Cargando…

Fluorescence sensing and adsorption kinetics of Gd-doped AgInS(2) I-III-VI quantum dots – A case study of Ag(+) ions interactions

The poor fluorescence properties of magneto-fluorescent paramagnetic-ion (Gd, Mn, or Co) doped I-III-VI quantum dots (QDs) at higher paramagnetic-ion doping concentrations have limited their use in magnetic-driven water-based applications. This work presents, for the first time, the use of stable ma...

Descripción completa

Detalles Bibliográficos
Autores principales: May, Bambesiwe M., Fakayode, Olayemi J., Bambo, Mokae F., Mishra, Ajay K., Nxumalo, Edward N.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Elsevier 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10469056/
https://www.ncbi.nlm.nih.gov/pubmed/37664718
http://dx.doi.org/10.1016/j.heliyon.2023.e19020
_version_ 1785099360714883072
author May, Bambesiwe M.
Fakayode, Olayemi J.
Bambo, Mokae F.
Mishra, Ajay K.
Nxumalo, Edward N.
author_facet May, Bambesiwe M.
Fakayode, Olayemi J.
Bambo, Mokae F.
Mishra, Ajay K.
Nxumalo, Edward N.
author_sort May, Bambesiwe M.
collection PubMed
description The poor fluorescence properties of magneto-fluorescent paramagnetic-ion (Gd, Mn, or Co) doped I-III-VI quantum dots (QDs) at higher paramagnetic-ion doping concentrations have limited their use in magnetic-driven water-based applications. This work presents, for the first time, the use of stable magneto-fluorescent Gd-doped AgInS(2) QDs at high Gd mole ratios of 16, 20, and 30 for the fluorescence detection and adsorption of Ag(+) ions in water environments. The effect of pH, initial concentration, contact time, and adsorbent dosage were systematically evaluated. The AgInS(2) QDs with the least Gd mole ratio (16) exhibited the best fluorescence characteristics (LOD = 0.88, R(2) = 0.9549) while all materials showed good adsorption properties under optimized conditions (pH of 2, initial concentration of 30 ppm, contact time of 10 min and adsorbent dosage of 0.02 g) and a pseudo 2nd order reaction was followed. The adsorption mechanism was proposed to be a combination of ion-exchange, electrostatic interaction, complexation, and diffusion processes. Application in environmental wastewater samples revealed complete removal of Ag (+) ions alongside Ti(2+) Pb(2+), Ni(2+), Cr(3+), and Zn(2+) ions.
format Online
Article
Text
id pubmed-10469056
institution National Center for Biotechnology Information
language English
publishDate 2023
publisher Elsevier
record_format MEDLINE/PubMed
spelling pubmed-104690562023-09-01 Fluorescence sensing and adsorption kinetics of Gd-doped AgInS(2) I-III-VI quantum dots – A case study of Ag(+) ions interactions May, Bambesiwe M. Fakayode, Olayemi J. Bambo, Mokae F. Mishra, Ajay K. Nxumalo, Edward N. Heliyon Research Article The poor fluorescence properties of magneto-fluorescent paramagnetic-ion (Gd, Mn, or Co) doped I-III-VI quantum dots (QDs) at higher paramagnetic-ion doping concentrations have limited their use in magnetic-driven water-based applications. This work presents, for the first time, the use of stable magneto-fluorescent Gd-doped AgInS(2) QDs at high Gd mole ratios of 16, 20, and 30 for the fluorescence detection and adsorption of Ag(+) ions in water environments. The effect of pH, initial concentration, contact time, and adsorbent dosage were systematically evaluated. The AgInS(2) QDs with the least Gd mole ratio (16) exhibited the best fluorescence characteristics (LOD = 0.88, R(2) = 0.9549) while all materials showed good adsorption properties under optimized conditions (pH of 2, initial concentration of 30 ppm, contact time of 10 min and adsorbent dosage of 0.02 g) and a pseudo 2nd order reaction was followed. The adsorption mechanism was proposed to be a combination of ion-exchange, electrostatic interaction, complexation, and diffusion processes. Application in environmental wastewater samples revealed complete removal of Ag (+) ions alongside Ti(2+) Pb(2+), Ni(2+), Cr(3+), and Zn(2+) ions. Elsevier 2023-08-07 /pmc/articles/PMC10469056/ /pubmed/37664718 http://dx.doi.org/10.1016/j.heliyon.2023.e19020 Text en © 2023 Published by Elsevier Ltd. https://creativecommons.org/licenses/by-nc-nd/4.0/This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
spellingShingle Research Article
May, Bambesiwe M.
Fakayode, Olayemi J.
Bambo, Mokae F.
Mishra, Ajay K.
Nxumalo, Edward N.
Fluorescence sensing and adsorption kinetics of Gd-doped AgInS(2) I-III-VI quantum dots – A case study of Ag(+) ions interactions
title Fluorescence sensing and adsorption kinetics of Gd-doped AgInS(2) I-III-VI quantum dots – A case study of Ag(+) ions interactions
title_full Fluorescence sensing and adsorption kinetics of Gd-doped AgInS(2) I-III-VI quantum dots – A case study of Ag(+) ions interactions
title_fullStr Fluorescence sensing and adsorption kinetics of Gd-doped AgInS(2) I-III-VI quantum dots – A case study of Ag(+) ions interactions
title_full_unstemmed Fluorescence sensing and adsorption kinetics of Gd-doped AgInS(2) I-III-VI quantum dots – A case study of Ag(+) ions interactions
title_short Fluorescence sensing and adsorption kinetics of Gd-doped AgInS(2) I-III-VI quantum dots – A case study of Ag(+) ions interactions
title_sort fluorescence sensing and adsorption kinetics of gd-doped agins(2) i-iii-vi quantum dots – a case study of ag(+) ions interactions
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10469056/
https://www.ncbi.nlm.nih.gov/pubmed/37664718
http://dx.doi.org/10.1016/j.heliyon.2023.e19020
work_keys_str_mv AT maybambesiwem fluorescencesensingandadsorptionkineticsofgddopedagins2iiiiviquantumdotsacasestudyofagionsinteractions
AT fakayodeolayemij fluorescencesensingandadsorptionkineticsofgddopedagins2iiiiviquantumdotsacasestudyofagionsinteractions
AT bambomokaef fluorescencesensingandadsorptionkineticsofgddopedagins2iiiiviquantumdotsacasestudyofagionsinteractions
AT mishraajayk fluorescencesensingandadsorptionkineticsofgddopedagins2iiiiviquantumdotsacasestudyofagionsinteractions
AT nxumaloedwardn fluorescencesensingandadsorptionkineticsofgddopedagins2iiiiviquantumdotsacasestudyofagionsinteractions