Cr2C MXene quantum dots for selective detection of mercury ions

Title

Cr2C MXene quantum dots for selective detection of mercury ions

Creator

R, Madhushree; Sunajadevi, Kalathiparambil Rajendra Pai; Pinheiro, Dephan

Description

Mercury (Hg), a highly toxic environmental contaminant that presents significant ecological and health risks, even at low concentrations. There is an urgent need for precise and sensitive methods for detecting Hg2+ ions in the environment. In recent years, a new class of 2D layered materials, MXene, has gained enormous attention due to their unique properties, such as high surface area, oxidation resistance, thermal and chemical stability, electrical and thermal conductivity. This study presents the synthesis and characterization of Cr2C MXene quantum dots (MQDs) derived from Cr2CTx nanolayered MXene sheets via the probe-sonication method. The Cr2C-MQDs were characterized using XRD, FTIR, SEM-EDS mapping, and Zeta potential analysis. The vibrant green fluorescence material, Cr2C-MQDs, was investigated for Hg2+ detection, which exhibited high selectivity and stability with a limit of detection of 30.7 nM. The sensing mechanism is attributed to the strong affinity of Cr2C MXene quantum dots for Hg2+ ions. 2025 Elsevier B.V.

Source

Optical Materials;Volume;166;Issue;;Article No.;117218;

Date

01-01-2025

Publisher

Elsevier B.V.

Subject

Cr₂C-MQDs; Cr₂CT_x MXene; Fluorescence quenching; Hg²⁺ sensing

Coverage

R M., Department of Chemistry, Christ University, Karnataka, Bangalore, 560029, India; Sunajadevi K.R.P., Department of Chemistry, Christ University, Karnataka, Bangalore, 560029, India; Pinheiro D., Department of Chemistry, Christ University, Karnataka, Bangalore, 560029, India

Rights

Restricted Access; Hardcopy may be available in the library

Relation

ISSN: 9253467; CODEN: OMATE

Format

online

Language

English

Type

Article

Identifier

https://doi.org/10.1016/j.optmat.2025.117218

https://www.scopus.com/pages/publications/105007062668?origin=resultslist