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Original Research Full Papers
mosaab echabaane
Centre for Research on Microelectronics and Nanotechnology CRMN of Technopark of Sousse B.P.334
Corresponding Author
ORCiD: https://orcid.org/0000-0001-9230-3815
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This work is licensed under a CC BY 4.0 License. Read Full License
The fast and sensitive detection of copper ions would be essential for water monitoring. Herein, we report a novel development of impedimetric sensor based on carbon dots/chitosan nanocomposite. Carbon dots (CDs) were synthesized by simple heating of acidic aqueous solution of glucose. The CDs were characterized by TEM, FTIR, XRD, UV-visible, and PL. These measurements revealed that the CDs possess a mean size of 3.2 nm, graphitic structure with carboxyl and hydroxyl groups on the surface, and show particular optical properties. A glassy carbon electrode (GCE) was modified with a carbon dots/chitosan (CHITO) nanocomposite, and was characterized by transmission electron microscopy and electrochemical impedance spectroscopy (EIS). The CDs-CHITO/GCE electrode exhibits large surface area, good conductivity film, and charge transfer at interface film/electrolyte. The proposed impedimetric sensor exhibits a linear response to Cu(II) over 10-9 M to 10-5 M rang with a limit of detection at about 5×10-10 M. In addition, the sensor shows good selectivity toward Cu(II) ions, which is less than 5 %.
Therefore, the as-developed impedimetric sensor exhibits good reproducibility, stability, selectivity, and a low limit of detection, which augur well for its application in water safety control processes.
Keywords
Carbon Dots, Chitosan, Nanocomposite, Copper(II), Impedimetric sensors
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A new preprint design is coming!
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This is a preprint, a preliminary version of a manuscript that has not completed peer review at a journal. Research Square does not conduct peer review prior to posting preprints. The posting of a preprint on this server should not be interpreted as an endorsement of its validity or suitability for dissemination as established information or for guiding clinical practice.
Original Research Full Papers
mosaab echabaane
Centre for Research on Microelectronics and Nanotechnology CRMN of Technopark of Sousse B.P.334
Corresponding Author
ORCiD: https://orcid.org/0000-0001-9230-3815
Badges
Prescreen
This manuscript passed our Prescreen assessment
Complete author information
Appropriate declaration statements
Potential risks to human health
Prescreen
History
CURRENT STATUS: Posted
Version 1
Posted 08 Feb, 2021
No community comments so far
Metrics
Comments: 0
PDF Downloads: ...
HTML Views: ...
License:
This work is licensed under a CC BY 4.0 License. Read Full License
The fast and sensitive detection of copper ions would be essential for water monitoring. Herein, we report a novel development of impedimetric sensor based on carbon dots/chitosan nanocomposite. Carbon dots (CDs) were synthesized by simple heating of acidic aqueous solution of glucose. The CDs were characterized by TEM, FTIR, XRD, UV-visible, and PL. These measurements revealed that the CDs possess a mean size of 3.2 nm, graphitic structure with carboxyl and hydroxyl groups on the surface, and show particular optical properties. A glassy carbon electrode (GCE) was modified with a carbon dots/chitosan (CHITO) nanocomposite, and was characterized by transmission electron microscopy and electrochemical impedance spectroscopy (EIS). The CDs-CHITO/GCE electrode exhibits large surface area, good conductivity film, and charge transfer at interface film/electrolyte. The proposed impedimetric sensor exhibits a linear response to Cu(II) over 10-9 M to 10-5 M rang with a limit of detection at about 5×10-10 M. In addition, the sensor shows good selectivity toward Cu(II) ions, which is less than 5 %.
Therefore, the as-developed impedimetric sensor exhibits good reproducibility, stability, selectivity, and a low limit of detection, which augur well for its application in water safety control processes.
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
Figure 8
Figure 9
Figure 10
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