Synthesis, Characterization, Dielectric and Antibacterial Studies of TiO2-Phosphomolybdic Acid Nanocomposite

In this work, the synthesis of TiO2-phosphomolybdic acid nanocomposites was achieved by annealing method and characterized by UV-visible, FT-IR, XRD, EDAX and SEM. The UV-visible spectroscopy revealed a strong interaction between the TiO2 and phosphomolybdic acid, while the FT-IR spectroscopy confirmed the presence of phosphomolybdic acid in the nanocomposite. Moreover, the X-ray diffraction (XRD) analysis revealed a decrease in the crystallite size of the nanocomposite materials. This finding was further supported by the SEM images, which exhibited a reduction in particle size and a uniform distribution of the dopant. The photocatalytic activity of the nanocomposite, the methylene blue dye degradation was used and the results proved a good catalytic activity (99.41%). The favourable results have been obtained by measuring the dielectric constants and analyzing the temperature dependence of AC and DC electrical conductivities of the composite materials. The antibacterial properties of the nanocomposites were also evaluated using the agar well diffusion method on Streptococcus pyogenes, exhibiting the significant results. Overall, the synthesized TiO2-phosphomolybdic acid nanocomposites have proven as promising composites in various studies, suggesting their potential applications in many different fields.