Facile one-step synthesis of highly luminescent N-doped carbon dots as an efficient fluorescent probe for chromium(vi) detection based on the inner filter effect. (9th February 2018)

• Record Type: Journal Article
• Authors: Wang, Haitao; Liu, Shan; Xie, Yisha; Bi, Jingran; Li, Yao; Song, Yukun; Cheng, Shasha; Li, Dongmei; Tan, Mingqian
• Is Part Of: New journal of chemistry. Volume 42:Number 5(2018)
• Page Start: 3729
• Page End: 3735
• Publication Date: 2018-02-09
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/c8nj00216a
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : Label-free fluorescence assay system is designed for Cr(iv ) detection. Abstract : Chromium is highly toxic and considered as a severe contaminate. Therefore, low cost, highly sensitive sensors for the determination of Cr(vi ) are highly required. In the present study, highly luminescent N-doped carbon dots (CG-CDs) obtained from citric acid and glycine with a quantum yield of 78% and label-free fluorescent assay system were designed for Cr(vi ) detection based on the inner filter effect (IFE). The CG-CDs were prepared by a one-step hydrothermal method using citric acid and glycine as carbon precursors. The fluorescent sensors showed rapid response, high selectivity, and sensitivity to Cr(vi ). A good linear relationship between the concentration of Cr(vi ) ions and fluorescence intensity was obtained in the range from 5 to 200 μmol L −1 ( R 2 = 0.98), and the limit of detection was calculated to be 4.16 μmol L −1 for Cr(vi ). Importantly, this method has been successfully applied to the detection of Cr(vi ) ions in simulated aquaculture water, which may be helpful to reduce the risk of Cr(vi ) intake from contaminated water.