Optical, and electrical conductivity properties of ZnO and TiO2 nanoparticles scattered in PEO-PVA for electrical devices

Polyvinyl alcohol (PVA)/Polyethylene oxide (PEO) has been blended and doped with zinc oxide and titanium oxide nanoparticles. Different concentration of the prepared ZnO and TiO2 NPs make a change in PVA/PEOZnO/TiO2 NPs nanocomposites films improve the characterization of PVA/PEO. XRD scans show two broad peaks at about 18.8 degrees and 21.95 degrees for PVA/PEO blend. XRD scans show of PVA/PEO- ZnO/TiO2 NPs nanocomposites films obtain the hexagonal structure of ZnO and the anatase phase of TiO2 NPs. The addition of dopants in the PVA/PEO blend results in a reduce in degree of crystallinity compared to the pure blend. This is evident from the decrease in the crystallinity index (Xc value) from 37.25 to 22.31. This reduction in crystallinity can have implications for the material's opticla, thermal, and electrical properties, and should be considered when evaluating its suitability for specific applications. FT-IR results show changes in intensity of bands that could be assigned to the strong interaction between PVA/PEO and ZnO/TiO2 nanoparticles. The Egopt values reduced by raising laser ablation time due to unstructured defects that enhanced the density of localized states in the band gap, dropping from 4.72 eV to 3.0 eV for direct transitions and from 3.05 eV to 2.35 eV for indirect transitions. It undergoes complete decomposition at a higher temperature, resulting in a mass percentage of 45 & PLUSMN; 0.3 wt%. In comparison, the pure polymer blend sample has a lower mass percentage of 33 & PLUSMN; 0.03 wt% during the same temperature range. The fabricated system of PVA/PEO- ZnO/TiO2 NPs nanocomposites films showing improved in AC conductivity and dielectric characteristics and could be suggested in electrical applications.

Automated summary

Polyvinyl alcohol (PVA)/Polyethylene oxide (PEO) blended and doped with zinc oxide and titanium oxide nanoparticles affect the crystallinity, optical, thermal, and electrical properties of the nanocomposites films. The interaction between PVA/PEO and ZnO/TiO2 nanoparticles was observed through changes in band intensity in FT-IR results. The addition of dopants reduced the crystallinity index, and laser ablation time affected the Egopt values. The fabricated PVA/PEO-ZnO/TiO2 NPs nanocomposites films exhibited improved AC conductivity and dielectric characteristics for electrical applications.