Carbon Quantum Dots-Based Fluorescent Hydrogel Hybrid Platform for Sensitive Detection of Iron Ions. (4th April 2022)

• Record Type: Journal Article
• Authors: Wu, Shunwei; Zhou, Cuo; Ma, Chunmei; Yin, Yongzheng; Sun, Chunyan
• Other Names: Afzali Daryoush Academic Editor.
• Is Part Of: Journal of chemistry. Volume 2022(2022)
• Publication Date: 2022-04-04
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1155/2022/3737646
• Languages: English
• ISSNs: 2090-9063

Abstract

Abstract : In this study, we prepared novel fluorescent carbon quantum dots/hydrogel nanocomposite material (CQDsHG) with good adsorption and stable fluorescence detection of Fe 3+ . The materials were subsequently characterized according to their morphological features, chemical composition, adsorption, and optical properties. The carbon quantum dots (CQDs) were prepared using a microwave-assisted hydrothermal method in no more than 15 min, and the as-prepared CQDs exhibited excellent water solubility, as well as emitted strong bright blue fluorescence with an ultrahigh quantum yield of 93.60%. The CQDs were then loaded into a hydrogel (HG) using the sol-gel method to obtain a functional CQDsHG. The CQDsHG exhibited high adsorption amounts (31.94 mg/g) and a good quenching response for Fe 3+, thus, it could be used as a sensor to selectively detect Fe 3+ in the linear range of 0–150 μ M with a detection limit of 0.24 μ M. We observed minimal difference in the fluorescence lifetimes between the CQDsHG with and without a quencher (Fe 3+ ), with values of 5.816 ns and 5.824 ns, respectively, confirming that Fe 3+ was statically quenched on CQDsHG. The results indicated that the innovative combination of CQDs and HG can improve the synergistic performance of each component for the adsorption and quantitative detection of heavy metal ions in the aqueous environment.