Simultaneous ratiometric fluorescence determination and removal of copper ions by a magnetic nanocomposite.

ABSTRACT: The exploitation of a bifunctional material for both identifying and extracting heavy metal ions (HMIs) is essential but still poses a major hurdle. In this work, a novel magnetic fluorescent nanocomposite (Fe₃O₄/CD@SiO₂-QD) was successfully prepared for the specific detection and removal of Cu²⁺. Magnetic fluorescent nanoparticles (Fe₃O₄/CDs) exhibiting blue fluorescence were synthesized via a one-step hydrothermal approach, and a magnetic ratiometric fluorescence sensor was prepared after SiO₂ and red fluorescent CdTe quantum dots were coated on the surface. When Cu²⁺ is present in the solution, the red fluorescence of the magnetic ratiometric fluorescence sensor is quenched, and the blue fluorescence

SUBMITTER: Zhong L 

PROVIDER: S-EPMC12289927 | biostudies-literature | 2025 Jul

REPOSITORIES: biostudies-literature