Preparation of biomass water-soluble carbon quantum dots and their application in Cr (VI) ions detection
Miao He
Research Center of Graphic Communication, Printing and Packaging Engineering, Wuhan University, Wuhan, China
Search for more papers by this authorXijun Fu
Research Center of Graphic Communication, Printing and Packaging Engineering, Wuhan University, Wuhan, China
School of Resources & Environment and Safety Engineering, University of South China, Hengyang, China
Search for more papers by this authorCorresponding Author
Guitao Du
Research Center of Graphic Communication, Printing and Packaging Engineering, Wuhan University, Wuhan, China
Correspondence
Xinghai Liu and Guitao Du, Research Center of Graphic Communication, Printing and Packaging Engineering, Wuhan University, Wuhan 430072, China.
Email: [email protected]; [email protected]
Search for more papers by this authorHoubin Li
Research Center of Graphic Communication, Printing and Packaging Engineering, Wuhan University, Wuhan, China
Search for more papers by this authorPing Ping Zhao
Research Center of Graphic Communication, Printing and Packaging Engineering, Wuhan University, Wuhan, China
Search for more papers by this authorCorresponding Author
Xinghai Liu
Research Center of Graphic Communication, Printing and Packaging Engineering, Wuhan University, Wuhan, China
Correspondence
Xinghai Liu and Guitao Du, Research Center of Graphic Communication, Printing and Packaging Engineering, Wuhan University, Wuhan 430072, China.
Email: [email protected]; [email protected]
Search for more papers by this authorMiao He
Research Center of Graphic Communication, Printing and Packaging Engineering, Wuhan University, Wuhan, China
Search for more papers by this authorXijun Fu
Research Center of Graphic Communication, Printing and Packaging Engineering, Wuhan University, Wuhan, China
School of Resources & Environment and Safety Engineering, University of South China, Hengyang, China
Search for more papers by this authorCorresponding Author
Guitao Du
Research Center of Graphic Communication, Printing and Packaging Engineering, Wuhan University, Wuhan, China
Correspondence
Xinghai Liu and Guitao Du, Research Center of Graphic Communication, Printing and Packaging Engineering, Wuhan University, Wuhan 430072, China.
Email: [email protected]; [email protected]
Search for more papers by this authorHoubin Li
Research Center of Graphic Communication, Printing and Packaging Engineering, Wuhan University, Wuhan, China
Search for more papers by this authorPing Ping Zhao
Research Center of Graphic Communication, Printing and Packaging Engineering, Wuhan University, Wuhan, China
Search for more papers by this authorCorresponding Author
Xinghai Liu
Research Center of Graphic Communication, Printing and Packaging Engineering, Wuhan University, Wuhan, China
Correspondence
Xinghai Liu and Guitao Du, Research Center of Graphic Communication, Printing and Packaging Engineering, Wuhan University, Wuhan 430072, China.
Email: [email protected]; [email protected]
Search for more papers by this authorMiao He and Xijun Fu contributed equally to this article.
Abstract
To quickly and quantitatively detect the concentration of harmful Cr6+ in food and packaging, biomass nitrogen-doped blue fluorescent carbon quantum dots (CQDs) were synthesized by a one-step hydrothermal method using longan peel. The synthesized biomass CQDs are spherical, and the particle size is distributed between 1 and 6 nm. There are functional groups such as carboxyl, hydroxyl and amino groups on the surface of the CQDs, which promotes the excellent water dispersibility of the CQDs. CQDs have good fluorescence stability in salt solutions, different pH environments and long-term storage. A fluorescence sensor for detecting Cr6+ was constructed, based on the specific quenching effect of Cr6+ on the fluorescence of CQDs. There is a good linear relationship between the fluorescence quenching rate of the fluorescence sensor and the Cr6+ concentration of the detected sample. The sensor has a linear range of 20–200 μM and a detection limit of 1.4 μM. In addition, the CQDs fluorescence sensor has an ideal recovery rate in the actual water sample spiked with Cr6+. This research innovatively combined longan and hydrothermal method to prepare a quantitative, fast and wide detection limit Cr6+ sensor.
Open Research
DATA AVAILABILITY STATEMENT
The data that support the findings of this study are available from the corresponding author, [Liu], upon reasonable request.
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