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Vol. 37 No. 10 (2025): Vol 37 Issue 10, 2025

Copyright (c) 2025 Pandiyarajan A, Sushma C. K, David John Dmonte, Veeramani S, Vidhya Bhojan, Nandhakumar R

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This work is licensed under a Creative Commons Attribution 4.0 International License.

TiO2-Anchored Graphene Nanocomposite as Robust Fluorometric Sensor for Ag+ Ions and its Real Sample Analysis

https://doi.org/10.14233/ajchem.2025.34445
A. Pandiyarajan
Department of Nanosciences and Technology, Karunya Institute of Technology and Sciences (Deemed-to-be University), Karunya Nagar, Coimbatore-641114, India
https://orcid.org/0000-0002-1934-8352
C.K. Sushma
Division of Physical Sciences, Karunya Institute of Technology and Sciences (Deemed-to-be University), Karunya Nagar, Coimbatore-641114, India
https://orcid.org/0009-0004-9804-0584
David John Dmonte
Department of Nanosciences and Technology, Karunya Institute of Technology and Sciences (Deemed-to-be University), Karunya Nagar, Coimbatore-641114, India
https://orcid.org/0000-0003-4587-8071
S. Veeramani
Division of Physical Sciences, Karunya Institute of Technology and Sciences (Deemed-to-be University), Karunya Nagar, Coimbatore-641114, India
https://orcid.org/0009-0004-0968-1444
B. Vidhya
Division of Physical Sciences, Karunya Institute of Technology and Sciences (Deemed-to-be University), Karunya Nagar, Coimbatore-641114, India
https://orcid.org/0000-0003-3120-1668
R. Nandhakumar
Division of Physical Sciences, Karunya Institute of Technology and Sciences (Deemed-to-be University), Karunya Nagar, Coimbatore-641114, India
https://orcid.org/0000-0001-9801-7318

Corresponding Author(s) : B. Vidhya

vidhya@karunya.edu

Asian Journal of Chemistry, Vol. 37 No. 10 (2025): Vol 37 Issue 10, 2025

Abstract

A hybrid nanocomposite comprised of reduced graphene oxide and titanium dioxide (rGO-TiO2) was synthesized from graphite following reduced graphene oxide synthesis, which utilized a modified Hummer’s method and then subsequently reduced. The optical, morphological and structural properties of the hybrid composite were characterized with FTIR, UV-Vis, SEM, XRD and photoluminescence spectroscopy. The rGO-TiO2 composite retains its in-solution affinity and selectivity for Ag+ ions in an aqueous medium in spite of the presence of other metal ions. The sensing capabilities of this fluorometric sensor arise from the inhibition of photoinduced electron transfer mechanism (PET). The rGO-TiO2 hybrid composite represents a low-cost, sensitive and effective sensing platform for the hazardous monitoring of metal ions under ambient conditions, particularly silver.

Keywords

Reduced graphene oxide Silver ions Chemosensor Fluorescence Water samples
(1)
Pandiyarajan, A.; Sushma, C.; Dmonte, D. J.; Veeramani, S.; Vidhya, B.; Nandhakumar, R. TiO2-Anchored Graphene Nanocomposite As Robust Fluorometric Sensor for Ag+ Ions and Its Real Sample Analysis. ajc 2025, 37, 2571-2577.
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