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

Algirdas Lazauskas,Mindaugas Andrulevicius,Liutauras Marcinauskas

doi:10.1021/acsami.0c02066

Algirdas Lazauskas, Mindaugas Andrulevicius + Show 1 more

Open Access

https://doi.org/10.1021/acsami.0c02066

Copy DOI

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.

Highlights

Vanadium pentoxide (V2O5) has gained substantial scientific interest due to its outstanding properties in many different applications, such as lithium−ion batteries (LIB),[1,2] supercapacitors,[3,4] field-effect transistors,[5] sensors,[6−8] electrochromic devices,[9−11] and actuators.[12]
We reported on the photothermal modification of nanocomposite films consisting of hydrated vanadium pentoxide (V2O5·nH2O) wrapped with graphene oxide (GO) flakes through 405 nm direct laser irradiation
scanning electron microscopy (SEM) observations suggest that photothermal modification of GO/V2O5·nH2O results in formation of reduced graphene oxide (rGO)/V2O5·nH2O with heterogeneous surface morphology having a combination of micro- and nanoscale structural features

Summary

Introduction

Vanadium pentoxide (V2O5) has gained substantial scientific interest due to its outstanding properties in many different applications, such as lithium−ion batteries (LIB),[1,2] supercapacitors,[3,4] field-effect transistors,[5] sensors,[6−8] electrochromic devices,[9−11] and actuators.[12]. Observations imply that V2O5·nH2O nanoribbons are not distinguishable from GO sheets on the surface of nanocomposite film, which is consistent with TEM results, that

Results

Conclusion