Abstract
Mercury (Hg), being a highly toxic environmental contaminant, poses serious ecological and health problems even at low quantities. Accurate and sensitive methods for detecting Hg2+ ions in environment are desperately needed. Also, the production of red emissive nanophosphors with outstanding color purity is a critical requirement for the next-generation display systems and lighting industry. A red emitting Co/Ag@ZnS QDs phosphor were prepared and studied to enhance the color characteristics of warm white light emitting diodes. The phosphors are synthesized using a co-precipitation technique, and the evolution of emission spectra are examined by the addition of dopants, significantly increasing PL QY up to 27.6%. A highly sensitive fluorescence sensor has been fabricated for Hg2+ detection using a quenching mechanism that has an excellent linear range of 0–50 µM, a correlation coefficient of 0.989, and a detection limit of 0.13 µM. More crucially, the proposed fluorescence sensing platform successfully and satisfactory detects Hg2+ in real water samples. These phosphors, which exhibit impressive CIE chromaticity coordinates, good CCT values, and high color purity (91.1%) may find substantial use in displays and demonstrate their effectiveness as red phosphors.
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