Cargando…

Carbon Quantum Dot-Incorporated Chitosan Hydrogel for Selective Sensing of Hg(2+) Ions: Synthesis, Characterization, and Density Functional Theory Calculation

[Image: see text] A carbon quantum dot-based chitosan hydrogel was prepared in this work as a fluorescence sensor for the selective sensing of Hg(2+) ions. Among the eight tested metal ions, the prepared hydrogel exhibited remarkable sensing selectivity and sensitivity toward Hg(2+). The results dem...

Descripción completa

Detalles Bibliográficos
Autores principales: Yan, Xiangyu, Rahman, Shofiur, Rostami, Masoumeh, Tabasi, Zahra A., Khan, Faisal, Alodhayb, Abdullah, Zhang, Yan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2021
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8444287/
https://www.ncbi.nlm.nih.gov/pubmed/34549147
http://dx.doi.org/10.1021/acsomega.1c03557
_version_ 1784568458354098176
author Yan, Xiangyu
Rahman, Shofiur
Rostami, Masoumeh
Tabasi, Zahra A.
Khan, Faisal
Alodhayb, Abdullah
Zhang, Yan
author_facet Yan, Xiangyu
Rahman, Shofiur
Rostami, Masoumeh
Tabasi, Zahra A.
Khan, Faisal
Alodhayb, Abdullah
Zhang, Yan
author_sort Yan, Xiangyu
collection PubMed
description [Image: see text] A carbon quantum dot-based chitosan hydrogel was prepared in this work as a fluorescence sensor for the selective sensing of Hg(2+) ions. Among the eight tested metal ions, the prepared hydrogel exhibited remarkable sensing selectivity and sensitivity toward Hg(2+). The results demonstrated that a prominent fluorescence quenching at 450 nm was observed in the presence of Hg(2+) with a linear response range of 0–100.0 nM and an estimated limit of detection of 9.07 nM. The as-prepared hydrogel demonstrates pH-dependent fluorescence intensity and sensitivity. The highest fluorescence intensity and sensitivity were obtained under pH 5.0. The excellent sensing selectivity could be attributed to a strong interaction between the hydrogel film and Hg(2+) ions to form complexes, which provokes an effective electron transfer for fluorescence quenching. Results from density functional theory (DFT) calculation confirm that the interaction energies (ΔIE) of the hydrogel with three toxic metal ions (Hg(2+), Cd(2+), and Pb(2+)) are in the following order: Hg(2+) > Cd(2+) > Pb(2+).
format Online
Article
Text
id pubmed-8444287
institution National Center for Biotechnology Information
language English
publishDate 2021
publisher American Chemical Society
record_format MEDLINE/PubMed
spelling pubmed-84442872021-09-20 Carbon Quantum Dot-Incorporated Chitosan Hydrogel for Selective Sensing of Hg(2+) Ions: Synthesis, Characterization, and Density Functional Theory Calculation Yan, Xiangyu Rahman, Shofiur Rostami, Masoumeh Tabasi, Zahra A. Khan, Faisal Alodhayb, Abdullah Zhang, Yan ACS Omega [Image: see text] A carbon quantum dot-based chitosan hydrogel was prepared in this work as a fluorescence sensor for the selective sensing of Hg(2+) ions. Among the eight tested metal ions, the prepared hydrogel exhibited remarkable sensing selectivity and sensitivity toward Hg(2+). The results demonstrated that a prominent fluorescence quenching at 450 nm was observed in the presence of Hg(2+) with a linear response range of 0–100.0 nM and an estimated limit of detection of 9.07 nM. The as-prepared hydrogel demonstrates pH-dependent fluorescence intensity and sensitivity. The highest fluorescence intensity and sensitivity were obtained under pH 5.0. The excellent sensing selectivity could be attributed to a strong interaction between the hydrogel film and Hg(2+) ions to form complexes, which provokes an effective electron transfer for fluorescence quenching. Results from density functional theory (DFT) calculation confirm that the interaction energies (ΔIE) of the hydrogel with three toxic metal ions (Hg(2+), Cd(2+), and Pb(2+)) are in the following order: Hg(2+) > Cd(2+) > Pb(2+). American Chemical Society 2021-09-03 /pmc/articles/PMC8444287/ /pubmed/34549147 http://dx.doi.org/10.1021/acsomega.1c03557 Text en © 2021 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by-nc-nd/4.0/Permits non-commercial access and re-use, provided that author attribution and integrity are maintained; but does not permit creation of adaptations or other derivative works (https://creativecommons.org/licenses/by-nc-nd/4.0/).
spellingShingle Yan, Xiangyu
Rahman, Shofiur
Rostami, Masoumeh
Tabasi, Zahra A.
Khan, Faisal
Alodhayb, Abdullah
Zhang, Yan
Carbon Quantum Dot-Incorporated Chitosan Hydrogel for Selective Sensing of Hg(2+) Ions: Synthesis, Characterization, and Density Functional Theory Calculation
title Carbon Quantum Dot-Incorporated Chitosan Hydrogel for Selective Sensing of Hg(2+) Ions: Synthesis, Characterization, and Density Functional Theory Calculation
title_full Carbon Quantum Dot-Incorporated Chitosan Hydrogel for Selective Sensing of Hg(2+) Ions: Synthesis, Characterization, and Density Functional Theory Calculation
title_fullStr Carbon Quantum Dot-Incorporated Chitosan Hydrogel for Selective Sensing of Hg(2+) Ions: Synthesis, Characterization, and Density Functional Theory Calculation
title_full_unstemmed Carbon Quantum Dot-Incorporated Chitosan Hydrogel for Selective Sensing of Hg(2+) Ions: Synthesis, Characterization, and Density Functional Theory Calculation
title_short Carbon Quantum Dot-Incorporated Chitosan Hydrogel for Selective Sensing of Hg(2+) Ions: Synthesis, Characterization, and Density Functional Theory Calculation
title_sort carbon quantum dot-incorporated chitosan hydrogel for selective sensing of hg(2+) ions: synthesis, characterization, and density functional theory calculation
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8444287/
https://www.ncbi.nlm.nih.gov/pubmed/34549147
http://dx.doi.org/10.1021/acsomega.1c03557
work_keys_str_mv AT yanxiangyu carbonquantumdotincorporatedchitosanhydrogelforselectivesensingofhg2ionssynthesischaracterizationanddensityfunctionaltheorycalculation
AT rahmanshofiur carbonquantumdotincorporatedchitosanhydrogelforselectivesensingofhg2ionssynthesischaracterizationanddensityfunctionaltheorycalculation
AT rostamimasoumeh carbonquantumdotincorporatedchitosanhydrogelforselectivesensingofhg2ionssynthesischaracterizationanddensityfunctionaltheorycalculation
AT tabasizahraa carbonquantumdotincorporatedchitosanhydrogelforselectivesensingofhg2ionssynthesischaracterizationanddensityfunctionaltheorycalculation
AT khanfaisal carbonquantumdotincorporatedchitosanhydrogelforselectivesensingofhg2ionssynthesischaracterizationanddensityfunctionaltheorycalculation
AT alodhaybabdullah carbonquantumdotincorporatedchitosanhydrogelforselectivesensingofhg2ionssynthesischaracterizationanddensityfunctionaltheorycalculation
AT zhangyan carbonquantumdotincorporatedchitosanhydrogelforselectivesensingofhg2ionssynthesischaracterizationanddensityfunctionaltheorycalculation