In this study, electrochemical green synthesis, characterization, and application of Carbon dot-doped TiO₂ nanocomposites (TiO₂@CDs) as carbon paste electrode modifiers have been carried out. The preparation of nanocomposites begins with the synthesis of carbon dots (CDs) by varying the value of the oxidation potential. The obtained CDs were incorporated on the surface of TiO₂ through continuous stirring at room temperature followed by heating at a constant temperature of 140^oC for 4 hours. To determine the effect of potential variations of CDs on the characteristics of nanocomposites, we used SEM, XRD, and FTIR. Based on SEM characterization, potential variations of CDs didn’t affect or change the surface morphology of TiO₂. TiO₂ has a characteristic surface morphology which is composed of spherical particles of uniform size. However, XRD and FTIR characterization showed that the potential variation of CDs caused a 2θ angle shift and TiO₂ wavenumber in the fingerprint region. Potential variations of CDs caused the average particle size of TiO₂ to increase from 37.32 nm to 42.89 nm, 45.12 nm, and 49.01 nm for oxidation potentials of 10 V, 15, and 20 V, respectively. The results of the electrochemical characteristics showed superior performance of CPE in the Fe(CN)₆³-/Fe(CN)₆^4- solution system after being modified with TiO₂@CDs. Superior performance is demonstrated by significantly increased peak currents, both oxidizing and reducing. This phenomenon is strongly influenced by the size of the synthesized CDs particles through potential variations. Based on these results, a potential of 15 V is stated as the best potential in the application of CDs as a modifier.