Optical Dual-mode and Smartphone Imaging for Cr（Ⅵ） Detection Based on Manganese，Chlorine and Nitrogen Co-doped Carbon Dots

LIANG Mei-qi; WANG Zi-han; LIU Yang; DONG Chuan; GONG Xiao-juan

doi:10.12452/j.fxcsxb.23082401

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Optical Dual-mode and Smartphone Imaging for Cr（Ⅵ） Detection Based on Manganese，Chlorine and Nitrogen Co-doped Carbon Dots

Scientific Papers | 更新时间：2024-01-17

- Optical Dual-mode and Smartphone Imaging for Cr（Ⅵ） Detection Based on Manganese，Chlorine and Nitrogen Co-doped Carbon Dots
- Journal of Instrumental Analysis Vol. 43, Issue 1, Pages: 182-190(2024)
- 作者机构：
  
  山西大学环境科学研究所，山西太原 030006
- 作者简介：
- 基金信息：
- DOI：10.12452/j.fxcsxb.23082401
  CLC： O657.3;O614.61
- Published：15 January 2024，
  
  Received：24 August 2023，
  
  Revised：15 October 2023，
- 稿件说明：
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梁美琪,王子涵,刘洋等.基于锰、氯、氮共掺杂碳点的光学双模和智能手机成像检测Cr（Ⅵ）[J].分析测试学报,2024,43(01):182-190.

LIANG Mei-qi,WANG Zi-han,LIU Yang,et al.Optical Dual-mode and Smartphone Imaging for Cr（Ⅵ） Detection Based on Manganese，Chlorine and Nitrogen Co-doped Carbon Dots[J].Journal of Instrumental Analysis,2024,43(01):182-190.
梁美琪,王子涵,刘洋等.基于锰、氯、氮共掺杂碳点的光学双模和智能手机成像检测Cr（Ⅵ）[J].分析测试学报,2024,43(01):182-190. DOI： 10.12452/j.fxcsxb.23082401.

LIANG Mei-qi,WANG Zi-han,LIU Yang,et al.Optical Dual-mode and Smartphone Imaging for Cr（Ⅵ） Detection Based on Manganese，Chlorine and Nitrogen Co-doped Carbon Dots[J].Journal of Instrumental Analysis,2024,43(01):182-190. DOI： 10.12452/j.fxcsxb.23082401.

摘要

六价铬［Cr（Ⅵ）］具有毒性和致癌性，严重威胁人类健康，因此开发快速、灵敏、精准检测Cr（Ⅳ）的方法具有重要意义。该研究以邻苯二胺、对氨基苯甲酸、氯化锰和浓盐酸为反应前体，通过一步水热法合成了锰、氯、氮共掺杂碳点（Mn，Cl，N-CDs）。Mn，Cl，N-CDs能发出明亮且稳定的红色荧光，荧光量子产率为5.3%。基于聚集诱导和动态猝灭效应，Cr（Ⅵ）可使Mn，Cl，N-CDs的荧光强度和吸光度发生显著变化，基于此，开发了荧光和比色双模传感器及智能手机成像法，实现了Cr（Ⅵ）的灵敏检测。荧光法和比色法检测Cr（Ⅵ）的线性范围分别为33.8~469.5 μmol/L和2.4~80.7 μmol/L，智能手机成像检测Cr（Ⅵ）的线性范围为20.0~160.0 μmol/L（可见光辐照）和80.0~170.0 μmol/L（紫外光辐照）。该文不仅成功构建了智能手机成像定量检测Cr（Ⅵ）的传感器，同时为基于碳量子点构筑智能、便携、可视化传感器提供了新思路。

Abstract

Hexavalent chromium［Cr（Ⅵ）］ is toxic and carcinogenic，posing a significant threat to human health. Therefore，the development of rapid，sensitive and accurate methods for detecting Cr（Ⅵ） is of great importance. Herein，manganese，chlorine and nitrogen co-doped carbon dots（Mn，Cl，N-CDs） were synthesized by a one-step hydrothermal method using

-phenylenediamine，

-aminobenzoic acid，manganese chloride and concentrated hydrochloric acid as reaction precursors. Mn，Cl，N-CDs can emit bright and stable red fluorescence with a fluorescence quantum yield of 5.3%. Based on the aggregation-induced and dynamic quenching effects，the addition of Cr（Ⅵ） leads to a significant change in the fluorescence intensity and absorbance of Mn，Cl，N-CDs. Consequently，a dual-mode sensor for fluorescence and colorimetry，along with a smartphone imaging method，was developed to achieve sensitive detection of Cr（Ⅵ）. The linear ranges of Cr（Ⅵ） were 33.8-469.5 μmol/L and 2.4-80.7 μmol/L for fluorescence and colorimetric methods，respectively，and 20.0-160.0 μmol/L（visible light irradiation） and 80.0-170.0 μmol/L（UV irradiation） for smartphone imaging. This paper not only successfully constructed a sensor for the quantitative detection of Cr（Ⅵ） using smartphone imaging，but also introduced an innovative approach for creating intelligent，portable and visual sensors based on CDs.

关键词

锰、氯、氮共掺杂碳点光学双模智能手机成像Cr（Ⅵ）

Keywords

manganese，chlorine and nitrogen co-doped carbon dotsoptical dual-modesmartphone imagingCr（Ⅵ）

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