碳点嫁接海藻酸钙复合结构的制备及其对Cu2+的检测

赵清; 常青; 杨金龙; 刘俊; 胡胜亮

doi:10.3788/fgxb20143503.0387

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碳点嫁接海藻酸钙复合结构的制备及其对Cu²⁺的检测

发光学应用及交叉前沿 | 更新时间：2020-08-12

- 碳点嫁接海藻酸钙复合结构的制备及其对Cu²⁺的检测
- Preparation of Complex Carbon-dot-grafted Calcium Alginate and Its Application as Fluorescent Sensor for Cu²⁺
- 发光学报 2014年35卷第3期页码：387-392
- 作者机构：
  
  1. 中北大学仪器科学与动态测度教育部重点实验室, 电子测试技术国家重点实验室,山西太原,030051
  2. 中北大学材料科学与工程学院,山西太原,030051
  3. 清华大学新型陶瓷与精细工艺国家重点实验室北京,100084
- 作者简介：
- 基金信息：
  
  国家自然科学基金（51272301，50902126，51172214，51172120）();2010年山西省高等学校优秀青年学术带头人项目();中国博士后基金面上项
- DOI：10.3788/fgxb20143503.0387
  中图分类号： O657.3;O482.31
- 收稿日期：2013-09-24，
  
  修回日期：2013-11-25，
  
  纸质出版日期：2014-03-03
- 稿件说明：
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赵清, 常青, 杨金龙等. 碳点嫁接海藻酸钙复合结构的制备及其对Cu2+的检测[J]. 发光学报, 2014,35(3): 387-392

ZHAO Qing, CHANG Qing, YANG Jin-long etc. Preparation of Complex Carbon-dot-grafted Calcium Alginate and Its Application as Fluorescent Sensor for Cu2+[J]. Chinese Journal of Luminescence, 2014,35(3): 387-392
赵清, 常青, 杨金龙等. 碳点嫁接海藻酸钙复合结构的制备及其对Cu2+的检测[J]. 发光学报, 2014,35(3): 387-392 DOI： 10.3788/fgxb20143503.0387.

ZHAO Qing, CHANG Qing, YANG Jin-long etc. Preparation of Complex Carbon-dot-grafted Calcium Alginate and Its Application as Fluorescent Sensor for Cu2+[J]. Chinese Journal of Luminescence, 2014,35(3): 387-392 DOI： 10.3788/fgxb20143503.0387.

摘要

基于铜离子与碳点的荧光猝灭作用，建立了用碳点作为荧光探针来检测铜离子的新方法。该方法将碳点还原后再嫁接于海藻酸钙，从而得到一种新型的含还原碳点的海藻酸钙薄膜荧光探针。用荧光分光光度计和紫外-可见分光光度计对探针的荧光特性以及探针与金属离子的相互作用进行了研究。研究结果表明：改性后的荧光探针具有很高的荧光强度，因此可以根据探针荧光强度的变化实现对铜离子的检测，并通过乙二胺四乙酸二钠（EDTA）的作用实现对铜离子的重复检测。铜离子浓度在510

-6

~10010

-6

molL

-1

范围内与该荧光探针的荧光猝灭强度呈良好的线性关系。该方法不仅可以对铜离子检测，更实现了对碳点的固载，该技术有望实现荧光探针的回收再利用。

Abstract

A novel method for detecting Cu

ion was developed based on the fluorescence quenching effect of copper ion on carbon dots (CDs). The fluorescent probe was prepared by grafting reduced carbon dots (rCDs) in calcium alginate to form a calcium alginate film (CA-rCDs). Fluorescence characteristics of the probe and interaction between the probe and metal ions were studied using fluorescence spectrophotometer and UV-Vis spectrophotometer. The results show that the fluorescence intensity of the novel probe is strong and varied with the concentration of Cu

. Moreover

the quenched fluorescence intensity of probe is linearly proportional to the concentration of Cu

in the range from 510

-6

to 10010

-6

molL

-1

. In addition

it is found that the probe can detect Cu

repeatedly by using EDTA. This method is not only suitable for the detection of Cu

but also can realize the immobilization of CDs

ensuring the probe to be recycled and reused.

关键词

Keywords

references

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