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Graphene oxide-assisted synthesis of N, S Co-doped carbon quantum dots for fluorescence detection of multiple heavy metal ions.

Authors
  • Shen, Yujie1
  • Rong, Mingcong1
  • Qu, Xiaodan2
  • Zhao, Bolin1
  • Zou, Jinhui1
  • Liu, Zhenbang3
  • Bao, Yu1
  • He, Ying1
  • Li, Siyi1
  • Wang, Xiaojin1
  • Chen, Meiyun1
  • Chen, Kaiying1
  • Zhang, Yuwei4
  • Niu, Li5
  • 1 Center for Advanced Analytical Science, c/o School of Chemistry and Chemical Engineering, Guangzhou Key Laboratory of Sensing Materials & Devices, Guangzhou University, Guangzhou, 510006, China. , (China)
  • 2 Center for Advanced Analytical Science, c/o School of Chemistry and Chemical Engineering, Guangzhou Key Laboratory of Sensing Materials & Devices, Guangzhou University, Guangzhou, 510006, China; State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Science, Changchun, 130022, China; University of Science and Technology of China, Hefei, 230026, China. , (China)
  • 3 Center for Advanced Analytical Science, c/o School of Chemistry and Chemical Engineering, Guangzhou Key Laboratory of Sensing Materials & Devices, Guangzhou University, Guangzhou, 510006, China; School of Computer Science and Cyber Engineering, Guangzhou University, Guangzhou, 510006, China. , (China)
  • 4 Center for Advanced Analytical Science, c/o School of Chemistry and Chemical Engineering, Guangzhou Key Laboratory of Sensing Materials & Devices, Guangzhou University, Guangzhou, 510006, China. Electronic address: [email protected] , (China)
  • 5 Center for Advanced Analytical Science, c/o School of Chemistry and Chemical Engineering, Guangzhou Key Laboratory of Sensing Materials & Devices, Guangzhou University, Guangzhou, 510006, China. Electronic address: [email protected] , (China)
Type
Published Article
Journal
Talanta
Publication Date
May 01, 2022
Volume
241
Pages
123224–123224
Identifiers
DOI: 10.1016/j.talanta.2022.123224
PMID: 35066284
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

Detection of heavy metal ions (HMIs) in water is an important topic in the field of analytical chemistry and environmental science. Fluorescence spectroscopy is one of the most promising strategies due to its simple instrument, low investment, rapid and convenient operation. However, current fluorescence probes for detecting HMIs are typically selective for certain ions. Herein we reported the development of a novel strategy that determined the total content of HMIs in water by fluorescence spectroscopy. A novel fluorescent nitrogen, sulfur co-doped carbon quantum dots (N, S-CQDs) was prepared via graphene oxide-assisted synthesis method. The results showed that, with the fluorescence quenching strategy, N, S-CQDs exhibited a wide linear response to a series of water-soluble metal ions. The fluorescence of N, S-CQDs is stable in a wide range of pH 4-11. The detection mechanism was proved that the integration, caused by coordination interaction between S element in N, S-CQDs and the d-orbital of associated metal ions, was the main reason for fluorescence quenching. In practice, the N, S-CQDs were applied to determine total content of HMIs in water successfully. Interestingly, further experiment proved that the N, S-CQDs could effectively remove HMIs in water after centrifuging and filtering thoroughly. It was shown that the fluorescence of N, S-CQDs was obviously quenched by the multiple-ions-involved water and scavenging effect of N, S-CQDs on HMIs with centrifugal in which the concentration of individuals meets the Chinese National Standard. This indicates that the N, S-CQDs are of a wide application prospect in water quality analysis. Copyright © 2022 Elsevier B.V. All rights reserved.

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