Investigation the changes in the concentration of dye organic pollutant using magnetic titania nanoparticles incorporated on surface of graphene oxide

Abstract

Abstract In this study, in order to prepare magnetic nanocomposite, TiO2 nanoparticles and Fe3O4 nanoparticles are uniformly synthesized on the surface of graphene oxide by hydrolysis and hydrothermal methods, respectively. The efficiency of the synthesized nanocomposite (MGO@ Fe3O4) for the photocatalytic decomposition of methyl orange is investigated and compared with the magnetic hybrid without graphene oxide (Fe3O4@ TiO2). FTIR and VSM analysis are used to characterize the synthesized nanocomposite and hybrid. FTIR analysis confirmed the bond vibrations in TiO2 and Fe3O4 molecules present in both photocatalytic samples. VSM analysis shows the superparamagnetic properties of the synthesized photocatalysts. Investigating the effect of irradiation time and photocatalyst concentration on the ability to remove methyl orange by magnetic photocatalysts showed that both parameters have a positive effect, although based on the results of statistical analysis, irradiation time is more effective than photocatalyst concentration. It is also observed that despite the independent operating parameters having a significant effect on the photocatalytic activity of nanocomposite and hybrid, the mutual interaction between individual factors in nanocomposite and hybrid behaves differently.

Keywords

• Graphene oxide
• Magnetic photocatalysts
• Mutual interaction
• Organic pollutants
• Statistical analysis