ArticleJournal of fluorescence2025
Development of a ZnQ@Zn-HKUST-1-Based Fluorescence Sensor for Trace-Level Arsenate Ion Detection.
Article in Journal of fluorescence, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Arsenic contamination in water sources poses serious environmental and health risks, necessitating sensitive and selective detection systems. Among arsenic species, arsenate ions (AsO₄3⁻) are particularly widespread and hazardous, demanding efficient trace-level monitoring methods. This study presents a fluorescence-based sensor developed using two-dimensional (2D) Zn-HKUST-1 nanosheets for the selective detection of arsenate ions in groundwater. The sensor's fluorescence performance was enhanced by incorporating 8-hydroxyquinoline (8-Q) during solvothermal synthesis, which coordinated with Zn2⁺ ions to form fluorescent ZnQ compounds. These ZnQ units were uniformly encapsulated within the Zn-HKUST-1 framework, yielding ZnQ@Zn-HKUST-1 nanosheets with improved physicochemical and optical properties. The material's structure and morphology were characterized using FTIR, XRD, and SEM, while fluorescence spectroscopy evaluated its sensing capabilities. The sensor exhibited a highly sensitive detection limit of 0.0521 nM for AsO₄3⁻ and outstanding selectivity over other metal ions such as Ni2⁺, Cu2⁺, Cr₂O₇2⁻, and Pb2⁺. This selectivity stems from the strong affinity of the ZnQ-modified framework for arsenate ions. The study highlights the potential of ZnQ@Zn-HKUST-1 as a powerful material for fluorescence-based arsenate sensing, offering a promising tool for water quality monitoring and public health protection.
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