Year: 2025
Type: article
Abstract: In this study, we introduce a chelation‐free approach to the dual‐functional detection and removal of Hg 2+ ions using two novel silica‐based materials, AnSiO 2 and PySiO 2 , functionalized with anthracene and pyrene, respectively. These materials were synthesized via a two‐step process involving the direct condensation of triethoxyvinylsilane onto silica gel surfaces, followed by Heck coupling with 9‐bromoanthracene and 1‐bromopyrene, respectively. They exhibit strong fluorescence emission in aqueous solutions, particularly at pH 6. Upon exposure to Hg 2+ ions, both materials undergo significant fluorescence quenching, enabling sensitive and selective detection of Hg 2+ . PySiO 2 demonstrated superior performance compared to AnSiO 2 , with a lower detection limit (0.29 μM) and a higher Stern‐Volmer constant (2×10 6 M −1 ). Additionally, PySiO 2 shows a higher adsorption capacity for Hg 2+ , reaching 54.04mg/g, as confirmed by ICP‐MS analysis. The sensing mechanism involves charge‐dipole and π‐electron interactions, supported by spectroscopic analyses. Reusable for four cycles, PySiO 2 effectively removes Hg 2+ from aquaculture water, showcasing its potential for scalable, cost‐effective, and simultaneous detection and remediation of mercury in real‐world applications.
Source: Chemistry - An Asian Journal
Language: English
Subfield: Spectroscopy
Field: Chemistry
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $4,520
OpenAlex ID: W4407316644