与Cu

浓度在16.7~1 670 nmol·L

-1

范围内呈稳定的线性相关性，（

－

）/

=0.18808ln

（Cu

）－0.41377（

=0.998），检出限低至4.7 nmol·L

-1

（

=3）。对多种实际水样品做了加标回收率试验，回收率介于89.47%~106.75%之间。本研究制备的Si-QDs用于水中Cu

快速、高灵敏检测具有良好重复性和稳定性。

Abstract

In this study

silicon quantum dots(Si-QDs) with good luminous stability and water solubility were synthesized by one-pot solvent-free method and characterized by the transmission electron microscopy(TEM)

infrared spectroscopy(IR)

X-ray photoelectron spectroscopy(XPS)

X-ray diffraction(XRD) and fluorescence spectroscopy. It was found in the experiment that the Si-QDs emit broadband luminescence at 478 nm under the excitation at 378 nm. The luminescence of Si-QDs can be quenched statically by adding Cu

in aqueous solution. The stable correlation between the degree of quenching of fluorescence signal and the concentrations of Cu

was used to realize the quantitative detection of Cu

. Under the optimized conditions

there was a stable correlation between the fluorescence intensity change of Si-QDs and the concentrations of Cu

in the range of 16.7-1 670 nmol·L

-1

(

=0.18808ln

(Cu

)-0.41377(

=0.998)

and the detection limit was down to 4.7 nmol·L

-1

(

=3). Several actual water samples were detected

the recovery rates ranged from 89.47% to 106.75%. The Si-QD prepared in this study had good repeatability and stability for the rapid and highly sensitive detection of Cu

in water.

关键词

Keywords

references

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硅量子点的控制合成、表征及对Cu2+的高灵敏传感

Synthesis, Characterization of Silicon Quantum Dots and High Sensitivity Sensing for Cu2+

DOI：10.37188/CJL.20200292

摘要

Abstract

关键词

Keywords

references

硅量子点的控制合成、表征及对Cu²⁺的高灵敏传感

Synthesis, Characterization of Silicon Quantum Dots and High Sensitivity Sensing for Cu²⁺