TITLE:
Reduction Band Gap Energy of TiO2 Assembled with Graphene Oxide Nanosheets
AUTHORS:
Abdelmajid Timoumi
KEYWORDS:
Titanium (IV) Oxide, Graphene Oxide, TiO2-GO, Thin Films, Composite Materials
JOURNAL NAME:
Graphene,
Vol.7 No.4,
October
31,
2018
ABSTRACT: This research work aims to reduce the band gap of thin layers of titanium
oxide by the incorporation of graphene oxide sheets. Thin layers of the
TiO2-GO composites were prepared on a glass substrate by the spin-coating
technique from GO and an aqueous solution of TiO2. A significant decrease
in optical band gap was observed at the TiO2-GO compound compared to
that of pure TiO2. Samples as prepared were characterized using XRD, SEM
and UV-visible spectra. XRD analysis revealed the amorphous nature of the
deposited layers. Scanning electron microscope reveals the dispersion of graphene
nanofiles among titanium oxide nanoparticles distributed at the surface
with an almost uniform size distribution. The band gap has been calculated
and is around 2 eV after incorporation of Graphene oxide. The chemical
bond C-Ti between the titanium oxide and graphene sheets is at the origin of
this reduction.