Enhanced Dielectric Properties of Α-Moo3 Nanobelts Dispersed Polyethylene Oxide-Carboxymethyl Cellulose Matrix-Based Nanocomposites

Highly crystalline molybdenum trioxide nanobelts (MoO3 NBs) are synthesized via one-step hydrothermal method and the resulting NBs are incorporated with poly(ethylene oxide) (PEO)/carboxymethyl cellulose (CMC) blend matrix via a solution-casting method to be applicable in various nanoelectronics. The structural, optical, and dielectric characteristics of the polymer nanocomposite PEO/CMC-(x)MoO3 (x = 2, 4, 6, and 8 %wt) films are comprehensively examined by different techniques, including X-ray diffraction (XRD), Fourier-transform infrared (FTIR), ultraviolet-visible (UV-Vis) spectroscopy, and broadband dielectric spectroscopy. XRD results confirm the presence of nanofiller in the (PEO/CMC) blend at a higher fraction (8 wt%). Furthermore, FTIR investigations show an electrostatic interaction between the PEO/CMC polymer composite and MoO3 nanobelts, leading to the generation of metal oxides/polymer complexes. Optical properties of the synthesized PEO/CMC(x) MoO3 matrix, including direct and indirect bandgap energies are decreased by increasing the content of MoO3 NBs in the PEO/CMC blend matrix, showing the promise of photocatalytic activity. The AC conductivity and dielectric parameters (epsilon ' and epsilon '') are markedly increased at a higher fraction of MoO3 (8 wt%). The optical and electrical conductivity properties of the synthesized PEO/CMC-(x) MoO3 design confirms its ability to be used in optoelectronic devices.