Ammonium citrate derived carbon quantum dot as on-off-on fluorescent sensor for detection of chromium(VI) and sulfites

被引：42

作者：

Fang, Liyang ^{[1
]}

Zhang, Lu ^{[1
]}

Chen, Zhenzhen ^{[1
]}

Zhu, Chaosheng ^{[1
]}

Liu, Juanjuan ^{[1
]}

Zheng, Jingtang ^{[1
,2
]}

机构：

[1] China Univ Petr, Sch Chem Engn, State Key Lab Heavy Oil Proc, Qingdao 266580, Peoples R China

[2] Fudan Univ, State Key Lab Mol Engn Polymers, Shanghai, Peoples R China

来源：

MATERIALS LETTERS | 2017年 / 191卷

基金：

中国国家自然科学基金;

关键词：

Ammonium citrate derived C-dots; On-off-on fluorescent probe; Electron exchange quenching; The detections of Cr(VI) and sulfites;

D O I：

10.1016/j.matlet.2016.12.098

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The ammonium citrate derived carbon quantum dot (C-dots) with strong fluorescence and high photostability were synthesized via one-step hydrothermal approach. Based on fluorescence quenching and fluorescence recovery of C-dots, the as-prepared C-dots were innovatively developed as an effective on-off-on fluorescent probe for selective and sensitive detection of Cr(VI) and sulfites with detection limit 0.01 mu mol/L and 0.35 mu mol/L, respectively. It is found that mechanism of fluorescence quenching of the as-prepared C-dots by Cr(VI) can be mainly attributed to a kind of electron exchange quenching. (C) 2016 Published by Elsevier B.V.

引用

页码：1 / 4

页数：4

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