Carbon quantum dots-loaded fluorescent hydrogel for Fe3+ ions detection

Anastasia Borodina; Sergei Kostromin; Dmitrii Pankin; Alexey Povolotskiy; Elena Ushakova; Sergei Bronnikov

doi:10.1080/03067319.2024.2395485

Carbon quantum dots-loaded fluorescent hydrogel for Fe³⁺ ions detection

Anastasia Borodina
, Sergei Kostromin
, Dmitrii Pankin
, Alexey Povolotskiy
, Elena Ushakova
, Sergei Bronnikov^*

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

7 Citations (Scopus)

Abstract

We synthesised a polyacrylamide (PAA) hydrogel filled with fluorescent carbon quantum dots (CQDs) for environmental sensing application. The obtained PAA@CQDs composite was characterised using scanning electron microscopy, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, photoluminescence (PL) spectroscopy, time correlated single photon counting and UV-visible spectroscopy. In the PAA@CQDs composite, CQDs were shown to retain their high PL properties. Being immersed into FeCl₃ solutions, PAA@CQDs samples demonstrated intensive PL quenching because of Fe³⁺ ions absorption. The limit of the Fe³⁺ ions detection was determined to be 0.124 μM. We showed the formation of non-PL complex between CQDs and Fe³⁺ ions, ensuring static mechanism of the PAA@CQDs PL quenching. © 2024 Informa UK Limited, trading as Taylor & Francis Group.

Original language	English
Pages (from-to)	5451-5466
Number of pages	16
Journal	International Journal of Environmental Analytical Chemistry
Volume	105
Issue number	17
Online published	27 Aug 2024
DOIs	https://doi.org/10.1080/03067319.2024.2395485
Publication status	Published - Dec 2025

Funding

This work was carried out within the state assignment [124013000728-0], NRC ‘Kurchatov Institute’.

Research Keywords

Carbon quantum dots
fluorescent hydrogel
iron (III) sensing
photoluminescence quenching

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10.1080/03067319.2024.2395485

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Cite this

@article{d47cc915b15e44f4afd5dcf8d0566f53,

title = "Carbon quantum dots-loaded fluorescent hydrogel for Fe3+ ions detection",

abstract = "We synthesised a polyacrylamide (PAA) hydrogel filled with fluorescent carbon quantum dots (CQDs) for environmental sensing application. The obtained PAA@CQDs composite was characterised using scanning electron microscopy, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, photoluminescence (PL) spectroscopy, time correlated single photon counting and UV-visible spectroscopy. In the PAA@CQDs composite, CQDs were shown to retain their high PL properties. Being immersed into FeCl3 solutions, PAA@CQDs samples demonstrated intensive PL quenching because of Fe3+ ions absorption. The limit of the Fe3+ ions detection was determined to be 0.124 μM. We showed the formation of non-PL complex between CQDs and Fe3+ ions, ensuring static mechanism of the PAA@CQDs PL quenching. {\textcopyright} 2024 Informa UK Limited, trading as Taylor \& Francis Group.",

keywords = "Carbon quantum dots, fluorescent hydrogel, iron (III) sensing, photoluminescence quenching",

author = "Anastasia Borodina and Sergei Kostromin and Dmitrii Pankin and Alexey Povolotskiy and Elena Ushakova and Sergei Bronnikov",

year = "2025",

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doi = "10.1080/03067319.2024.2395485",

language = "English",

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}

TY - JOUR

T1 - Carbon quantum dots-loaded fluorescent hydrogel for Fe3+ ions detection

AU - Borodina, Anastasia

AU - Kostromin, Sergei

AU - Pankin, Dmitrii

AU - Povolotskiy, Alexey

AU - Ushakova, Elena

AU - Bronnikov, Sergei

PY - 2025/12

Y1 - 2025/12

N2 - We synthesised a polyacrylamide (PAA) hydrogel filled with fluorescent carbon quantum dots (CQDs) for environmental sensing application. The obtained PAA@CQDs composite was characterised using scanning electron microscopy, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, photoluminescence (PL) spectroscopy, time correlated single photon counting and UV-visible spectroscopy. In the PAA@CQDs composite, CQDs were shown to retain their high PL properties. Being immersed into FeCl3 solutions, PAA@CQDs samples demonstrated intensive PL quenching because of Fe3+ ions absorption. The limit of the Fe3+ ions detection was determined to be 0.124 μM. We showed the formation of non-PL complex between CQDs and Fe3+ ions, ensuring static mechanism of the PAA@CQDs PL quenching. © 2024 Informa UK Limited, trading as Taylor & Francis Group.

AB - We synthesised a polyacrylamide (PAA) hydrogel filled with fluorescent carbon quantum dots (CQDs) for environmental sensing application. The obtained PAA@CQDs composite was characterised using scanning electron microscopy, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, photoluminescence (PL) spectroscopy, time correlated single photon counting and UV-visible spectroscopy. In the PAA@CQDs composite, CQDs were shown to retain their high PL properties. Being immersed into FeCl3 solutions, PAA@CQDs samples demonstrated intensive PL quenching because of Fe3+ ions absorption. The limit of the Fe3+ ions detection was determined to be 0.124 μM. We showed the formation of non-PL complex between CQDs and Fe3+ ions, ensuring static mechanism of the PAA@CQDs PL quenching. © 2024 Informa UK Limited, trading as Taylor & Francis Group.

KW - Carbon quantum dots

KW - fluorescent hydrogel

KW - iron (III) sensing

KW - photoluminescence quenching

UR - https://www.scopus.com/pages/publications/85202541676

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85202541676&origin=recordpage

U2 - 10.1080/03067319.2024.2395485

DO - 10.1080/03067319.2024.2395485

M3 - RGC 21 - Publication in refereed journal

SN - 0306-7319

VL - 105

SP - 5451

EP - 5466

JO - International Journal of Environmental Analytical Chemistry

JF - International Journal of Environmental Analytical Chemistry

IS - 17

ER -