Abstract
TiO2 nanoparticles have been synthesized by solvent free-hydrothermal. TiO2 nanoparticles were
annealed at 500?C for enhancing characterization and the photocatalytic activity. The
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synthesized TiO2 was characterized by X-ray diffraction (XRD), field emission scanning electron
microscopy (FE-SEM), atomic force microscopy (AFM), BET, and diffuse reflectance
spectroscopy (UV-DR) techniques to study the morphology, and structural configuration. The
effects of different parameters such as the initial dye concentration, catalyst concentration, pH of
the solution, light intensity and reactive oxygen species (ROSs) on relative photonic efficiencies
and photocatalytic degradation kinetics of GRL were investigated, the degradation of GRL
follows pseudo-first order kinetics according to the Langmuir–Hinshelwood model. The reactive
oxygen species studies indicate that hydroxyl radicals and holes are the predominant reactive
species within the same step, contributing up to 92.64%, hydroxyl radicals participate for about
55%, and holes share for about 37.64% in the photocatalytic degradation of GRL.