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A High‐Efficiency and Low‐Cost Luminescent Sensor for Rapid Cu 2+ Detection
Author(s) -
Su Jian,
Wang Lu
Publication year - 2025
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.202500012
Subject(s) - luminescence , computer science , optoelectronics , materials science , nanotechnology
In this work, a simple, low‐cost, rapid, and highly selective method for the detection of Cu 2+ is developed using luminescence core–shell structure Gd 2 O 3 :Eu 3+ @SiO 2 composites. The sample has been characterized by X‐ray diffraction, transmission electron microscopy, and photoluminescence. Systematic luminescence studies demonstrate that Gd 2 O 3 :Eu 3+ @SiO 2 exhibits a high quenching efficiency for Cu 2+ detection through the inner filter effect. Additionally, the fluorescence intensity of Gd 2 O 3 :Eu 3+ @SiO 2 decreases with the increasing concentration of Cu 2+ , and the low detection limit is 9.7 × 10 −5 M −1 . The sensing system is successfully applied to the detection of Cu 2+ in human urine samples, showing high recyclability. Furthermore, the fluorescence quenching mechanism of the Gd 2 O 3 :Eu 3+ @SiO 2 /Cu 2+ mixture is investigated in depth.