Modification of Graphene Oxide/V2O5· n H2O Nanocomposite Films via Direct Laser Irradiation

Algirdas Lazauskas; Liutauras Marcinauskas; Mindaugas Andrulevicius

doi:10.1021/acsami.0c02066

Modification of Graphene Oxide/V₂O₅· n H₂O Nanocomposite Films via Direct Laser Irradiation

ACS Appl Mater Interfaces. 2020 Apr 22;12(16):18877-18884. doi: 10.1021/acsami.0c02066. Epub 2020 Apr 13.

Authors

Algirdas Lazauskas^{1

2}, Liutauras Marcinauskas^{1

3}, Mindaugas Andrulevicius²

Affiliations

¹ Plasma Processing Laboratory, Lithuanian Energy Institute, Breslaujos 3, LT44403 Kaunas, Lithuania.
² Institute of Materials Science, Kaunas University of Technology, K. Baršausko 59, LT51423 Kaunas, Lithuania.
³ Department of Physics, Kaunas University of Technology, Studentų 50, LT-51368 Kaunas, Lithuania.

Abstract

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.

Keywords: functional; graphene oxide; laser; nanocomposite; photothermal modification; vanadium pentoxide.