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Trithiocyanuric acid-functionalized nanoporous silica: synthesis and application as an Ag+ selective optical probe

Fatemeh Hemmati Tirabadi, Leila Hajiaghababaei, Ramin M. A. Tehrani, Alireza Badiei, and Afsane Mollahosseini

Department of Chemistry, Yadegar-e-Imam Khomeini (RAH) Shahre Rey Branch, Islamic Azad University, Tehran, Iran

 

E-mail: lhajiaghababaei@yahoo.com

Received: 9 April 2022  Accepted: 28 June 2022

Abstract:

In this study, trithiocyanuric acid-functionalized nanoporous silica (SBA-15-TTCA) was synthesized and applied as an optical probe to create a new fluorescence sensor for rapidly determining Ag+ ion concentrations in aqueous solutions. XRD patterns verified that the mesoporous silica had hexagonal symmetry, as anticipated. The grafted organic group on the surface SBA-15 was confirmed by thermal gravimetric analysis, and FT-IR spectra confirmed the existence of TTCA groups in the silica system. Centered on N2 adsorption–desorption, the functionalized product had a BET surface area of 381 m2g−1 and a pore diameter of 5.1 nm. SEM and EDX images of SBA-15- TTCA show the morphology of the rope-shaped and the presence of N and S atoms in the TTCA ligand located on the SBA-15. The fluorescence properties of the TTCA-functionalized SBA-15 were then investigated to assess the SBA-15-TTCA’s metal cation sensing capability. With adding Ag+ ions, SBA-15-TTCA displayed a strong fluorescence peak of about 292 nm, which was increased. Ag+ can be detected quantitatively in a relatively broad working range of 3.6 × 10−5 to 2.0 × 10−4 M, with an LOD of 15.2 × 10–6 M. The results of the experiments showed that this chemosensor offers a novel method for the selective, rapid identification of Ag+ over a wide working range.

Keywords: Nanoporous; SBA-15; Trithiocyanuric acid; Ag+; Fluorescence sensor

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-022-02358-y

 

Chemical Papers 76 (10) 6629–6637 (2022)

Tuesday, March 05, 2024

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