Modification of Graphene Oxide/V₂O₅·nH₂O Nanocomposite Films via Direct Laser Irradiation

Herein, photothermal modification of nanocomposite films consisting of hydrated vanadium pentoxide (V₂O₅·nH₂O) nanoribbons wrapped with graphene oxide (GO) flakes was performed via 405 nm direct laser irradiation. The combination of X-ray diffraction, X-ray photoelectron spectroscopy, Raman scattering, transmission electron microscopy, and scanning electron microscopy allowed comprehensive characterization of physical and chemical changes of GO/V₂O₅·nH₂O nanocomposite films upon photothermal modification. The modified nanocomposite films exhibited porous surface morphology (17.27 m² g^-1) consisting of randomly distributed pillarlike protrusions. The photothermal modification process of GO/V₂O₅·nH₂O enhanced the electrical conductivity of nanocomposite from 1.6 to 6.8 S/m. It was also determined that the direct laser irradiation of GO/V₂O₅·nH₂O resulted in considerable decrease of C-O bounds as well as O-H functional groups with an increase of the laser power density.