Hydrothermally Synthesized TiO₂-Doped MnO₂ Nanocomposites for Electrochemical and Photocatalytic Activity

In our study, we synthesize titanium oxide (TiO[Formula: see text] and manganese dioxide (MnO[Formula: see text] using hydrothermal methods, which are TiO 2 -doped MnO 2 nanoparticles. In order to evaluate the essential optical and electronic properties of the proposed nanostructures, X-ray diffraction (XRD), Scanning electron microscopy (SEM), Fourier transformation infrared analysis (FTIR), Ultra–Visible infrared spectroscopy (UV–Vis), and Photoluminescence (PL) were applied. Based on the results of the SEM investigation, nanostructures form crystal structures when different compositions are used. It was also confirmed that TiO 2 derivatives were produced from the fabricated nanoparticles by their spectral and optical absorption characteristics. During electrochemical measurements, it was found that MnO 2 nanocomposite samples doped with TiO 2 had a markedly reduced charge transfer resistance, suggesting that electrons and holes were effectively separated by photo-stimulation. Aqueous solutions based on wastewater were shown to be degraded by TiO 2 -doped MnO 2 nanoparticles when irradiated with visible light. It was demonstrated that nanocomposites composed of TiO 2 -doped with MnO 2 and having reduced bandgap could be used for the removal of organic dyes from aqueous solutions as well as wastewater treatment were reported in detail.