Document Abstract
We report the synthesis of graphene oxide/nickel oxide/β-
cyclodextrin (GO/NiO/β-CD) nanocomposite and the efficiency of
the nanocomposite in decolourising two different dyes, methylene
blue (MB) and methyl violet (MV). GO was prepared by modified
Hummer’s method while hydrothermal method was used for the
preparation of GO/NiO/β-CD. The as-synthesised nanocomposites
were characterised by X-ray diffraction (XRD), and Fourier transform
infrared (FTIR) spectroscopy, Raman spectroscopy and high resolution
transmission electron microscopy (HR-TEM). Photocatalytic
degradation was carried out under solar light by monitoring the
concentration of MB and MV dyes. Degradation reaction followed
Langmuir-Hinshelwood pseudo first-order kinetic model. The apparent
reaction rate constant (k) for MB increased as compared to MV
under solar light irradiation. The MB showed better photocatalytic
degradation efficiency by GO/NiO/β-CD composites. GO/NiO/β-CD
nanocomposite has been very favourable for photocatalytic
application.