Influence of NaBr on structural studies of PVA/TiO2 polymer composites

PVA-TiO2-NaBr (PVATN) polymer composites were synthesized using solution casting technique. XRD, optical absorption, FTIR, and Raman spectroscopy techniques were being used to evaluate the impact of TiO2/NaBr on PVATN polymer samples. XRD spectra have been used to examine the modification of semi-crystalline phase of PVATN polymers with regard to TiO2/NaBr weight % and TiO2 anatase phase. With the composition, the optical absorption spectra of PVATN polymer samples indicated a blue shift in the absorption edges. At the cost of TiO2, NaBr was employed to increase the indirect optical band gap measurements. Urbach energy and refractive index values were assessed and discussed in depth using optical data. The FTIR spectra of several functional groups of PVA/TiO2 were examined. The Raman spectra revealed the existence of C-C stretch, C-O stretch, O-H bend, and C-H bend vibrations, as well as O-Ti-O bend vibrations.

Automated summary

PVA-TiO2-NaBr (PVATN) polymer composites were synthesized by solution casting technique. XRD, optical absorption, FTIR, and Raman spectroscopy were used to study the influence of TiO2/NaBr on PVATN polymer samples. XRD spectra showed the modification of the semi-crystalline phase of PVATN polymers with respect to TiO2/NaBr weight % and TiO2 anatase phase. The optical absorption spectra of PVATN polymer samples exhibited a blue shift in the absorption edges with the change in composition. Urbach energy and refractive index values were evaluated and discussed using optical data. The FTIR spectra of several functional groups in PVA/TiO2 were analyzed. Raman spectra showed the presence of various vibrations in the polymer samples.