Effective photocatalytic methylene orange dye degradation ability in coloured textile contaminated water by highly efficient catalyst Schiff-based resin-encapsulated supported on TiO₂@SiO₂ metal oxide nanoparticles

ABSTRACT

Present work reports the newly synthesized resin polymethylene, bis-2-methoxy-1-napthaldehy-o-phenylenediimine (PMBMNOPhen) and then react with titanium dioxide and silicon dioxide to form encapsulated resin by metal oxide nanoparticles (PMBMNOPhenTiO₂/SiO₂) and resulted in the material is polymethylene, bis-2-methoxy-1-napthaldehy-o-phenylenediimine titanium-dioxide nanoparticles (PMBMNOPhenTiO₂). The resin-encapsulated metal oxide nanoparticles were successfully identified morphology, crystal structure, and light absorption capacity of samples were characterized via scanning electron microscope (SEM), X-ray diffraction, energy dispersive (EDS) X-ray diffraction analysis (XRD) and ultraviolet–visible spectroscopy methods. Afterwards, the resin-encapsulated metaloxide nanoparticles are used for degradation of methylene orange (MO) dye. The photo-oxidation rate of the dye is dependent on the different parameters: initial dye concentration, effect of time, the effect of NaBH₄ and effect of dose of catalyst. The degradation of MO 60–80%% in real water samples with respect time of 30–60 minutes. These results confirm the prepared resin-encapsulated titanium dioxide nanoparticles (PMBMNOPhenTiO₂/SiO₂) displaying a great photocatalytic activity for the degradation of methylene orange dye under visible light irradiation effect of a catalyst in real water sample degradation. The synthesized catalyst (PMBMNOPhenTiO₂/SiO₂) was successfully applied in real dye water solution (colored water), collected from Jamshoro, Sindh (Pakistan). The resin-encapsulated metal oxide nanoparticles showed an excellent performance to reduce MO dye in contaminated water. These results approve that the resin-encapsulated titanium dioxide nanoparticles (PMBMNOPhenTiO₂) display a great photocatalytic activity for the degradation of MO dye under visible light irradiation degradation. Photocatalytic degradation using resin-encapsulated (TiO₂/SiO₂) catalyst is effectively used for the textile dye (MO).

GRAPHICAL ABSTRACT

KEYWORDS:

• Methyl orange
• degradation
• nanoparticles
• catalyst
• photocatalytic
• polluted water

Acknowledgments

The authors are grateful to Dr. M.A. Kazi Institute of Chemistry, Sindh, University Jamshoro, Pakistan, and authors are also thankful to H.E.J. Research Institute of Chemistry, International Centre for Chemical and Biological Sciences, University of Karachi, Pakistan, who supported for performing analysis on different instruments. Authors are also thankful to Istanbul Technical University, Faculty of Science and Letters, Department of Physics Engineering Maslak, Istanbul, Turkey, Department National Centre of Excellence in Analytical Chemistry, Sindh University Jamshoro, Department of Mehran University of Engineering and Technology, Jamshoro, Pakistan, for providing infrastructure and other facilities to carry out research.

Disclosure statement

No potential conflict of interest was reported by the authors.