Analytical and Bioanalytical Electrochemistry is an international scientific journal, which is published online every 3 months (since 2009), every 2 months (since 2011) and monthly (since 2018) by Center of Excellence in Electrochemistry, University of Tehran Analytical and Bioanalytical Electrochemistry - 17 3 2025 03 31 Electrochemical Detection of Catechol using Synthesized Titanium Oxide Nanoparticles 204 216 722373 10.22034/abec.2025.722373 EN Ramesh S. Bhat Chemistry, NMAM Institute of Technology, Nitte-574110 0000-0001-5399-0405 Adigerhalli G. Bindu Department of Chemistry, NMAM Institute of Technology, NITTE (Deemed to be University), Nitte-574110, India Shivani Shivani Department of Chemistry, NMAM Institute of Technology, NITTE (Deemed to be University), Nitte-574110, India Ampar C. Hegde Electrochemistry Laboratory, Department of Chemistry, National Institute of Technology Karnataka, Srinivasnagar, 575025, India Journal Article 2024 12 24 The fabrication of advanced electrodes has garnered significant attention due to their exceptional sensitivity and selectivity for detecting catechol samples. Titanium dioxide nanoparticles (TiO₂ NPs) have emerged as highly effective modifiers for carbon paste electrodes (CPEs), attributed to their unique electrochemical characteristics and enhanced conductivity. In this study, TiO₂ NPs are prepared via the combustion method (CM), offering a reliable strategy for boosting electrode performance. This work aims to synthesize the TiO₂ NPs by using Titanium (III) sulfate as precursor materials, and citric acid as fuel to get the desired TiO₂ NPs. The confirmation of NPs is done through various techniques such as field emission scanning microscopy (FESEM), microstructure analysis by XRD, elemental composition by EDS, and absorption vibration levels by Raman spectroscopy. TiO₂ NPs are used for the development of electrode applications to determine catechol (CC) using carbon paste electrodes (CPE). The electrode surface is modified into a TiO₂ composite carbon paste electrode (TiCCPE). The electrochemical techniques are performed using a phosphate buffer solution (BS) of 0.1 M at a pH range of 7.0 of a two-electron transfer system with scan rates variation from 0.50-0.400 V/s signifies reaction of absorption-controlled process, and concentration studies from 0.2 µM to 1.6 µM with detection and quantification limit of 0.21 µM and 0.71 µM and was found using Linear sweep voltammetry technique (LSV). The electrode modification associated with synthesized TiO₂ NPs assists in an outstanding way to sense the CC, as good sensitivity, stability, selectivity, and reproducibility of catechol detection were assessed using electrochemical techniques throughout the studies. https://www.abechem.com/article_722373_43ab69fdf5999aaf838e6215eb1574ac.pdf