Development of a Functional Material Based on Tiron-Immobilized Filter Paper for The Determination of Silver(I) Ions and Its Spectroscopic Characterization
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Nadirbek Sabirov, Ashirov Mansur, Norbek Palvanov
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This study reports the immobilization of the organic reagent Tiron onto filter paper to create a simple and low-cost optical platform for the determination of silver(I) ions. Immobilization was performed by soaking the paper in an aqueous Tiron solution (1.0 × 10⁻³ mol/L) followed by drying at room temperature. The resulting material was treated with Ag(I) ions and characterized by diffuse reflectance spectroscopy (DRS) and Fourier-transform infrared (FTIR) spectroscopy. The DRS spectra revealed a pronounced change in the optical response both after Tiron immobilization and after the binding of Ag(I) ions, confirming the formation of surface coordination complexes. FTIR analysis confirmed the successful immobilization of Tiron onto the cellulose matrix and the participation of the hydroxyl and sulfonate functional groups in coordination with Ag(I) ions. The developed Tiron-functionalized filter paper is inexpensive, environmentally safe, and easy to prepare, making it a promising material for the sorption of silver(I) ions and for the fabrication of paper-based optical sensors.
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Authors
Nadirbek Sabirov, Ashirov Mansur, Norbek Palvanov
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References:
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